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147 148<meta name="generator" content="Hexo 4.2.1"></head> 149<body itemscope itemtype="http://schema.org/WebPage" lang="zh-Hans"> 150 151 152 153 154 155 156 <div class="container sidebar-position-left 157 page-home"> 158 <div class="headband"></div> 159 160 <header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader"> 161 <div class="header-inner"><div class="site-brand-wrapper"> 162 <div class="site-meta "> 163 164 165 <div class="custom-logo-site-title"> 166 <a href="/" class="brand" rel="start"> 167 <span class="logo-line-before"><i></i></span> 168 <span class="site-title">ç®</span> 169 <span class="logo-line-after"><i></i></span> 170 </a> 171 </div> 172 173 <p class="site-subtitle">人ççæï¼å¦æµ·æ è¾¹ï¼è大éè³ç®ã</p> 174 175 </div> 176 177 <div class="site-nav-toggle"> 178 <button> 179 <span class="btn-bar"></span> 180 <span class="btn-bar"></span> 181 <span class="btn-bar"></span> 182 </button> 183 </div> 184</div> 185 186<nav class="site-nav"> 187 188 189 190 <ul id="menu" class="menu"> 191 192 193 <li class="menu-item menu-item-home"> 194 <a href="/" rel="section"> 195 196 <i class="menu-item-icon fa fa-fw fa-home"></i> <br /> 197 198 é¦é¡µ 199 </a> 200 </li> 201 202 203 <li class="menu-item menu-item-archives"> 204 <a href="/archives/" rel="section"> 205 206 <i class="menu-item-icon fa fa-fw fa-archive"></i> <br /> 207 208 彿¡£ 209 </a> 210 </li> 211 212 213 <li class="menu-item menu-item-categories"> 214 <a href="/categories/" rel="section"> 215 216 <i class="menu-item-icon fa fa-fw fa-th"></i> <br /> 217 218 åç±» 219 </a> 220 </li> 221 222 223 <li class="menu-item menu-item-tags"> 224 <a href="/tags/" rel="section"> 225 226 <i class="menu-item-icon fa fa-fw fa-tags"></i> <br /> 227 228 æ ç¾ 229 </a> 230 </li> 231 232 233 234 </ul> 235 236 237 238</nav> 239 240 241 242 </div> 243 </header> 244 245 <main id="main" class="main"> 246 <div class="main-inner"> 247 <div class="content-wrap"> 248 <div id="content" class="content"> 249 250 <section id="posts" class="posts-expand"> 251 252 253 254 255 256 257 258 259 260 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 261 262 263 264 <div class="post-block"> 265 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2020/05/22/WebSocket%E3%80%81Socket%E3%80%81TCP%E3%80%81HTTP%E5%8C%BA%E5%88%AB/"> 266 267 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 268 <meta itemprop="name" content="忍"> 269 <meta itemprop="description" content=""> 270 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 271 </span> 272 273 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 274 <meta itemprop="name" content="ç®"> 275 </span> 276 277 278 <header class="post-header"> 279 280 281 282 <h1 class="post-title" itemprop="name headline"> 283 284 <a class="post-title-link" href="/2020/05/22/WebSocket%E3%80%81Socket%E3%80%81TCP%E3%80%81HTTP%E5%8C%BA%E5%88%AB/" itemprop="url">WebSocketãSocketãTCPãHTTPåºå«</a></h1> 285 286 287 <div class="post-meta"> 288 <span class="post-time"> 289 290 <span class="post-meta-item-icon"> 291 <i class="fa fa-calendar-o"></i> 292 </span> 293 294 <span class="post-meta-item-text">å表äº</span> 295 296 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2020-05-22T19:05:13+08:00"> 297 2020-05-22 298 </time> 299 300 301 302 303 304 </span> 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 </div> 322 </header> 323 324 325 326 327 328 <div class="post-body" itemprop="articleBody"> 329 330 331 332 333 334 335 336 337 338 339 340 </div> 341 <!-- ç¸å ³æç« æ¨è --> 342 343 344 345 346 347 348 349 350 351 352 353 <footer class="post-footer"> 354 355 356 357 358 359 360 361 362 <div class="post-eof"></div> 363 364 </footer> 365 </div> 366 367 368 369 </article> 370 371 372 373 374 375 376 377 378 379 380 381 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 382 383 384 385 <div class="post-block"> 386 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2020/05/19/Springboot%E9%A1%B9%E7%9B%AE%E7%9A%84%E6%8E%A5%E5%8F%A3%E9%98%B2%E5%88%B7/"> 387 388 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 389 <meta itemprop="name" content="忍"> 390 <meta itemprop="description" content=""> 391 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 392 </span> 393 394 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 395 <meta itemprop="name" content="ç®"> 396 </span> 397 398 399 <header class="post-header"> 400 401 402 403 <h1 class="post-title" itemprop="name headline"> 404 405 <a class="post-title-link" href="/2020/05/19/Springboot%E9%A1%B9%E7%9B%AE%E7%9A%84%E6%8E%A5%E5%8F%A3%E9%98%B2%E5%88%B7/" itemprop="url">Springboot项ç®çæ¥å£é²å·</a></h1> 406 407 408 <div class="post-meta">
409 <span class="post-time"> 410 411 <span class="post-meta-item-icon"> 412 <i class="fa fa-calendar-o"></i> 413 </span> 414 415 <span class="post-meta-item-text">å表äº</span> 416 417 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2020-05-19T16:25:27+08:00"> 418 2020-05-19 419 </time> 420 421 422 423 424 425 </span> 426 427 428 <span class="post-category" > 429 430 <span class="post-meta-divider">|</span> 431 432 <span class="post-meta-item-icon"> 433 <i class="fa fa-folder-o"></i> 434 </span> 435 436 <span class="post-meta-item-text">åç±»äº</span> 437 438 439 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 440 <a href="/categories/spring-boot/" itemprop="url" rel="index"> 441 <span itemprop="name">spring boot</span> 442 </a> 443 </span> 444 445 446 447 448 </span> 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 </div> 465 </header> 466 467 468 469 470 471 <div class="post-body" itemprop="articleBody"> 472 473 474 475 476 477 478 479 <p>å建ä¸ä¸ªæ³¨è§£ï¼éè¿æ³¨è§£æ§å¶æ¥å£è¯·æ±æ¬¡æ°</p> 480<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Retention</span>(RetentionPolicy.RUNTIME)</span><br><span class="line"><span class="meta">@Target</span>(ElementType.METHOD)</span><br><span class="line"><span class="keyword">public</span> <span class="meta">@interface</span> AccessControl {</span><br><span class="line"> <span class="comment">// å¨ second ç§å ï¼æå¤§åªè½è¯·æ± maxCount 次</span></span><br><span class="line"> <span class="function"><span class="keyword">int</span> <span class="title">seconds</span><span class="params">()</span></span>;</span><br><span class="line"> <span class="function"><span class="keyword">int</span> <span class="title">maxCount</span><span class="params">()</span></span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure> 481<p>æ¦æªå¨å¤ç注解信æ¯</p> 482<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Component</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">
482AccessControlInterceptor</span> <span class="keyword">extends</span> <span class="title">HandlerInterceptorAdapter</span> </span>{</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Autowired</span></span><br><span class="line"> <span class="keyword">private</span> RedisTemplate redisTemplate;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">preHandle</span><span class="params">(HttpServletRequest request, HttpServletResponse response, Object handler)</span> <span class="keyword">throws</span> Exception </span>{</span><br><span class="line"> <span class="comment">//å¤æè¯·æ±æ¯å¦å±äºæ¹æ³ç请æ±</span></span><br><span class="line"> <span class="keyword">if</span>(handler <span class="keyword">instanceof</span> HandlerMethod){</span><br><span class="line"> HandlerMethod hm = (HandlerMethod) handler;</span><br><span class="line"> <span class="comment">//è·åæ¹æ³ä¸ç注解,çæ¯å¦æè¯¥æ³¨è§£</span></span><br><span class="line"> AccessControl accessControl = hm.getMethodAnnotation(AccessControl<span class="class">.<span class="keyword">class</span>)</span>;</span><br><span class="line"> <span class="keyword">if</span>(accessControl == <span class="keyword">null</span>){</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">int</span> seconds = accessControl.seconds();</span><br><span class="line"> <span class="keyword">int</span> maxCount = accessControl.maxCount();</span><br><span class="line"> String key = request.getRequestURI()+request.getSession().getId();</span><br><span class="line"> <span class="comment">// ä»ç¼åä¸è·åï¼å½åè¿ä¸ªè¯·æ±è®¿é®äºå 次</span></span><br><span class="line"> Integer redisCount = (Integer) redisTemplate.opsForValue().get(key);</span><br><span class="line"> <span class="keyword">if</span>(redisCount == <span class="keyword">null</span>){</span><br><span class="line"> redisTemplate.opsForValue().set(key,<span class="number">1</span>,seconds, TimeUnit.SECONDS);</span><br><span class="line"> }<span class="keyword">else</span>{</span><br><span class="line"> <span class="keyword">if</span>(redisCount.intValue() >= maxCount){</span><br><span class="line"> render(response,<span class="string">"次æ°è¶
è¿"</span>);</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">false</span>;</span><br><span class="line"> }</span><br><span class="line"> redisTemplate.opsForValue().increment(key);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">super</span>.preHandle(request, response, handler);</span><br><span class="line"></span><br><span class="line"> }</span><br><span class="line"> <span class="function"><span class="keyword">private</span> <span class="keyword">void</span> <span class="title">render</span><span class="params">(HttpServletResponse response, String msg)</span><span class="keyword">throws</span> Exception </span>{</span><br><span class="line"> response.setContentType(<span class="string">"application/json;charset=UTF-8"</span>);</span><br><span class="line"> OutputStream out = response.getOutputStream();</span><br><span class="line"> out.write(msg.getBytes(<span class="string">"UTF-8"</span>));
482</span><br><span class="line"> out.flush();</span><br><span class="line"> out.close();</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure> 483<p>æ³¨åæ¦æªå¨</p> 484<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Configuration</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">WebConfig</span> <span class="keyword">implements</span> <span class="title">WebMvcConfigurer</span> </span>{</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Autowired</span></span><br><span class="line"> <span class="keyword">private</span> AccessControlInterceptor interceptor;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">addInterceptors</span><span class="params">(InterceptorRegistry registry)</span> </span>{</span><br><span class="line"> registry.addInterceptor(interceptor);</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure> 485<p>使ç¨</p> 486<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@AccessControl</span>(seconds = <span class="number">60</span>,maxCount = <span class="number">1</span>)</span><br><span class="line"><span class="meta">@RequestMapping</span>(<span class="string">"register"</span>)</span><br><span class="line"><span class="function"><span class="keyword">public</span> ModelAndView <span class="title">register</span><span class="params">(User user)</span> <span class="keyword">throws</span> Exception</span>{</span><br><span class="line"> <span class="comment">//.......</span></span><br></pre></td></tr></table></figure> 487 488 489 490 </div> 491 <!-- ç¸å ³æç« æ¨è --> 492 493 494 495 496 497 498 499 500 501 502 503 <footer class="post-footer"> 504 505 506 507 508 509 510 511 512 <div class="post-eof"></div> 513 514 </footer> 515 </div> 516 517 518 519 </article> 520 521 522 523 524 525 526 527 528 529 530 531 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 532 533 534 535 <div class="post-block"> 536 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2020/05/03/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3Volatile%E5%85%B3%E9%94%AE%E5%AD%97%E5%8F%8A%E5%85%B6%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86/"> 537 538 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 539 <meta itemprop="name" content="忍"> 540 <meta itemprop="description" content=""> 541 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 542 </span> 543 544 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 545 <meta itemprop="name" content="ç®"> 546 </span> 547 548 549 <header class="post-header"> 550 551 552 553 <h1 class="post-title" itemprop="name headline"> 554 555 <a class="post-title-link" href="/2020/05/03/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3Volatile%E5%85%B3%E9%94%AE%E5%AD%97%E5%8F%8A%E5%85%B6%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86/" itemprop="url">æ·±å ¥çè§£Volatileå ³é®ååå ¶å®ç°åç</a></h1> 556 557 558 <div class="post-meta"> 559 <span class="post-time"> 560
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989åè¿äºæ°æ®ï¼ä¸å°æºå¨ä¸é¢ä¸è¬åªè¿è¡ä¸ä¸ªHRegion Serverï¼ä¸æ¯ä¸ä¸ªåºæ®µçHRegionä¹åªä¼è¢«ä¸ä¸ªHRegion Serverç»´æ¤ã</li> 990<li>HRegion Server主è¦è´è´£ååºç¨æ·I/O请æ±ï¼åHDFSæä»¶ç³»ç»ä¸è¯»åæ°æ®ï¼æ¯HBaseä¸ææ ¸å¿ç模åã</li> 991<li>HRegion Serverå é¨ç®¡çäºä¸ç³»åHRegionå¯¹è±¡ï¼æ¯ä¸ªHRegion对åºäºTableä¸çä¸ä¸ªRegionï¼Regionä¸ç±å¤ä¸ªStoreç»æãæ¯ä¸ªStore对åºäºTableä¸çä¸ä¸ªColumn Familyçåå¨ï¼å¯ä»¥çåºæ¯ä¸ªColumn Familyå ¶å®å°±æ¯ä¸ä¸ªéä¸çåå¨åå ï¼å æ¤æå¥½å°å ·å¤å ±åIOç¹æ§çcolumnæ¾å¨ä¸ä¸ªColumn Familyä¸ï¼è¿æ ·æé«æã<h6 id="HStoreâ-StoreFile"><a href="#HStoreâ-StoreFile" class="headerlink" title="HStoreâ(StoreFile)"></a>HStoreâ(StoreFile)</h6></li> 992<li>HBaseåå¨çæ ¸å¿ãç±MemStoreåStoreFileç»æãã</li> 993<li>MemStoreæ¯Sorted Memory Buffer</li> 994</ul> 995<p>Clientåå ¥ -> åå ¥MemStoreï¼ä¸ç´å°MemStore满 -> Flushæä¸ä¸ªStoreFileï¼ç´è³å¢é¿å°ä¸å®éå¼ -> 触åCompactåå¹¶æä½ -> å¤ä¸ªStoreFileåå¹¶æä¸ä¸ªStoreFileï¼åæ¶è¿è¡çæ¬åå¹¶åæ°æ®å é¤ -> å½StoreFiles Compactåï¼éæ¥å½¢æè¶æ¥è¶å¤§çStoreFile -> å个StoreFile大å°è¶ è¿ä¸å®éå¼åï¼è§¦åSplitæä½ï¼æå½åRegion Splitæ2个Regionï¼Regionä¼ä¸çº¿ï¼æ°Splitåºç2个å©åRegionä¼è¢«HMasteråé å°ç¸åºçHRegionServerä¸ï¼ä½¿å¾åå 1个Regionçååå¾ä»¥åæµå°2个Regionä¸ã</p> 996<p><img src="https://img.huyunshun.com/img/20200423162625.png" alt="20200423162625"></p> 997<p>æä»¥ï¼HBaseåªæ¯å¢å æ°æ®ï¼ææå¾æ´æ°åå 餿ä½ï¼é½æ¯å¨Compacté¶æ®µåçï¼æä»¥ï¼ç¨æ·åæä½åªéè¦è¿å ¥å°å åå³å¯ç«å³è¿åï¼ä»èä¿è¯I/O髿§è½ã</p> 998<ul> 999<li>HFileæ¯åºå±çå®ç°ã<h6 id="MemStore"><a href="#MemStore" class="headerlink" title="MemStore"></a>MemStore</h6>åç¼åï¼ç±äº HFile ä¸çæ°æ®è¦æ±æ¯æåºçï¼æä»¥æ°æ®æ¯å åå¨å¨ MemStore ä¸ï¼æå¥½åºåï¼çå°è¾¾å·åæ¶æºæä¼å·åå° HFileï¼æ¯æ¬¡å·åé½ä¼å½¢æä¸ä¸ªæ°ç HFileã<h6 id="Hlog"><a href="#Hlog" class="headerlink" title="Hlog"></a>Hlog</h6>å¨åå¸å¼ç³»ç»ç¯å¢ä¸ï¼æ æ³é¿å ç³»ç»åºéæè 宿ºï¼å æ¤ä¸æ¦HRegion Serveræå¤éåºï¼MemStoreä¸çå åæ°æ®å°ä¼ä¸¢å¤±ï¼è¿å°±éè¦å¼å ¥HLogäºãæ¯ä¸ªHRegion Serverä¸é½æä¸ä¸ªHLog对象ã</li> 1000</ul> 1001<p>æ¯ä¸ªHRegionServerä¸é½ä¼æä¸ä¸ªHLog对象ï¼HLogæ¯ä¸ä¸ªå®ç°Write Ahead Logçç±»ï¼æ¯æ¬¡ç¨æ·æä½åå ¥Memstoreçåæ¶ï¼ä¹ä¼åä¸ä»½æ°æ®å°HLogæä»¶ï¼HLogæä»¶å®æä¼æ»å¨åºæ°ï¼å¹¶å 餿§çæä»¶(å·²æä¹ åå°StoreFileä¸çæ°æ®)ãå½HRegionServeræå¤ç»æ¢åï¼HMasterä¼éè¿Zookeeperæç¥ï¼HMasteré¦å å¤çéççHLogæä»¶ï¼å°ä¸åregionçlogæ°æ®æåï¼å嫿¾å°ç¸åºregionç®å½ä¸ï¼ç¶ååå°å¤±æçregionéæ°åé ï¼é¢åå°è¿äºregionçHRegionServerå¨Load Regionçè¿ç¨ä¸ï¼ä¼åç°æåå²HLogéè¦å¤çï¼å æ¤ä¼Replay HLogä¸çæ°æ®å°MemStoreä¸ï¼ç¶åflushå°StoreFilesï¼å®ææ°æ®æ¢å¤ã</p> 1002<h6 id="Hbaseçå卿 ¼å¼"><a href="#Hbaseçå卿 ¼å¼" class="headerlink" title="Hbaseçå卿 ¼å¼"></a>Hbaseçå卿 ¼å¼</h6><p>HBaseä¸çæææ°æ®æä»¶é½åå¨å¨Hadoop HDFSæä»¶ç³»ç»ä¸ä¸ºä¾ï¼ä¸»è¦å æ¬ä¸è¿°æåºçä¸¤ç§æä»¶ç±»åï¼</p> 1003<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">HFileï¼ HBaseä¸KeyValueæ°æ®çå卿 ¼å¼ï¼HFileæ¯Hadoopçäºè¿å¶æ ¼å¼æä»¶ï¼å®é ä¸StoreFileå°±æ¯å¯¹HFileåäºè½»é级å è£ ï¼å³StoreFileåºå±å°±æ¯HFileã</span><br><span class="line">HLog Fileï¼HBaseä¸WALï¼Write Ahead Logï¼ çå卿 ¼å¼ï¼ç©ç䏿¯HadoopçSequence Fileã</span><br></pre></td></tr></table></figure> 1004<ul> 1005<li>Hbaseçå卿 ¼å¼ï¼HFileï¼*</li> 1006</ul> 1007<p><img src="https://img.huyunshun.com/img/20200423162635.png" alt="20200423162635"></p> 1008<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">HFileæä»¶ä¸å®é¿ï¼é¿åº¦åºå®çååªæä¸¤ä¸ªï¼TraileråFileInfo</span><br><span class="line">Trailer䏿éæåå ¶ä»æ°æ®åçèµ·å§ç¹</span><br><span class="line">File Infoä¸è®°å½äºæä»¶çä¸äºMetaä¿¡æ¯ï¼ä¾å¦ï¼AVG_KEY_LEN, AVG_VALUE_LEN, LAST_KEY, COMPARATOR, MAX_SEQ_ID_KEYç</span><br><span class="line">Data IndexåMeta Indexåè®°å½äºæ¯ä¸ªDataååMetaåçèµ·å§ç¹</span><br><span class="line">Data Blockæ¯HBase I/
1008Oçåºæ¬åå ï¼ä¸ºäºæé«æçï¼HRegionServer䏿åºäºLRUçBlock Cacheæºå¶</span><br><span class="line">æ¯ä¸ªDataåç大å°å¯ä»¥å¨å建ä¸ä¸ªTableçæ¶åéè¿åæ°æå®ï¼å¤§å·çBlockæå©äºé¡ºåºScanï¼å°å·Blockå©äºéæºæ¥è¯¢</span><br><span class="line">æ¯ä¸ªDataåé¤äºå¼å¤´çMagic以å¤å°±æ¯ä¸ä¸ªä¸ªKeyValueå¯¹æ¼æ¥èæ, Magicå 容就æ¯ä¸äºéæºæ°åï¼ç®çæ¯é²æ¢æ°æ®æå</span><br><span class="line"></span><br><span class="line">HFileéé¢çæ¯ä¸ªKeyValue对就æ¯ä¸ä¸ªç®åçbyteæ°ç»ãè¿ä¸ªbyteæ°ç»éé¢å å«äºå¾å¤é¡¹ï¼å¹¶ä¸æåºå®çç»æã</span><br></pre></td></tr></table></figure> 1009<p><img src="https://img.huyunshun.com/img/20200423162645.png" alt="20200423162645"></p> 1010<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">KeyLengthåValueLengthï¼ä¸¤ä¸ªåºå®çé¿åº¦ï¼åå«ä»£è¡¨KeyåValueçé¿åº¦</span><br><span class="line">Keyé¨åï¼Row Lengthæ¯åºå®é¿åº¦çæ°å¼ï¼è¡¨ç¤ºRowKeyçé¿åº¦ï¼Row å°±æ¯RowKey</span><br><span class="line">Column Family Lengthæ¯åºå®é¿åº¦çæ°å¼ï¼è¡¨ç¤ºFamilyçé¿åº¦</span><br><span class="line">æ¥çå°±æ¯Column Familyï¼åæ¥çæ¯Qualifierï¼ç¶åæ¯ä¸¤ä¸ªåºå®é¿åº¦çæ°å¼ï¼è¡¨ç¤ºTime StampåKey Typeï¼Put/Deleteï¼</span><br><span class="line">Valueé¨å没æè¿ä¹å¤æçç»æï¼å°±æ¯çº¯ç²¹çäºè¿å¶æ°æ®</span><br></pre></td></tr></table></figure> 1011 1012<ul> 1013<li>Hbaseçå卿 ¼å¼ï¼HLog Fileï¼*</li> 1014</ul> 1015<p><img src="https://img.huyunshun.com/img/20200423162657.png" alt="20200423162657"></p> 1016<p>ããHLogæä»¶å°±æ¯ä¸ä¸ªæ®éçHadoop Sequence Fileï¼Sequence File çKeyæ¯HLogKey对象ï¼HLogKeyä¸è®°å½äºåå ¥æ°æ®çå½å±ä¿¡æ¯ï¼é¤äºtableåregionååå¤ï¼åæ¶è¿å æ¬ sequence numberåtimestampï¼timestampæ¯âåå ¥æ¶é´âï¼sequence numberçèµ·å§å¼ä¸º0ï¼æè æ¯æè¿ä¸æ¬¡åå ¥æä»¶ç³»ç»ä¸sequence numberã</p> 1017<p>ããHLog Sequece FileçValueæ¯HBaseçKeyValue对象ï¼å³å¯¹åºHFileä¸çKeyValue</p> 1018<h6 id="ROOT表åMETA表"><a href="#ROOT表åMETA表" class="headerlink" title="ROOT表åMETA表"></a>ROOT表åMETA表</h6><p>ç¨æ·è¡¨çRegionså æ°æ®è¢«åå¨å¨.META.表ä¸ï¼éçRegionçå¢å¤ï¼.META.表ä¸çæ°æ®ä¹ä¼å¢å¤§ï¼å¹¶åè£æå¤ä¸ªRegionsã为äºå®ä½.META.表ä¸å个Regionsçä½ç½®ï¼æ.META.è¡¨ä¸ææRegionsçå æ°æ®ä¿åå¨-ROOT-表ä¸ï¼æåç±ZooKeeperè®°å½-ROOT-表çä½ç½®ä¿¡æ¯ãææå®¢æ·ç«¯è®¿é®ç¨æ·æ°æ®åï¼éè¦é¦å 访é®ZooKeeperè·å¾-ROOT-çä½ç½®ï¼ç¶å访é®-ROOT-表è·å¾.META.表çä½ç½®ï¼æåæ ¹æ®.META.表ä¸çä¿¡æ¯ç¡®å®ç¨æ·æ°æ®åæ¾çä½ç½®ï¼å¦ä¸å¾æç¤ºã</p> 1019<p><img src="https://img.huyunshun.com/img/20200423162706.png" alt="20200423162706"></p> 1020<p>ROOT 表永è¿ä¸ä¼è¢«åå²ï¼å®åªæä¸ä¸ªRegionï¼è¿æ ·å¯ä»¥ä¿è¯æå¤éè¦ä¸æ¬¡è·³è½¬å°±å¯ä»¥å®ä½ä»»æä¸ä¸ªRegionã为äºå 快访é®é度ï¼.META.表çRegionså ¨é¨ä¿åå¨å åä¸ã客æ·ç«¯ä¼å°æ¥è¯¢è¿çä½ç½®ä¿¡æ¯ç¼åèµ·æ¥ï¼ä¸ç¼åä¸ä¼ä¸»å¨å¤±æã妿客æ·ç«¯æ ¹æ®ç¼åä¿¡æ¯è¿è®¿é®ä¸å°æ°æ®ï¼å询é®åªæç¸å ³.META.表çRegionæå¡å¨ï¼è¯å¾è·åæ°æ®çä½ç½®ï¼å¦æè¿æ¯å¤±è´¥ï¼å询é®-ROOT-表ç¸å ³ç.META.表å¨åªéãæåï¼å¦æåé¢çä¿¡æ¯å ¨é¨å¤±æï¼åéè¿ZooKeeperéæ°å®ä½Regionçä¿¡æ¯ãæä»¥å¦æå®¢æ·ç«¯ä¸çç¼åå ¨é¨æ¯å¤±æï¼åéè¦è¿è¡6次ç½ç»æ¥åï¼æè½å®ä½å°æ£ç¡®çRegionã</p> 1021<p><img src="https://img.huyunshun.com/img/20200423162716.png" alt="20200423162716"></p> 1022<h6 id="MapReduce-On-HBase"><a href="#MapReduce-On-HBase" class="headerlink" title="MapReduce On HBase"></a>MapReduce On HBase</h6><p>å¨HBaseç³»ç»ä¸è¿è¡æ¹å¤çè¿ç®ï¼ææ¹ä¾¿åå®ç¨ç模åä¾ç¶æ¯MapReduceï¼å¦ä¸å¾ï¼</p> 1023<p><img src="https://img.huyunshun.com/img/20200423162725.png" alt="20200423162725"></p> 1024<p>HBase TableåRegionçå ³ç³»ï¼æ¯è¾ç±»ä¼¼HDFS FileåBlockçå ³ç³»ï¼HBaseæä¾äºé å¥çTableInputFormatåTableOutputFormat APIï¼å¯ä»¥æ¹ä¾¿çå°HBase Tableä½ä¸ºHadoop MapReduceçSourceåSinkï¼
1024对äºMapReduce Jobåºç¨å¼åäººåæ¥è¯´ï¼åºæ¬ä¸éè¦å ³æ³¨HBaseç³»ç»èªèº«çç»èã</p> 1025<h5 id="åæµç¨"><a href="#åæµç¨" class="headerlink" title="åæµç¨"></a>åæµç¨</h5><p><img src="https://img.huyunshun.com/img/20200423162734.png" alt="20200423162734"></p> 1026<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">1ï¼Client å è®¿é® zookeeperï¼è·å hbase:meta 表ä½äºåªä¸ª Region Serverã </span><br><span class="line">2ï¼è®¿é®å¯¹åºç Region Serverï¼è·å hbase:meta è¡¨ï¼æ ¹æ®è¯»è¯·æ±ç namespace:table/rowkeyï¼æ¥è¯¢åºç®æ æ°æ®ä½äºåªä¸ª Region Server ä¸çåªä¸ª Region ä¸ãå¹¶å°è¯¥ table ç region ä¿¡æ¯ä»¥å meta 表çä½ç½®ä¿¡æ¯ç¼åå¨å®¢æ·ç«¯ç meta cacheï¼æ¹ä¾¿ä¸æ¬¡è®¿é®ã</span><br><span class="line">3ï¼ä¸ç®æ Region Server è¿è¡é讯ï¼</span><br><span class="line">4ï¼å°æ°æ®é¡ºåºåå ¥ï¼è¿½å ï¼å° WALï¼ </span><br><span class="line">5ï¼å°æ°æ®åå ¥å¯¹åºç MemStoreï¼æ°æ®ä¼å¨ MemStore è¿è¡æåºï¼ </span><br><span class="line">6ï¼å客æ·ç«¯åé ackï¼ </span><br><span class="line">7ï¼çè¾¾å° MemStore çå·åæ¶æºåï¼å°æ°æ®å·åå° HFileã</span><br></pre></td></tr></table></figure> 1027<h5 id="MemStore-Flush"><a href="#MemStore-Flush" class="headerlink" title="MemStore Flush"></a>MemStore Flush</h5><p><img src="https://img.huyunshun.com/img/20200423162743.png" alt="20200423162743"></p> 1028<p>MemStore å·åæ¶æºï¼</p> 1029<p>1.å½æä¸ª memstroe ç大å°è¾¾å°äº hbase.hregion.memstore.flush.sizeï¼é»è®¤å¼ 128Mï¼ï¼ å ¶æå¨ region çææ memstore é½ä¼å·åã </p> 1030<p>** å½ memstore ç大å°è¾¾å°äºhbase.hregion.memstore.flush.sizeï¼é»è®¤å¼ 128Mï¼ â hbase.hregion.memstore.block.multiplierï¼é»è®¤å¼ 4ï¼æ¶ **ï¼ä¼é»æ¢ç»§ç»å¾è¯¥ memstore åæ°æ®ã</p> 1031<p>2.å½ region server ä¸ memstore çæ»å¤§å°è¾¾å°** java_heapsizeâhbase.regionserver.global.memstore.sizeï¼é»è®¤å¼ 0.4ï¼âhbase.regionserver.global.memstore.size.lower.limitï¼é»è®¤å¼ 0.95ï¼ **ï¼region ä¼æç §å ¶ææ memstore ç大å°é¡ºåºï¼ç±å¤§å°å°ï¼ä¾æ¬¡è¿è¡å·åã</p> 1032<p>ç´å° region server䏿æ memstore çæ»å¤§å°åå°å°ä¸è¿°å¼ä»¥ä¸ã å½ region server ä¸ memstore çæ»å¤§å°è¾¾å°<strong>java_heapsizeâhbase.regionserver.global.memstore.size</strong>ï¼é»è®¤å¼ 0.4ï¼æ¶ï¼ä¼é»æ¢ç»§ç»å¾ææç memstore åæ°æ®ã</p> 1033<ol start="3"> 1034<li>å°è¾¾èªå¨å·åçæ¶é´ï¼ä¹ä¼è§¦å memstore flushãèªå¨å·æ°çæ¶é´é´éç±è¯¥å±æ§è¿è¡é ç½® hbase.regionserver.optionalcacheflushintervalï¼é»è®¤ 1 å°æ¶ï¼ã</li> 1035</ol> 1036<p>4.å½ WAL æä»¶çæ°éè¶ è¿ hbase.regionserver.max.logsï¼region ä¼æç §æ¶é´é¡ºåºä¾æ¬¡è¿è¡å·åï¼ç´å° WAL æä»¶æ°éåå°å° hbase.regionserver.max.log 以ä¸ï¼è¯¥å±æ§åå·²ç»åºå¼ï¼ç°æ éæå¨è®¾ç½®ï¼æå¤§å¼ä¸º 32ï¼ã</p> 1037<h5 id="读æµç¨"><a href="#读æµç¨" class="headerlink" title="读æµç¨"></a>读æµç¨</h5><p><img src="https://img.huyunshun.com/img/20200423162755.png" alt="20200423162755"></p> 1038<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">1ï¼Client å è®¿é® zookeeperï¼è·å hbase:meta 表ä½äºåªä¸ª Region Serverã</span><br><span class="line">2ï¼è®¿é®å¯¹åºç Region Serverï¼è·å hbase:meta è¡¨ï¼æ ¹æ®è¯»è¯·æ±ç namespace:table/rowkeyï¼æ¥è¯¢åºç®æ æ°æ®ä½äºåªä¸ª Region Server ä¸çåªä¸ª Region ä¸ãå¹¶å°è¯¥ table ç region ä¿¡æ¯ä»¥å meta 表çä½ç½®ä¿¡æ¯ç¼åå¨å®¢æ·ç«¯ç meta cacheï¼æ¹ä¾¿ä¸æ¬¡è®¿é®ã</span><br><span class="line">3ï¼ä¸ç®æ Region Server è¿è¡é讯ï¼</span><br><span class="line">4ï¼åå«å¨ Block Cacheï¼è¯»ç¼åï¼ï¼MemStore å Store Fileï¼HFileï¼ä¸æ¥è¯¢ç®æ æ°æ®ï¼å¹¶å°æ¥å°çæææ°æ®è¿è¡åå¹¶ãæ¤å¤æææ°æ®æ¯æå䏿¡æ°æ®çä¸åçæ¬ï¼time stampï¼æè ä¸åçç±»åï¼Put/Deleteï¼ã</span><br><span class="line">5ï¼ å°ä»æä»¶ä¸æ¥è¯¢å°çæ°æ®åï¼Blockï¼HFile æ°æ®åå¨åå ï¼é»è®¤å¤§å°ä¸º 64KBï¼ç¼åå°Block Cacheã 6ï¼å°åå¹¶åçæç»ç»æè¿åç»å®¢æ·ç«¯ã</span><br></pre></td></tr></table></figure> 1039<h5 id="StoreFile-Compaction"><a href="#StoreFile-Compaction" class="headerlink" title="StoreFile Compaction"></a>StoreFile Compaction</h5><p>ç±äºmemstoreæ¯æ¬¡å·åé½ä¼çæä¸ä¸ªæ°çHFileï¼ä¸åä¸ä¸ªå段çä¸åçæ¬ï¼timestampï¼åä¸åç±»åï¼Put/Deleteï¼æå¯è½ä¼åå¸å¨ä¸åç HFile ä¸ï¼
1039å æ¤æ¥è¯¢æ¶éè¦éåææç HFileã为äºåå° HFile ç个æ°ï¼ä»¥åæ¸ çæè¿æåå é¤çæ°æ®ï¼ä¼è¿è¡ StoreFile Compactionã</p> 1040<p>Compaction å为两ç§ï¼å嫿¯ Minor Compaction å Major CompactionãMinor Compactionä¼å°ä¸´è¿çè¥å¹²ä¸ªè¾å°ç HFile åå¹¶æä¸ä¸ªè¾å¤§ç HFileï¼ä½ä¸ä¼æ¸ çè¿æåå é¤çæ°æ®ã</p> 1041<p>Major Compaction ä¼å°ä¸ä¸ª Store ä¸çææç HFile åå¹¶æä¸ä¸ªå¤§ HFileï¼å¹¶ä¸ä¼æ¸ çæè¿æåå é¤çæ°æ®</p> 1042<p><img src="https://img.huyunshun.com/img/20200423162804.png" alt="20200423162804"></p> 1043<h5 id="Region-Split"><a href="#Region-Split" class="headerlink" title="Region Split"></a>Region Split</h5><p>é»è®¤æ åµä¸ï¼æ¯ä¸ª Table èµ·ååªæä¸ä¸ª Regionï¼éçæ°æ®ç䏿åå ¥ï¼Region ä¼èªå¨è¿è¡æåãåæåæ¶ï¼ä¸¤ä¸ªå Region é½ä½äºå½åç Region Serverï¼ä½å¤äºè´è½½åè¡¡çèèï¼HMaster æå¯è½ä¼å°æä¸ª Region 转移ç»å ¶ä»ç Region Serverã</p> 1044<p>Region Split æ¶æºï¼</p> 1045<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">1.å½1个regionä¸çæä¸ªStore䏿æStoreFileçæ»å¤§å°è¶ è¿hbase.hregion.max.filesizeï¼ è¯¥ Region å°±ä¼è¿è¡æåï¼0.94 çæ¬ä¹åï¼ã</span><br><span class="line">2. å½ 1 个 region ä¸ ç æ 个 Store 䏿æ StoreFile ç æ» 大 å° è¶ è¿ Min(R^2 * "hbase.hregion.memstore.flush.size",hbase.hregion.max.filesize")ï¼è¯¥ Region å°±ä¼è¿è¡æåï¼å ¶ä¸ R 为å½å Region Server ä¸å±äºè¯¥ Table ç个æ°ï¼0.94 çæ¬ä¹åï¼ã</span><br></pre></td></tr></table></figure> 1046<p><img src="https://img.huyunshun.com/img/20200423162817.png" alt="20200423162817"></p> 1047<h4 id="å®è£ "><a href="#å®è£ " class="headerlink" title="å®è£ "></a>å®è£ </h4><p>1ãdockerå®è£ </p> 1048<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line">docker run -d -h docker-hbase \</span><br><span class="line"> -p 2181:2181 \</span><br><span class="line"> -p 8081:8080 \</span><br><span class="line"> -p 8085:8085 \</span><br><span class="line"> -p 9090:9090 \</span><br><span class="line">
1048 -p 9000:9000 \</span><br><span class="line"> -p 9095:9095 \</span><br><span class="line"> -p 16000:16000 \</span><br><span class="line"> -p 16010:16010 \</span><br><span class="line"> -p 16201:16201 \</span><br><span class="line"> -p 16301:16301 \</span><br><span class="line"> -p 16020:16020\</span><br><span class="line"> --name hbase \</span><br><span class="line"> harisekhon/hbase</span><br><span class="line"></span><br><span class="line">-d 表示åå°è¿è¡</span><br><span class="line">-h 该容å¨çhost为docker-hbase</span><br><span class="line">-p 宿主æºç«¯å£:容å¨ç«¯å£</span><br><span class="line">--name 该容å¨çåå</span><br></pre></td></tr></table></figure> 1049<p>å¯å¨æåï¼è®¿é®webçé¢ã</p> 1050<p><img src="https://img.huyunshun.com/img/20200423162835.png" alt="20200423162835"></p> 1051<p>è¿å ¥å®¹å¨å¯ä»¥çå°hbaseæ£å¸¸</p> 1052<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos ~]# docker exec -it 6a /bin/bash</span><br><span class="line">bash-4.4# hbase shell</span><br><span class="line">2020-01-08 10:13:42,496 WARN [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br><span class="line">HBase Shell</span><br><span class="line">Use "help" to get list of supported commands.</span><br><span class="line">Use "exit" to quit this interactive shell.</span><br><span class="line">For Reference, please visit: http://hbase.apache.org/2.0/book.html#shell</span><br><span class="line">Version 2.1.3, rda5ec9e4c06c537213883cca8f3cc9a7c19daf67, Mon Feb 11 15:45:33 CST 2019</span><br></pre></td></tr></table></figure> 1053<p>2ãé群æå»º</p> 1054<p>3ãå¸¸ç¨æä½å½ä»¤</p> 1055<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line">æ¥çéç¾¤ç¶æstatus</span><br><span class="line"></span><br><span class="line">æ¥çhbaseçæ¬version</span><br><span class="line"></span><br><span class="line">æ¥çææè¡¨list</span><br><span class="line"></span><br><span class="line">å建表 create 't1','[Column Family 1]','[Column Family 2]'</span><br><span class="line"></span><br><span class="line">ä¾å¦å建ä¸ä¸ªè谱表ï¼è°å³æä¸ºä¸ä¸ªåæ(ç±»)ï¼é£æå为å¦ä¸ä¸ªåæ(ç±»)ï¼èæ¬ä¸ºcreate 'cookbook','seasoning','ngredients'</span><br><span class="line"></span><br><span class="line">æ¥ç表çç»ædescribe 't1'</span><br><span class="line">å é¤è¡¨</span><br><span class="line">disable 't1' ä¹å drop 't1'</span><br><span class="line">æ£æ¥è¡¨æ¯å¦åå¨exists 't1'</span><br><span class="line">è·åè¡¨ä¸æææ°æ®scan 't1'</span><br><span class="line">-è·å表ä¸å10è¡æ°æ®scan 't1',{LIMIT=>10}</span><br><span class="line">è·åæå®column(ad:pv)çå10è¡æ°æ®scan 't1',{COLUMNS=>['ad:pv'],LIMIT=>10}</span><br><span class="line">å Filterï¼å¦è¿æ»¤rowkey以â2015âå¼å¤´çå10è¡æ°æ® scan 't1',{FILTER=>"PrefixFilter('2015')",LIMIT=>10}</span><br><span class="line">æ¥è¯¢rowkey=001䏿æçæ°æ®get 't1','001'</span><br><span class="line">æ¥è¯¢rowkey=001ä¸family=ad,column=pvget 't1','001','ad:pv' æè get 't1','001',{COLUMN=>'ad:pv'}</span><br><span class="line">æ·»å æ°æ®put <table>,<rowkey>,<family:column>,<value>,<timestamp></span><br><span class="line">ä¾å¦ï¼åât1âè¡¨ä¸æ·»å rowkey=002,family=ad,column=pv,value=1000,æ¶é´æ³é»è®¤</span><br><span class="line">put 't1','002','ad:pv','1000'</span><br><span class="line"></span><br><span class="line">å é¤rowkey=002çæææ°æ®deleteall 't1','002'</span><br><span class="line">å é¤rowkey=002ä¸ad:pvæ°æ®delete 't1','002','ad:pv'</span><br><span class="line">æ¸ ç©ºè¡¨truncate 't1'</span><br><span class="line">ç»è®¡è¡æ°count 't1'</span><br><span class="line">æ¥è¯¢è¡¨t1ä¸çè¡æ°ï¼æ¯100æ¡æ¾ç¤ºä¸æ¬¡count 't1',{INTERVAL=>100}</span><br></pre></td></tr></table></figure> 1056 1057<p>éå½ï¼Hbaseé»è®¤ç«¯å£</p> 1058<p><img src="https://img.huyunshun.com/img/20200423162851.png" alt="20200423162851"></p> 1059 1060 1061 1062 1063 </div> 1064 <!-- ç¸å ³æç« æ¨è --> 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 <footer class="post-footer"> 1077 1078 1079 1080 1081 1082 1083 1084 1085 <div class="post-eof"></div> 1086 1087 </footer> 1088 </div> 1089 1090 1091 1092 </article> 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 1105 1106 1107 1108 <div class="post-block"> 1109 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2019/12/23/Hadoop%E5%AE%89%E8%A3%85%E5%92%8C%E9%85%8D%E7%BD%AE/"> 1110 1111 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 1112 <meta itemprop="name" content="忍"> 1113 <meta itemprop="description" content=""> 1114 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 1115 </span> 1116 1117 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 1118 <meta itemprop="name" content="ç®"> 1119 </span> 1120 1121 1122 <header class="post-header"> 1123 1124 1125 1126 <h1 class="post-title" itemprop="name headline"> 1127 1128 <a class="post-title-link" href="/2019/12/23/Hadoop%E5%AE%89%E8%A3%85%E5%92%8C%E9%85%8D%E7%BD%AE/" itemprop="url">Hadoopå®è£ åé ç½®å使ç¨ä»ç»</a></h1> 1129 1130 1131 <div class="post-meta">
1132 <span class="post-time"> 1133 1134 <span class="post-meta-item-icon"> 1135 <i class="fa fa-calendar-o"></i> 1136 </span> 1137 1138 <span class="post-meta-item-text">å表äº</span> 1139 1140 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2019-12-23T16:23:32+08:00"> 1141 2019-12-23 1142 </time> 1143 1144 1145 1146 1147 1148 </span> 1149 1150 1151 <span class="post-category" > 1152 1153 <span class="post-meta-divider">|</span> 1154 1155 <span class="post-meta-item-icon"> 1156 <i class="fa fa-folder-o"></i> 1157 </span> 1158 1159 <span class="post-meta-item-text">åç±»äº</span> 1160 1161 1162 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 1163 <a href="/categories/Hadoop/" itemprop="url" rel="index"> 1164 <span itemprop="name">Hadoop</span> 1165 </a> 1166 </span> 1167 1168 1169 1170 1171 </span> 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 </div> 1188 </header> 1189 1190 1191 1192 1193 1194 <div class="post-body" itemprop="articleBody"> 1195 1196 1197 1198 1199 1200 1201 1202 <p>ç±äºHadoopæ¯åºäºJavaå¼åï¼æä»¥é¦éå¨Linuxä¸å®è£ 好Javaç¯å¢ã</p> 1203<h4 id="1ãHadoopçä¸è½½å®è£ "><a href="#1ãHadoopçä¸è½½å®è£ " class="headerlink" title="1ãHadoopçä¸è½½å®è£ "></a>1ãHadoopçä¸è½½å®è£ </h4><p>ä¸è½½å å°/usr/local</p> 1204<p>è§£åï¼tar -zxvf /usr/local/hadoop-3.1.2.tar.gz -C /usr/local</p> 1205<p>æ·»å ç¯å¢åévim /etc/profile</p> 1206<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">export HADOOP_HOME=/usr/local/hadoop-3.1.2</span><br><span class="line">export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native</span><br><span class="line">export PATH=$PATH:$HADOOP_HOME/sbin</span><br><span class="line">export PATH=$PATH:$HADOOP_HOME/bin</span><br></pre></td></tr></table></figure> 1207<p>source /etc/profile</p> 1208<p>æ§è¡æµè¯ï¼hadoop version</p> 1209<h4 id="2ãç®å½ç»æ"><a href="#2ãç®å½ç»æ" class="headerlink" title="2ãç®å½ç»æ"></a>2ãç®å½ç»æ</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">binç®å½ï¼åæ¾å¯¹Hadoopç¸å ³æå¡ï¼HDFS,YARNï¼è¿è¡æä½çèæ¬</span><br><span class="line">etcç®å½ï¼Hadoopçé ç½®æä»¶ç®å½ï¼åæ¾Hadoopçé ç½®æä»¶</span><br><span class="line">libç®å½ï¼åæ¾Hadoopçæ¬å°åºï¼å¯¹æ°æ®è¿è¡å缩解å缩åè½ï¼</span><br><span class="line">sbinç®å½ï¼åæ¾å¯å¨æåæ¢Hadoopç¸å ³æå¡çèæ¬</span><br><span class="line">shareç®å½ï¼åæ¾Hadoopçä¾èµjarå ãææ¡£ãå宿¹æ¡ä¾</span><br></pre></td></tr></table></figure> 1210 1211<p>Hadoopè¿è¡æ¨¡å¼å æ¬ï¼æ¬å°æ¨¡å¼ã伪åå¸å¼æ¨¡å¼ä»¥åå®å ¨åå¸å¼æ¨¡å¼ã</p> 1212<h4 id="3ãæ¬å°è¿è¡æ¨¡å¼ï¼åæºæ¨¡å¼ï¼"><a href="#3ãæ¬å°è¿è¡æ¨¡å¼ï¼åæºæ¨¡å¼ï¼" class="headerlink" title="3ãæ¬å°è¿è¡æ¨¡å¼ï¼åæºæ¨¡å¼ï¼"></a>3ãæ¬å°è¿è¡æ¨¡å¼ï¼åæºæ¨¡å¼ï¼</h4><h6 id="3-1ã宿¹Grepæ¡ä¾"><a href="#3-1ã宿¹Grepæ¡ä¾" class="headerlink" title="3.1ã宿¹Grepæ¡ä¾"></a>3.1ã宿¹Grepæ¡ä¾</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">å建å¨hadoop-2.7.2æä»¶ä¸é¢å建ä¸ä¸ªinputæä»¶å¤¹</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# mkdir input</span><br><span class="line">å°Hadoopçxmlé ç½®æä»¶å¤å¶å°input</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# cp etc/hadoop/*.xml input</span><br><span class="line">æ§è¡shareç®å½ä¸çMapReduceç¨åº(ç»è®¡ç¬¦åå颿£åå¼çè¯)</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar grep input output 'dfs[a-z.]+'</span><br><span class="line">æ¥çè¾åºç»æ</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# cat output/*</span><br><span class="line">1 dfsadmin</span><br></pre></td></tr></table></figure> 1213<h6 id="3-2ã宿¹WordCountæ¡ä¾"><a href="#3-2ã宿¹WordCountæ¡ä¾" class="headerlink" title="3.2ã宿¹WordCountæ¡ä¾ *"></a>3.2ã宿¹WordCountæ¡ä¾ *</h6><p>ç»è®¡åè¯æ°</p> 1214<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line">建ç«è¾å ¥ç®å½åæä»¶ï¼å¹¶ä¸åå ¥æµè¯å 容</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# mkdir wcinput</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# cd wcinput</span><br><span class="line">[root@VM_0_3_centos wcinput]# vim wc.input</span><br><span class="line">[root@VM_0_3_centos wcinput]# cat wc.input</span><br><span class="line">hadoop yarn</span><br><span class="line">hadoop mapreduce</span><br><span class="line">
1214huyun</span><br><span class="line">huyun</span><br><span class="line"></span><br><span class="line">æ§è¡ç»è®¡ç¨åº</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar wordcount wcinput wcoutput</span><br><span class="line">æ¥çç»æ</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# cat wcoutput/*</span><br><span class="line">hadoop 2</span><br><span class="line">huyun 2</span><br><span class="line">mapreduce 1</span><br><span class="line">yarn 1</span><br></pre></td></tr></table></figure> 1215<h4 id="3ã伪åå¸å¼è¿è¡æ¨¡å¼"><a href="#3ã伪åå¸å¼è¿è¡æ¨¡å¼" class="headerlink" title="3ã伪åå¸å¼è¿è¡æ¨¡å¼"></a>3ã伪åå¸å¼è¿è¡æ¨¡å¼</h4><h6 id="3-1ãå¯å¨HDFSå¹¶è¿è¡MapReduceç¨åº"><a href="#3-1ãå¯å¨HDFSå¹¶è¿è¡MapReduceç¨åº" class="headerlink" title="3.1ãå¯å¨HDFSå¹¶è¿è¡MapReduceç¨åº"></a>3.1ãå¯å¨HDFSå¹¶è¿è¡MapReduceç¨åº</h6><p>** é ç½®é群 **<br>é ç½®ï¼hadoop-env.sh</p> 1216<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">vim etc/hadoop/hadoop-env.sh</span><br><span class="line">ä¿®æ¹JAVA_HOME è·¯å¾ï¼export JAVA_HOME=</span><br></pre></td></tr></table></figure> 1217<p>é ç½®ï¼core-site.xml</p> 1218<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# vim etc/hadoop/core-site.xml</span><br><span class="line"></span><br><span class="line"><configuration></span><br><span class="line"> <!-- æå®HDFSä¸NameNodeçå°å --></span><br><span class="line"> <property></span><br><span class="line"> <name>fs.defaultFS</name></span><br><span class="line"> <value>hdfs://localhost:9000</value></span><br><span class="line"> </property></span><br><span class="line"></span><br><span class="line"> <!-- æå®Hadoopè¿è¡æ¶äº§çæä»¶çåå¨ç®å½ --></span><br><span class="line"> <property></span><br><span class="line"> <name>hadoop.tmp.dir</name></span><br><span class="line"> <value>/usr/local/hadoop-3.1.2/data/tmp</value></span><br><span class="line"> </property></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></configuration></span><br></pre></td></tr></table></figure> 1219<p>HDFS core-site.xml åæ°é ç½®</p> 1220<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">â fs.default.name</span><br><span class="line">â æä»¶ç³»ç»çååãé常æ¯NameNodeçhostnameä¸port</sp
1220an><br><span class="line">â éè¦å¨æ¯ä¸ä¸ªéè¦è®¿é®éç¾¤çæºå¨ä¸æå®ï¼å æ¬é群ä¸çèç¹ </span><br><span class="line">â ä¾å¦ï¼hdfs://<your_namenode>:9000/</span><br><span class="line"></span><br><span class="line">â fs.checkpoint.dir</span><br><span class="line">â 以éå·åéçæä»¶å¤¹å表ï¼SecondNameNodeç¨æ¥åå¨checkpoint imageæä»¶ </span><br><span class="line">â 妿å¤äºä¸ä¸ªæä»¶å¤¹ï¼é£ä¹é½ä¼è¢«åå ¥æ°æ® </span><br><span class="line">â éè¦å¨SecondNameNodeä¸è®¾å®</span><br><span class="line">â é»è®¤å¼ï¼${hadoop.tmp.dir}/dfs/namesecondary</span><br><span class="line"></span><br><span class="line">â hadoop.tmp.dir</span><br><span class="line">â HDFS䏿¬å°ç£ççä¸´æ¶æä»¶ </span><br><span class="line">é»è®¤æ¯/tmp/hadoop-${user.name}.éè¦å¨ææçèç¹ä¸è®¾å®</span><br><span class="line"></span><br><span class="line">â fs.trash.interval</span><br><span class="line">â å½ä¸ä¸ªæä»¶è¢«å æåï¼å®ä¼è¢«æ¾å°ç¨æ·ç®å½ç.Trashç®å½ä¸ï¼è䏿¯ç«å³å æ </span><br><span class="line">â ç»è¿æ¤åæ°è®¾ç½®çåéæ°ä¹åï¼åå ææ°æ® </span><br><span class="line">â é»è®¤æ¯0ï¼ç¦ç¨æ¤åè½ï¼å»ºè®®1440ï¼ä¸å¤©ï¼</span><br><span class="line"></span><br><span class="line">â io.file.buffer.size</span><br><span class="line">â 设å®å¨è¯»åæ°æ®æ¶çç¼å大å°ï¼åºè¯¥ä¸ºç¡¬ä»¶å页大å°ç2å </span><br><span class="line">â é»è®¤æ¯4096ï¼å»ºè®®ä¸º65536 ï¼ 64Kï¼ </span><br><span class="line"></span><br><span class="line">â hadoop.logfile.size</span><br><span class="line">â hadoop.logfile.count</span><br><span class="line">â 设置logæä»¶ç大å°åæ°é</span><br></pre></td></tr></table></figure> 1221<p>é ç½®ï¼hdfs-site.xml</p> 1222<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">vim etc/hadoop/hdfs-site.xml</span><br><span class="line"></span><br><span class="line"><!-- æå®HDFS坿¬çæ°é --></span><br><span class="line"><property></span><br><span class="line"> <name>dfs.replication</name></span><br><span class="line"> <value>1</value></span><br><span class="line"></property></span><br></pre></td></tr></table></figure> 1223<p>HDFS hdfs-site.xml åæ°é ç½®</p> 1224<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line">â dfs.name.dir</span><br><span class="line">â NameNode å æ°æ®åæ¾ä½ç½®</span><br><span class="line">â é»è®¤å¼ï¼ä½¿ç¨core-site.xmlä¸çhadoop.tmp.dir/dfs/name</span><br><span class="line"></span><br><span class="line">â dfs.block.size</span><br><span class="line">
1224â å¯¹äºæ°æä»¶ååç大å°ï¼åä½byteãé»è®¤æ¯64M,建议æ¯128Mãæ¯ä¸ä¸ªèç¹é½è¦æå®ï¼å æ¬å®¢æ·ç«¯ã</span><br><span class="line">â é»è®¤å¼ï¼67108864</span><br><span class="line"></span><br><span class="line">â dfs.data.dir</span><br><span class="line">â DataNode卿¬å°ç£çåæ¾blockçä½ç½®ï¼å¯ä»¥æ¯ä»¥éå·åéçç®å½å表ï¼DataNode循ç¯åç£çä¸åå ¥æ°æ®ï¼æ¯ä¸ªDataNodeå¯åç¬æå®ä¸å ¶å®DataNodeä¸ä¸æ ·</span><br><span class="line">â é»è®¤å¼ï¼${hadoop.tmp.dir}/dfs/data</span><br><span class="line"></span><br><span class="line">â dfs.namenode.handler.count</span><br><span class="line">â NameNodeç¨æ¥å¤çæ¥èªDataNodeçRPC请æ±ççº¿ç¨æ°é </span><br><span class="line">â 建议设置为DataNodeæ°éç10%ï¼ä¸è¬å¨10~200个ä¹é´ </span><br><span class="line">â å¦è®¾ç½®å¤ªå°ï¼DataNodeå¨ä¼ è¾æ°æ®çæ¶åæ¥å¿ä¸ä¼æ¥åâconnecton refused"ä¿¡æ¯ </span><br><span class="line">â å¨NameNodeä¸è®¾å®</span><br><span class="line">â é»è®¤å¼ï¼10</span><br><span class="line"></span><br><span class="line">â dfs.datanode.handler.count</span><br><span class="line">â DataNodeç¨æ¥è¿æ¥NameNodeçRPC请æ±ççº¿ç¨æ°é</span><br><span class="line">â åå³äºç³»ç»çç¹å¿ç¨åº¦ </span><br><span class="line">â 设置太å°ä¼å¯¼è´æ§è½ä¸éçè³æ¥é</span><br><span class="line">â å¨DataNodeä¸è®¾å®</span><br><span class="line">â é»è®¤å¼ï¼3</span><br><span class="line"></span><br><span class="line">â dfs.datanode.max.xcievers</span><br><span class="line">â DataNodeå¯ä»¥åæ¶å¤ççæ°æ®ä¼ è¾è¿æ¥æ° </span><br><span class="line">â é»è®¤å¼ï¼256</span><br><span class="line">â 建议å¼ï¼4096</span><br><span class="line"></span><br><span class="line">â dfs.permissions</span><br><span class="line">â 妿æ¯trueåæ£æ¥æéï¼å¦å䏿£æ¥ï¼æ¯ä¸ä¸ªäººé½å¯ä»¥ååæä»¶ï¼ </span><br><span class="line">â äºNameNodeä¸è®¾å®</span><br><span class="line">â é»è®¤å¼ï¼true</span><br><span class="line"></span><br><span class="line">â dfs.datanode.du.reserved</span><br><span class="line">â 卿¯ä¸ªå·ä¸é¢HDFSä¸è½ä½¿ç¨ç空é´å¤§å° </span><br><span class="line">â 卿¯ä¸ªDataNodeä¸é¢è®¾å®</span><br><span class="line">â é»è®¤å¼ï¼0</span><br><span class="line">â 建议为10737418240ï¼å³10Gãéè¦ç»åMapReduceåºæ¯è®¾ç½®ã </span><br><span class="line"></span><br><span class="line">â dfs.datanode.failed.volumes.tolerated</span><br><span class="line">â DataNodeå¯ä»¥å®¹å¿æåçç£çæ°éï¼è¶ è¿è¿ä¸ªæ°éDataNodeå°ä¼ç¦»çº¿ï¼ææå¨è¿ä¸ªèç¹ä¸é¢çblockå°ä¼è¢«éæ°å¤å¶ </span><br><span class="line">â é»è®¤æ¯0ï¼ä½æ¯å¨æå¤åç£ççæ¶åä¸è¬ä¼å¢å¤§è¿ä¸ªå¼</span><br><span class="line"></span><br><span class="line">â dfs.replication</span><br><span class="line">â å¨æä»¶è¢«åå ¥çæ¶åï¼æ¯ä¸åå°è¦è¢«å¤å¶å¤å°ä»½ </span><br><span class="line">â é»è®¤æ¯3份ã建议3份 </span><br><span class="line">â å¨å®¢æ·ç«¯ä¸è®¾å® </span><br><span class="line"></span><br><span class="line">é常ä¹éè¦å¨DataNodeä¸è®¾å®</span><br></pre></td></tr></table></figure> 1225<p>** å¯å¨é群 **</p> 1226<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line">æ ¼å¼åNameNodeï¼ç¬¬ä¸æ¬¡å¯å¨æ¶æ ¼å¼åï¼</span><br><span class="line">注æï¼æ ¼å¼åNameNodeï¼ä¼äº§çæ°çé群id,导è´NameNodeåDataNodeçé群idä¸ä¸è´ï¼é群æ¾ä¸å°å·²å¾æ°æ®ãæä»¥ï¼æ ¼å¼NameNodeæ¶ï¼ä¸å®è¦å å é¤dataæ°æ®ålogæ¥å¿ï¼ç¶ååæ ¼å¼åNameNodeã</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs namenode -format</span><br><span class="line"></span><br><span class="line">
1226å¯å¨NameNode</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/hadoop-daemon.sh start namenode</span><br><span class="line">WARNING: Use of this script to start HDFS daemons is deprecated.</span><br><span class="line">WARNING: Attempting to execute replacement "hdfs --daemon start" instead.</span><br><span class="line"></span><br><span class="line">å¯å¨DataNode</span><br><span class="line">[atguigu@hadoop101 hadoop-2.7.2]$ sbin/hadoop-daemon.sh start datanode</span><br><span class="line"></span><br><span class="line">æ¥çjavaè¿ç¨</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# jps</span><br><span class="line">10678 Jps</span><br><span class="line">10599 DataNode</span><br><span class="line">10044 NameNode</span><br><span class="line"></span><br><span class="line">æ°çæ¬å¯ä»¥ç¨ sbin/start-dfs.shå¯å¨ï¼ä½æ¯æ¥éï¼</span><br><span class="line"> Starting namenodes on [localhost]</span><br><span class="line"> ERROR: Attempting to operate on hdfs namenode as root</span><br><span class="line">è§£å³æ¹å¼ï¼</span><br><span class="line"> $ vim sbin/start-dfs.sh</span><br><span class="line"> $ vim sbin/stop-dfs.sh</span><br><span class="line"> æåé¢å¢å 以ä¸å 容</span><br><span class="line"> HDFS_DATANODE_USER=root</span><br><span class="line"> HADOOP_SECURE_DN_USER=hdfs</span><br><span class="line"> HDFS_NAMENODE_USER=root</span><br><span class="line"> HDFS_SECONDARYNAMENODE_USER=root</span><br><span class="line"></span><br><span class="line"> $ vim sbin/start-yarn.sh</span><br><span class="line"> $ vim sbin/stop-yarn.sh</span><br><span class="line"> æåé¢å¢å 以ä¸å 容</span><br><span class="line"> YARN_RESOURCEMANAGER_USER=root</span><br><span class="line"> HADOOP_SECURE_DN_USER=yarn</span><br><span class="line"> YARN_NODEMANAGER_USER=root</span><br></pre></td></tr></table></figure> 1227<p>web端æ¥çHDFSæä»¶ç³»ç»ï¼<a href="http://152.*****:9870/dfshealth.html#tab-overview" target="_blank" rel="noopener">http://152.*****:9870/dfshealth.html#tab-overview</a> èçæ¬ç«¯å£æ¯50070</p> 1228<p>æ¥çLogæ¥å¿ /usr/local/hadoop-3.1.2/logs</p> 1229<p>** æä½é群 **<br>å¨HDFSæä»¶ç³»ç»ä¸å建ä¸ä¸ªinputæä»¶å¤¹</p> 1230<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -mkdir -p /user/root/input</span><br><span class="line">2020-01-17 17:29:48,425 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br></pre></td></tr></table></figure> 1231<p>å°æµè¯æä»¶å 容ä¸ä¼ å°æä»¶ç³»ç»ä¸</p> 1232<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -put wcinput/wc.input /user/root/input/</span><br><span class="line">2020-01-17 17:31:20,430 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br></pre></td></tr></table></figure> 1233<p>æ¥çä¸ä¼ çæä»¶æ¯å¦æ£ç¡®</p> 1234<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -ls /user/root/input/</span><br><span class="line">2020-01-17 17:32:25,279 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br><span class="line">Found 1 items</span><br><span class="line">-rw-r--r-- 1 root supergroup 43 2020-01-17 17:31 /user/root/input/wc.input</span><br></pre></td></tr></table></figure> 1235<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -cat /user/root/ input/wc.input</span><br><span class="line">2020-01-17 17:32:37,910 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br><span class="line">cat: `/user/root': Is a directory</span><br><span class="line">hadoop yarn</span><br><span class="line">hadoop mapreduce</span><br><span class="line">
1235huyun</span><br><span class="line">huyun</span><br></pre></td></tr></table></figure> 1236<p>è¿è¡MapReduceç¨åº</p> 1237<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar wordcount /user/root/input/ /user/root/output</span><br></pre></td></tr></table></figure> 1238<p>æ¥çè¾åºç»æ</p> 1239<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -cat /user/root/output/*</span><br><span class="line">2020-01-17 17:34:03,420 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br><span class="line">hadoop 2</span><br><span class="line">huyun 2</span><br><span class="line">mapreduce 1</span><br><span class="line">yarn 1</span><br></pre></td></tr></table></figure> 1240<p>å°æµè¯æä»¶å 容ä¸è½½å°æ¬å°</p> 1241<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# hdfs dfs -get /user/root/output/* ./wcoutput/</span><br><span class="line">2020-01-17 17:36:40,621 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br><span class="line">get: `./wcoutput/_SUCCESS': File exists</span><br><span class="line">get: `./wcoutput/part-r-00000': File exists</span><br></pre></td></tr></table></figure> 1242<p>æ¬å°æä»¶åå¨ï¼å å é¤å¨ä¸è½½</p> 1243<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# rm -rf ./wcoutput/*</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# hdfs dfs -get /user/root/output/* ./wcoutput/</span><br><span class="line">2020-01-17 17:37:20,030 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable</span><br></pre></td></tr></table></figure> 1244<p>æ¥çæ¬å°ç»æ</p> 1245<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# cat ./wcoutput/*</span><br><span class="line">hadoop 2</span><br><span class="line">huyun 2</span><br><span class="line">mapreduce 1</span><br><span class="line">yarn 1</span><br></pre></td></tr></table></figure> 1246<p>å é¤è¾åºç»æ</p> 1247<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">hdfs dfs -rm -r /user/root/output</span><br></pre></td></tr></table></figure> 1248<h6 id="3-2ãå¯å¨YARNå¹¶è¿è¡MapReduceç¨åº"><a href="#3-2ãå¯å¨YARNå¹¶è¿è¡MapReduceç¨åº" class="headerlink" title="3.2ãå¯å¨YARNå¹¶è¿è¡MapReduceç¨åº"></a>3.2ãå¯å¨YARNå¹¶è¿è¡MapReduceç¨åº</h6><p><strong>é ç½®é群</strong><br>é ç½®ç¯å¢</p> 1249<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# vim etc/hadoop/yarn-env.sh </span><br><span class="line">[root@VM_0_3_centos hadoop]# vim mapred-env.sh </span><br><span class="line"></span><br><span class="line">export JAVA_HOME=/usr/local/java8/jdk1.8.0_144</span><br></pre></td></tr></table></figure> 1250 1251<p>é ç½®yarn-site.xml</p> 1252<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><!-- Reducerè·åæ°æ®çæ¹å¼ --></span><br><span class="line"><property></span><br><span class="line"> <name>yarn.nodemanager.aux-services</name></span><br><span class="line"> <value>mapreduce_shuffle</value></span><br><span class="line"></property></span><br><span class="line"></span><br><span class="line"><!-- æå®YARNçResourceManagerçå°å --></span><br><span class="line"><property></span><br><span class="line"> <name>yarn.resourcemanager.hostname</name></span><br><span class="line"> <value>VM_0_3_centos</value></span><br><span class="line"></property></span><br></pre></td></tr></table></figure> 1253<p>é ç½®ï¼mapred-site.xml</p> 1254<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop]# vim mapred-site.xml </span><br><span class="line"></span><br><span class="line"><!-- æå®MRè¿è¡å¨YARNä¸ --></span><br><span class="line"><property></span><br><span class="line"> <name>mapreduce.framework.name</name></span><br><span class="line"> <value>yarn</value></span><br><span class="line"></property></span><br><span class="line"><property></span><br><span class="line"><name>yarn.app.mapreduce.am.env</name></span><br><span class="line"><value>HADOOP_MAPRED_HOME=/usr/local/hadoop-3.1.2</value></span><br><span class="line"></property></span><br><span class="line"><property></span><br><span class="line"><name>mapreduce.map.env</name></span><br><span class="line"><value>HADOOP_MAPRED_HOME=/usr/local/hadoop-3.1.2</value></span><br><span class="line"></property></span><br><span class="line"><property></span><br><span class="line"><name>mapreduce.reduce.env</name></span><br><span class="line"><value>HADOOP_MAPRED_HOME=/usr/local/hadoop-3.1.2</value></span><br><span class="line"></property></span><br><span class="line"></span><br><span class="line"><property> </span><br><span class="line"> <name>mapreduce.application.classpath</name></span><br><span class="line"> <value>/usr/local/hadoop-3.1.2/share/hadoop/mapreduce/*,/usr/local/hadoop-3.1.2/share/hadoop/mapreduce/lib/*</value></span><br><span class="line"></property></span><br></pre></td></tr></table></figure> 1255 1256<p><strong>å¯å¨é群</strong><br>å¯å¨åå¿ é¡»ä¿è¯NameNodeåDataNodeå·²ç»å¯å¨</p> 1257<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh start resourcemanager</span><br><span class="line">WARNING: Use of this script to start YARN daemons is deprecated.</span><br><span class="line">WARNING: Attempting to execute replacement "yarn --daemon start" instead.</span><br><span class="line"></span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh start nodemanager</span><br><span class="line">WARNING: Use of this script to start YARN daemons is deprecated.</span><br><span class="line">WARNING: Attempting to execute replacement "yarn --daemon start" instead.</span><br><span class="line"></span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# jps</span><br><span class="line">21680 DataNode</span><br><span class="line">13315 ResourceManager</span><br><span class="line">13831 Jps</span><br><span class="line">13706 NodeManager</span><br><span class="line">
125721482 NameNode</span><br></pre></td></tr></table></figure> 1258<p><strong>é群æä½</strong><br>YARNçæµè§å¨æ¥çï¼<a href="http://152.....56:8088/cluster" target="_blank" rel="noopener">http://152.....56:8088/cluster</a></p> 1259<p><img src="https://img.huyunshun.com/img/20200423162313.png" alt="20200423162313"></p> 1260<p>å é¤æä»¶ç³»ç»ä¸çoutputæä»¶</p> 1261<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -rm -R /user/root/output</span><br></pre></td></tr></table></figure> 1262<p>æ§è¡MapReduceç¨åº</p> 1263<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar wordcount /user/root/input/ /user/root/output</span><br></pre></td></tr></table></figure> 1264<p>æ¥çè¿è¡ç»æå¯ä»¥éè¿æµè§å¨æ¥çã</p> 1265<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure> 1266<h6 id="3-3ãé ç½®å岿å¡å¨"><a href="#3-3ãé ç½®å岿å¡å¨" class="headerlink" title="3.3ãé ç½®å岿å¡å¨"></a>3.3ãé ç½®å岿å¡å¨</h6><p>ä¸ºäºæ¥çç¨åºçåå²è¿è¡æ åµï¼éè¦é ç½®ä¸ä¸å岿å¡å¨ã</p> 1267<p><strong>é ç½®mapred-site.xml</strong></p> 1268<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">vim mapred-site.xml</span><br><span class="line"></span><br><span class="line"><!-- å岿å¡å¨ç«¯å°å --></span><br><span class="line"><property></span><br><span class="line"><name>mapreduce.jobhistory.address</name></span><br><span class="line"><value>VM_0_3_centos:10020</value></span><br><span class="line"></property></span><br><span class="line"><!-- å岿å¡å¨web端å°å --></span><br><span class="line"><property></span><br><span class="line"> <name>mapreduce.jobhistory.webapp.address</name></span><br><span class="line"> <value>VM_0_3_centos:19888</value></span><br><span class="line"></property></span><br></pre></td></tr></table></figure> 1269<p><strong>å¯å¨å岿å¡å¨</strong></p> 1270<p>sbin/mr-jobhistory-daemon.sh start historyserver</p> 1271<p><strong>æ¥çJobHistory</strong></p> 1272<p><a href="http://IP:19888/jobhistory" target="_blank" rel="noopener">http://IP:19888/jobhistory</a></p> 1273<h6 id="3-4ãé ç½®æ¥å¿çèé"><a href="#3-4ãé ç½®æ¥å¿çèé" class="headerlink" title="3.4ãé ç½®æ¥å¿çèé"></a>3.4ãé ç½®æ¥å¿çèé</h6><p>åºç¨è¿è¡å®æä»¥åï¼å°ç¨åºè¿è¡æ¥å¿ä¿¡æ¯ä¸ä¼ å°HDFSç³»ç»ä¸ãæ¹ä¾¿çæ¥çå°ç¨åºè¿è¡è¯¦æ ï¼æ¹ä¾¿å¼åè°è¯ã</p> 1274<p>注æï¼å¼å¯æ¥å¿èéåè½ï¼éè¦éæ°å¯å¨NodeManager ãResourceManageråHistoryManagerã</p> 1275<p><strong>é ç½®yarn-site.xml</strong></p> 1276<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">[atguigu@hadoop101 hadoop]$ vi yarn-site.xml</span><br><span class="line"></span><br><span class="line"><!-- æ¥å¿èéåè½ä½¿è½ --></span><br><span class="line"><property></span><br><span class="line"><name>yarn.log-aggregation-enable</name></span><br><span class="line"><value>true</value></span><br><span class="line"></property></span><br><span class="line"></span><br><span class="line"><!-- æ¥å¿ä¿çæ¶é´è®¾ç½®7天 --></span><br><span class="line"><property></span><br><span class="line"><name>yarn.log-aggregation.retain-seconds</name></span><br><span class="line"><value>604800</value></span><br><span class="line"></property></span><br></pre></td></tr></table></figure> 1277<p><strong>éå¯NodeManager ãResourceManageråHistoryManager</strong></p> 1278<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh stop resourcemanager</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh stop nodemanager</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/mr-jobhistory-daemon.sh stop historyserver</span><br><span class="line"></span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh start resourcemanager</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/yarn-daemon.sh start nodemanager</span><br><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# sbin/mr-jobhistory-daemon.sh start historyserver</span><br></pre></td></tr></table></figure> 1279<p><strong>å é¤HDFSä¸å·²ç»åå¨çè¾åºæä»¶</strong></p> 1280<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# bin/hdfs dfs -rm -R /user/root/output</span><br></pre></td></tr></table></figure> 1281<p><strong>æ§è¡WordCountç¨åº</strong></p> 1282<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[root@VM_0_3_centos hadoop-3.1.2]# hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar wordcount /user/root/input /user/root/output</span><br></pre></td></tr></table></figure> 1283<p><strong>æ¥çæ¥å¿</strong></p> 1284<p><a href="http://IP:19888/jobhistory" target="_blank" rel="noopener">http://IP:19888/jobhistory</a></p> 1285<h6 id="3-5ãé ç½®æä»¶è¯´æ"><a href="#3-5ãé ç½®æä»¶è¯´æ" class="headerlink" title="3.5ãé ç½®æä»¶è¯´æ"></a>3.5ãé ç½®æä»¶è¯´æ</h6><p>Hadoopé ç½®æä»¶å两类ï¼é»è®¤é ç½®æä»¶åèªå®ä¹é ç½®æä»¶ï¼åªæç¨æ·æ³ä¿®æ¹æä¸é»è®¤é ç½®å¼æ¶ï¼æéè¦ä¿®æ¹èªå®ä¹é ç½®æä»¶ï¼æ´æ¹ç¸åºå±æ§å¼ã</p> 1286<p>é»è®¤é ç½®æä»¶ï¼</p> 1287<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">é»è®¤æä»¶ å¨Hadoopçjarå ä¸çä½ç½®</span><br><span class="line">[core-default.xml] hadoop-common-2.7.2.jar/ core-default.xml</span><br><span class="line">[hdfs-default.xml] hadoop-hdfs-2.7.2.jar/ hdfs-default.xml</span><br><span class="line">[yarn-default.xml] hadoop-yarn-common-2.7.2.jar/ yarn-default.xml</span><br><span class="line">[mapred-default.xml] hadoop-mapreduce-client-core-2.7.2.jar/ mapred-default.xml</span><br></pre></td></tr></table></figure> 1288<p>èªå®ä¹é ç½®æä»¶ï¼core-site.xmlãhdfs-site.xmlãyarn-site.xmlãmapred-site.xml</p> 1289<h4 id="4ãå®å ¨åå¸å¼è¿è¡æ¨¡å¼"><a href="#4ãå®å ¨åå¸å¼è¿è¡æ¨¡å¼" class="headerlink" title="4ãå®å ¨åå¸å¼è¿è¡æ¨¡å¼"></a>4ãå®å ¨åå¸å¼è¿è¡æ¨¡å¼</h4> 1290 1291 1292 1293 </div> 1294 <!-- ç¸å ³æç« æ¨è --> 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 <footer class="post-footer"> 1307 1308 1309 1310 1311 1312 1313 1314 1315 <div class="post-eof"></div> 1316 1317 </footer> 1318 </div> 1319 1320 1321 1322 </article> 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 1335 1336 1337 1338 <div class="post-block"> 1339 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2019/12/23/centos%20%E8%AE%BE%E7%BD%AEsystemctl%E8%87%AA%E5%90%AF%E6%9C%8D%E5%8A%A1%E6%96%87%E4%BB%B6/"> 1340 1341 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 1342 <meta itemprop="name" content="忍"> 1343 <meta itemprop="description" content=""> 1344 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 1345 </span> 1346 1347 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 1348 <meta itemprop="name" content="ç®"> 1349 </span> 1350 1351 1352 <header class="post-header"> 1353 1354 1355 1356 <h1 class="post-title" itemprop="name headline"> 1357 1358 <a class="post-title-link" href="/2019/12/23/centos%20%E8%AE%BE%E7%BD%AEsystemctl%E8%87%AA%E5%90%AF%E6%9C%8D%E5%8A%A1%E6%96%87%E4%BB%B6/" itemprop="url">centos 设置systemctlèªå¯æå¡æä»¶</a></h1> 1359 1360 1361 <div class="post-meta">
1362 <span class="post-time"> 1363 1364 <span class="post-meta-item-icon"> 1365 <i class="fa fa-calendar-o"></i> 1366 </span> 1367 1368 <span class="post-meta-item-text">å表äº</span> 1369 1370 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2019-12-23T16:14:52+08:00"> 1371 2019-12-23 1372 </time> 1373 1374 1375 1376 1377 1378 </span> 1379 1380 1381 <span class="post-category" > 1382 1383 <span class="post-meta-divider">|</span> 1384 1385 <span class="post-meta-item-icon"> 1386 <i class="fa fa-folder-o"></i> 1387 </span> 1388 1389 <span class="post-meta-item-text">åç±»äº</span> 1390 1391 1392 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 1393 <a href="/categories/linux/" itemprop="url" rel="index"> 1394 <span itemprop="name">linux</span> 1395 </a> 1396 </span> 1397 1398 1399 1400 1401 </span> 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 </div> 1418 </header> 1419 1420 1421 1422 1423 1424 <div class="post-body" itemprop="articleBody"> 1425 1426 1427 1428 1429 1430 1431 1432 <h1 id="æ¹å¼ä¸"><a href="#æ¹å¼ä¸" class="headerlink" title="æ¹å¼ä¸"></a>æ¹å¼ä¸</h1><h2 id="å»ºç«æå¡æä»¶"><a href="#å»ºç«æå¡æä»¶" class="headerlink" title="å»ºç«æå¡æä»¶"></a>å»ºç«æå¡æä»¶</h2><p>vim /usr/lib/systemd/system/mongodb.service</p> 1433<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">[Unit] </span><br><span class="line"> </span><br><span class="line">Description=mongodb </span><br><span class="line">After=network.target remote-fs.target nss-lookup.target </span><br><span class="line"> </span><br><span class="line">[Service] </span><br><span class="line">Type=forking </span><br><span class="line">ExecStart=/usr/local/mongodb/bin/mongod -config /usr/local/mongodb/bin/mongodb.conf</span><br><span class="line">ExecReload=/bin/kill -s HUP $MAINPID </span><br><span class="line">ExecStop=/usr/local/mongodb/bin/mongod --shutdown -config /usr/local/mongodb/bin/mongodb.conf </span><br><span class="line">PrivateTmp=true </span><br><span class="line"> </span><br><span class="line">[Install] </span><br><span class="line">WantedBy=multi-user.target</span><br></pre></td></tr></table></figure> 1434 1435<p>æä»¶å 容解é</p> 1436<p>Description:æè¿°æå¡</p> 1437<p>After:æè¿°æå¡ç±»å«</p> 1438<p>[Service]æå¡è¿è¡åæ°ç设置</p> 1439<p>Type=forkingæ¯åå°è¿è¡çå½¢å¼</p> 1440<p>ExecStart为æå¡çå ·ä½è¿è¡å½ä»¤</p> 1441<p>ExecReload为éå¯å½ä»¤</p> 1442<p>ExecStopä¸ºåæ¢å½ä»¤</p> 1443<p>PrivateTmp=Trueè¡¨ç¤ºç»æå¡åé ç¬ç«ç临æ¶ç©ºé´</p> 1444<p>注æï¼å¯å¨ãéå¯ã忢å½ä»¤å ¨é¨è¦æ±ä½¿ç¨ç»å¯¹è·¯å¾</p> 1445<p>[Install]æå¡å®è£ çç¸å ³è®¾ç½®ï¼å¯è®¾ç½®ä¸ºå¤ç¨æ·</p> 1446<h2 id="è®¾ç½®å¼æºèªå¯å¨"><a href="#è®¾ç½®å¼æºèªå¯å¨" class="headerlink" title="è®¾ç½®å¼æºèªå¯å¨"></a>è®¾ç½®å¼æºèªå¯å¨</h2><p>ä»»æç®å½ä¸æ§è¡</p> 1447<p>systemctl enable xxx.service </p> 1448<h2 id="å ¶ä»å½ä»¤"><a href="#å ¶ä»å½ä»¤" class="headerlink" title="å ¶ä»å½ä»¤"></a>å ¶ä»å½ä»¤</h2><p>å¯å¨æå¡</p> 1449<p>systemctl start xxxx.service</p> 1450<p>è®¾ç½®å¼æºèªå¯å¨</p> 1451<p>systemctl enable xxxx.service</p> 1452<p>忢弿ºèªå¯å¨</p> 1453<p>systemctl disable xxxx.service</p> 1454<p>æ¥çæå¡å½åç¶æ</p> 1455<p>systemctl status xxx.service</p> 1456<p>éæ°å¯å¨æå¡</p> 1457<p>systemctl restart xxx.service</p> 1458<p>æ¥çææå·²å¯å¨çæå¡</p> 1459<p>systemctl list-units âtype=service</p> 1460<h2 id="CentOS7-0ä¸systemctlå¯å¨å ³éæå¡çç¨æ³"><a href="#CentOS7-0ä¸systemctlå¯å¨å ³éæå¡çç¨æ³" class="headerlink" title="CentOS7.0ä¸systemctlå¯å¨å ³éæå¡çç¨æ³"></a>CentOS7.0ä¸systemctlå¯å¨å ³éæå¡çç¨æ³</h2><p>systemctlæ¯ä¸»è¦çå·¥å ·ï¼å®èåä¹åserviceåchkconfigçåè½äºä¸ä½ãå¯ä»¥ä½¿ç¨å®æ°¸ä¹ æ§æåªå¨å½åä¼è¯ä¸å¯ç¨/ç¦ç¨æå¡ã<br>systemctlå¯ä»¥ååºæ£å¨è¿è¡çæå¡ç¶æ<br>systemd-cgls以æ å½¢ååºæ£å¨è¿è¡çè¿ç¨ï¼å®å¯ä»¥é彿¾ç¤ºæ§å¶ç»å 容ã </p> 1461<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">å¯å¨/å ³éãå¯ç¨/ç¦ç¨æå¡ï¼</span><br><span class="line">å¯å¨ä¸ä¸ªæå¡ï¼systemctl start postfix.service</span><br><span class="line">å ³éä¸ä¸ªæå¡ï¼systemctl stop postfix.service</span><br><span class="line">éå¯ä¸ä¸ªæå¡ï¼systemctl restart postfix.service</span><br><span class="line">æ¾ç¤ºä¸ä¸ªæå¡çç¶æï¼systemctl status postfix.service</span><br><span class="line"></span><br><span class="line">å¨å¼æºæ¶å¯ç¨ä¸ä¸ªæå¡ï¼systemctl enable postfix.service</span><br><span class="line">å¨å¼æºæ¶ç¦ç¨ä¸ä¸ªæå¡ï¼systemctl disable postfix.service</span><br><span class="line">æ¥çæå¡æ¯å¦å¼æºå¯å¨ï¼systemctl is-enabled postfix.service;echo $?</span><br><span class="line"></span><br><span class="line">æ¥çå·²å¯å¨çæå¡å表ï¼systemctl list-unit-files|grep enabled</span><br></pre></td></tr></table></figure> 1462<p>说æï¼å¯ç¨æå¡å°±æ¯å¨å½åârunlevelâçé ç½®æä»¶ç®å½/etc/systemd/system/multi-user.target.wants/éï¼å»ºç«/usr/lib/systemd/systeméé¢å¯¹åºæå¡é ç½®æä»¶çè½¯é¾æ¥ï¼ç¦ç¨æå¡å°±æ¯å 餿¤è½¯é¾æ¥</p> 1463<h1 id="æ¹å¼äº"><a href="#æ¹å¼äº" class="headerlink" title="æ¹å¼äº"></a>æ¹å¼äº</h1><p>å å¨/etc/rc.d/init.d䏿°å»ºæä»¶ mongod</p> 1464<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line">#!/bin/sh</span><br><span class="line">#</span><br><span class="line">#chkconfig: 2345 80 90</span><br><span class="line">#description: mongodb</span><br><span class="line"></span><br><span class="line">if test -f /sys/kernel/mm/transparent_hugepage/enabled; then</span><br><span class="line"> echo never > /sys/kernel/mm/transparent_hugepage/enabled</span><br><span class="line">fi</span><br><span class="line">if test -f /sys/kernel/mm/transparent_hugepage/defrag; then</span><br><span class="line"> echo never > /sys/kernel/mm/transparent_hugepage/defrag</span><br><span class="line">fi</span><br><span class="line"></span><br><span class="line">start() {</span><br><span class="line">/usr/local/mongodb/bin/mongod -config /usr/local/mongodb/bin/mongodb.conf</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">stop() {</span><br><span class="line">/usr/local/mongodb/bin/mongod -config /usr/local/mongodb/bin/mongodb.conf --shutdown</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">case "$1" in</span><br><span class="line"> start)</span><br><span class="line"> start</span><br><span class="line"> ;;</span><br><span class="line"> stop)</span><br><span class="line"> stop</span><br><span class="line"> ;;</span><br><span class="line"> restart)</span><br><span class="line"> stop</span><br><span class="line"> start</span><br><span class="line"> ;;</span><br><span class="line"> *)</span><br><span class="line"> echo $"Usage: $0 {start|stop|restart}"</span><br><span class="line"> exit 1</span><br><span class="line">esac</span><br></pre></td></tr></table></figure> 1465<p>ææ çæä½ï¼</p> 1466<p>chmod +x /etc/rc.d/init.d/mongod</p> 1467<p>chkconfig âadd mongod</p> 1468<p>chkconfig âlevel 345 mongod on</p> 1469<p>chkconfig âlist mongod</p> 1470<p>service mongod start</p> 1471<p>ä¹åå°±å¯ä»¥å¼å§ä½¿ç¨service mongod start|stop|restart 管çmongodbæå¡äºã</p> 1472 1473 1474 1475 1476 </div> 1477 <!-- ç¸å ³æç« æ¨è --> 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 <footer class="post-footer"> 1490 1491 1492 1493 1494 1495 1496 1497 1498 <div class="post-eof"></div> 1499 1500 </footer> 1501 </div> 1502 1503 1504 1505 </article> 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 1518 1519 1520 1521 <div class="post-block"> 1522 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2019/12/23/Hexo%E6%90%AD%E5%BB%BA/"> 1523 1524 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 1525 <meta itemprop="name" content="忍"> 1526 <meta itemprop="description" content=""> 1527 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 1528 </span> 1529 1530 <span hidden itemprop="publisher" itemscope 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1545 <span class="post-time"> 1546 1547 <span class="post-meta-item-icon"> 1548 <i class="fa fa-calendar-o"></i> 1549 </span> 1550 1551 <span class="post-meta-item-text">å表äº</span> 1552 1553 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2019-12-23T14:42:54+08:00"> 1554 2019-12-23 1555 </time> 1556 1557 1558 1559 1560 1561 </span> 1562 1563 1564 <span class="post-category" > 1565 1566 <span class="post-meta-divider">|</span> 1567 1568 <span class="post-meta-item-icon"> 1569 <i class="fa fa-folder-o"></i> 1570 </span> 1571 1572 <span class="post-meta-item-text">åç±»äº</span> 1573 1574 1575 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 1576 <a href="/categories/hexo/" itemprop="url" rel="index"> 1577 <span itemprop="name">hexo</span> 1578 </a> 1579 </span> 1580 1581 1582 1583 1584 </span> 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 </div> 1601 </header> 1602 1603 1604 1605 1606 1607 <div class="post-body" itemprop="articleBody"> 1608 1609 1610 1611 1612 1613 1614 1615 <p>Hexoæå»º</p> 1616<p>è§£å³éå®åé®é¢ï¼<br>npm i hexo-generator-cname âsave</p> 1617<p>NodeJSå åä¸è¶³ node âmax-old-space-size=8192 âoptimize-for-size âmax-executable-size=8192 âmax_old_space_size=8192 âoptimize_for_size âmax_executable_size=8192 node_modules/karma/bin/karma start âsingle-run âmax_new_space_size=8192 âprod âaot</p> 1618 1619 1620 1621 1622 </div> 1623 <!-- ç¸å ³æç« æ¨è --> 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 <footer class="post-footer"> 1636 1637 1638 1639 1640 1641 1642 1643 1644 <div class="post-eof"></div> 1645 1646 </footer> 1647 </div> 1648 1649 1650 1651 </article> 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 1664 1665 1666 1667 <div class="post-block"> 1668 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2019/09/02/Redis%20%E7%AE%A1%E9%81%93%E6%8A%80%E6%9C%AF/"> 1669 1670 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 1671 <meta itemprop="name" content="忍"> 1672 <meta itemprop="description" content=""> 1673 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 1674 </span> 1675 1676 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 1677 <meta itemprop="name" content="ç®"> 1678 </span> 1679 1680 1681 <header class="post-header"> 1682 1683 1684 1685 <h1 class="post-title" itemprop="name headline"> 1686 1687 <a class="post-title-link" href="/2019/09/02/Redis%20%E7%AE%A1%E9%81%93%E6%8A%80%E6%9C%AF/" itemprop="url">Redis ç®¡éææ¯</a></h1> 1688 1689 1690 <div class="post-meta"> 1691 <span class="post-time"> 1692 1693 <span class="post-meta-item-icon"> 1694 <i class="fa fa-calendar-o"></i> 1695 </span> 1696 1697 <span class="post-meta-item-text">å表äº</span> 1698 1699 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2019-09-02T16:11:59+08:00"> 1700 2019-09-02 1701 </time> 1702 1703 1704 1705 1706 1707 </span> 1708 1709 1710 <span class="post-category" > 1711 1712 <span class="post-meta-divider">|</span> 1713 1714 <span class="post-meta-item-icon"> 1715 <i class="fa fa-folder-o"></i> 1716 </span> 1717 1718 <span class="post-meta-item-text">åç±»äº</span> 1719 1720 1721 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 1722 <a href="/categories/redis/" itemprop="url" rel="index">
1723 <span itemprop="name">redis</span> 1724 </a> 1725 </span> 1726 1727 1728 1729 1730 </span> 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 </div> 1747 </header> 1748 1749 1750 1751 1752 1753 <div class="post-body" itemprop="articleBody"> 1754 1755 1756 1757 1758 1759 1760 1761 <h5 id="管é"><a href="#管é" class="headerlink" title="管é"></a>管é</h5><p>Redisæ¯ä¸ç§åºäºå®¢æ·ç«¯-æå¡ç«¯æ¨¡å以å请æ±/ååºåè®®çTCPæå¡ãè¿æå³çé常æ åµä¸ä¸ä¸ªè¯·æ±ä¼éµå¾ªä»¥ä¸æ¥éª¤ï¼</p> 1762<ul> 1763<li>客æ·ç«¯åæå¡ç«¯åéä¸ä¸ªæ¥è¯¢è¯·æ±ï¼å¹¶çå¬Socketè¿åï¼é常æ¯ä»¥é»å¡æ¨¡å¼ï¼çå¾ æå¡ç«¯ååºã</li> 1764<li>æå¡ç«¯å¤çå½ä»¤ï¼å¹¶å°ç»æè¿åç»å®¢æ·ç«¯ã</li> 1765</ul> 1766<p>Redis ç®¡éææ¯å¯ä»¥å¨æå¡ç«¯æªååºæ¶ï¼å®¢æ·ç«¯å¯ä»¥ç»§ç»åæå¡ç«¯åé请æ±ï¼å¹¶æç»ä¸æ¬¡æ§è¯»åæææå¡ç«¯çååºã</p> 1767<p>ç®¡éææ¯ææ¾èçä¼å¿æ¯æé«äº redis æå¡çæ§è½ã</p> 1768<p>pipelineçææ³</p> 1769<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">妿clientæ§è¡ä¸äºç¸äºä¹é´æ å ³çå½ä»¤æè ä¸éè¦è·åå½ä»¤çè¿åå¼ï¼é£ä¹rediså è®¸ä½ è¿ç»åé夿¡å½ä»¤ï¼èä¸éè¦çå¾ åé¢å½ä»¤æ§è¡å®æ¯ã</span><br><span class="line">æ¯å¦æä»¬æ§è¡3æ¡INCRå½ä»¤ï¼å¦æä½¿ç¨ç®¡éï¼ç论ä¸åªéè¦ä¸ä¸ªRTT+3æ¡å½ä»¤çæ§è¡æ¶é´å³å¯ï¼å¦æä¸éç¨ç®¡éï¼é£ä¹å¯è½éè¦é¢å¤ç两个RTTæ¶é´ã</span><br><span class="line">管éç¸å½äºæ¹å¤çèæ¬ï¼ç¸å½äºæ¯å½ä»¤éã</span><br></pre></td></tr></table></figure> 1770 1771 1772<p>Redisç管éå¯ä»¥å¨å¤§éæ°æ®éè¦ä¸æ¬¡æ§æä½å®æçæ¶åï¼ä½¿ç¨Pipelineè¿è¡æ¹å¤çï¼å°ä¸å¤§éçæä½åå¹¶æä¸æ¬¡æä½ï¼å¯ä»¥åå°é¾è·¯å±çæ¶é´æ¶èã</p> 1773<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">Pipeline pipe = jedis.pipelined(); <span class="comment">// å å建ä¸ä¸ªpipelineç龿¥å¯¹è±¡</span></span><br><span class="line"><span class="keyword">long</span> start_pipe = System.currentTimeMillis();</span><br><span class="line"><span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i < <span class="number">10000</span>; i++) {</span><br><span class="line"> pipe.set(String.valueOf(i), String.valueOf(i));</span><br><span class="line">}</span><br><span class="line">pipe.sync(); <span class="comment">// è·åææçresponse</span></span><br><span class="line"><span class="keyword">long</span> end_pipe = System.currentTimeMillis();</span><br><span class="line">logger.info(<span class="string">"the pipe total time is:"</span> + (end_pipe - start_pipe));</span><br></pre></td></tr></table></figure> 1774 1775<h5 id="SCANãSSCANãHSCANãZSCAN"><a href="#SCANãSSCANãHSCANãZSCAN" class="headerlink" title="SCANãSSCANãHSCANãZSCAN"></a>SCANãSSCANãHSCANãZSCAN</h5><p>SCANãSSCANãHSCANãZSCAN 4 个å½ä»¤ï¼åå«ç¨äºéåãåå¸é®åæåºéçã</p> 1776<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">SCANï¼å½ä»¤ç¨äºè¿ä»£å½åæ°æ®åºä¸çæ°æ®åºé®ã</span><br><span class="line">SSCANï¼å½ä»¤ç¨äºè¿ä»£éåé®ä¸çå ç´ ã</span><br><span class="line">HSCANï¼å½ä»¤ç¨äºè¿ä»£åå¸é®ä¸çé®å¼å¯¹ã</span><br><span class="line">
1776ZSCANï¼å½ä»¤ç¨äºè¿ä»£æåºéåä¸çå ç´ ï¼å æ¬å ç´ æååå ç´ åå¼ï¼ã</span><br></pre></td></tr></table></figure> 1777<p>SCAN cursor [MATCH pattern] [COUNT count]</p> 1778<p>å½éè¦æ¨¡ç³æ¥è¯¢æè 大æ¹éæ¶åï¼keys * è¿è¡æ¥è¯¢ key çæ¶åä¼è¿è¡å µå¡ï¼å¯¼è´ redis æ´ä½ä¸å¯ç¨ï¼å 为redisæ¯å线ç¨ï¼èä½¿ç¨ scan å½ä»¤åä¸ä¼ã</p> 1779<p>scan 游æ MATCH <è¿ååç»å®æ¨¡å¼ç¸å¹é çå ç´ > count æ¯æ¬¡è¿ä»£æè¿åçå ç´ æ°é SCAN å½ä»¤æ¯å¢éç循ç¯ï¼æ¯æ¬¡è°ç¨åªä¼è¿åä¸å°é¨åçå ç´ ã</p> 1780<p>å¨ Redis ä¸çå ·ä½ç¨æ³å¦ä¸ï¼</p> 1781<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">scan 0 match xttblog.com* count 5</span><br><span class="line">sscan myset 0 match è¡*</span><br></pre></td></tr></table></figure> 1782<p>SCAN å½ä»¤å¯¹åºç Jedis </p> 1783<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line">Jedis jedis = pool.getResource();</span><br><span class="line">ScanParams scanParams = <span class="keyword">new</span> ScanParams();</span><br><span class="line">List<String> list = <span class="keyword">new</span> ArrayList<>();</span><br><span class="line">scanParams.match(key);</span><br><span class="line">scanParams.count(<span class="number">100</span>);</span><br><span class="line"><span class="comment">//å½ SCAN å½ä»¤ç游æ åæ°è¢«è®¾ç½®ä¸º 0 æ¶ï¼ æå¡å¨å°å¼å§ä¸æ¬¡æ°çè¿ä»£ï¼ è彿å¡å¨åç¨æ·è¿åå¼ä¸º 0 çæ¸¸æ æ¶ï¼ 表示è¿ä»£å·²ç»æã</span></span><br><span class="line">String cursor = ScanParams.SCAN_POINTER_START;</span><br><span class="line"><span class="keyword">while</span> (<span class="keyword">true</span>) {</span><br><span class="line"> ScanResult<String> scan = jedis.scan(cursor, scanParams);</span><br><span class="line"> List<String> elements = scan.getResult();</span><br><span class="line"> <span class="keyword">if</span> (CollectionUtils.isNotEmpty(elements)) {</span><br><span class="line"> list.addAll(elements);</span><br><span class="line"> }</span><br><span class="line"> String cursor = scan.getStringCursor();
1783</span><br><span class="line"> log.info(<span class="string">"scanï¼è¿åç¨äºä¸æ¬¡éåçæ¸¸æ "</span> + cursor);</span><br><span class="line"> log.info(<span class="string">"scanï¼è¿åç»æ "</span> + elements);</span><br><span class="line"> <span class="keyword">if</span> (ScanParams.SCAN_POINTER_START.equals(cursor)) {</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line">jedis.close();</span><br></pre></td></tr></table></figure> 1784<p>å ¶ä»æä½ç±»ä¼¼ã<a href="https://www.xttblog.com/?p=3635" target="_blank" rel="noopener">https://www.xttblog.com/?p=3635</a></p> 1785<p>注æï¼SCAN å½ä»¤ä¸è½ä¿è¯æ¯æ¬¡è¿åçå¼é½æ¯æåºçï¼åä¸ä¸ª key æå¯è½è¿å夿¬¡ï¼ä¸ååºåï¼éè¦åºç¨ç¨åºå»å¤çã</p> 1786<p>ä¸ä¸ªæ¹éå é¤çä¾åã</p> 1787<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">
178753</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//keyææ¨¡ç³å¹é
*ï¼æ¥æ¾å°å¯¹åºçå»å é¤ï¼å¯å¨ä¸ä¸ªçº¿ç¨å»æ¥æ¾ãéè¿æ¸¸æ çæ¹å¼ï¼ç¨ç®¡éææ¯æä½ã</span></span><br><span class="line"><span class="function"><span class="keyword">private</span> Long <span class="title">executeDel</span><span class="params">(Jedis jedis, String key)</span> <span class="keyword">throws</span> Exception </span>{</span><br><span class="line"> Long count = <span class="number">0L</span>;</span><br><span class="line"> CountDownLatch countDownLatch = <span class="keyword">new</span> CountDownLatch(<span class="number">0</span>);</span><br><span class="line"> Future[] futureArray = <span class="keyword">new</span> Future[<span class="number">1</span>];</span><br><span class="line"> ScanParams scanParams = <span class="keyword">new</span> ScanParams().count(<span class="number">1</span>);</span><br><span class="line"> scanParams.match(key);</span><br><span class="line"> ExecutorService executor = Executors.newSingleThreadExecutor();</span><br><span class="line"> futureArray[<span class="number">0</span>] = executor.submit(<span class="keyword">new</span> JedisDeleteThread(jedis, scanParams, countDownLatch));</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="comment">//çå¾
çº¿ç¨æ±æ»</span></span><br><span class="line"> countDownLatch.await();</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> != futureArray && futureArray.length > <span class="number">0</span>) {</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i < futureArray.length; i++) {</span><br><span class="line"> count += (<span class="keyword">long</span>) futureArray[i].get();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (InterruptedException e) {</span><br><span class="line"> log.error(e.getMessage());</span><br><span class="line"> } <span class="keyword">catch</span> (ExecutionException e) {</span><br><span class="line"> log.error(e.getMessage());</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (InterruptedException e) {</span><br><span class="line"> log.error(e.getMessage());</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> count;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">//çº¿ç¨ æ§è¡æ¥æ¾åå é¤å¤ç</span></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">JedisDeleteThread</span> <span class="keyword">implements</span> <span class="title">Callable</span><<span class="title">Long</span>> </span>{</span><br><span class="line"> <span class="keyword">private</span> Jedis jedis;</span><br><span class="line"> ScanParams params;
1787</span><br><span class="line"> CountDownLatch countDownLatch;</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="title">JedisDeleteThread</span><span class="params">(Jedis jedis, ScanParams params, CountDownLatch downLatch)</span> </span>{</span><br><span class="line"> <span class="keyword">this</span>.jedis = jedis;</span><br><span class="line"> <span class="keyword">this</span>.params = params;</span><br><span class="line"> <span class="keyword">this</span>.countDownLatch = downLatch;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> Long <span class="title">call</span><span class="params">()</span> <span class="keyword">throws</span> Exception </span>{</span><br><span class="line"> <span class="keyword">long</span> sum = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> String cursor = ScanParams.SCAN_POINTER_START;</span><br><span class="line"> ScanResult<String> scanResult = <span class="keyword">null</span>;</span><br><span class="line"> List<String> result = <span class="keyword">null</span>;</span><br><span class="line"> Pipeline pipeline = jedis.pipelined();</span><br><span class="line"> <span class="keyword">do</span> {</span><br><span class="line"> scanResult = jedis.scan(cursor, params);</span><br><span class="line"> result = scanResult.getResult();</span><br><span class="line"> <span class="keyword">if</span> (result != <span class="keyword">null</span> && result.size() > <span class="number">0</span>) {</span><br><span class="line"> sum += result.size();</span><br><span class="line"> <span class="keyword">int</span> num = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span> (String key : result) {</span><br><span class="line"> pipeline.del(key);</span><br><span class="line"> num++;</span><br><span class="line"> <span class="keyword">if</span> (num > <span class="number">500</span>) {</span><br><span class="line"> num = <span class="number">0</span>;</span><br><span class="line"> pipeline.sync();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (num > <span class="number">0</span>) {</span><br><span class="line"> pipeline.sync();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> cursor = scanResult.getStringCursor();
1787</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">while</span> (!cursor.equals(<span class="string">"0"</span>));</span><br><span class="line"> <span class="keyword">if</span> (pipeline != <span class="keyword">null</span>) {</span><br><span class="line"> pipeline.close();</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> log.error(<span class="string">"delete key error:"</span>, e);</span><br><span class="line"> } <span class="keyword">finally</span> {</span><br><span class="line"> countDownLatch.countDown();</span><br><span class="line"> jedis.close();</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> sum;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure> 1788 1789 1790 1791 </div> 1792 <!-- ç¸å ³æç« æ¨è --> 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 <footer class="post-footer"> 1805 1806 1807 1808 1809 1810 1811 1812 1813 <div class="post-eof"></div> 1814 1815 </footer> 1816 </div> 1817 1818 1819 1820 </article> 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"> 1833 1834 1835 1836 <div class="post-block"> 1837 <link itemprop="mainEntityOfPage" href="https://huyunshun.com/2019/08/26/3%E3%80%81%E5%86%85%E5%AD%98%E4%BA%A4%E4%BA%92/"> 1838 1839 <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"> 1840 <meta itemprop="name" content="忍"> 1841 <meta itemprop="description" content=""> 1842 <meta itemprop="image" content="https://img.huyunshun.com/img/20200522182348.png"> 1843 </span> 1844 1845 <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"> 1846 <meta itemprop="name" content="ç®"> 1847 </span> 1848 1849 1850 <header class="post-header"> 1851 1852 1853 1854 <h1 class="post-title" itemprop="name headline"> 1855 1856 <a class="post-title-link" href="/2019/08/26/3%E3%80%81%E5%86%85%E5%AD%98%E4%BA%A4%E4%BA%92/" itemprop="url">jvmæ·±å ¥-å å交äº</a></h1> 1857 1858 1859 <div class="post-meta"> 1860 <span class="post-time"> 1861 1862 <span class="post-meta-item-icon"> 1863 <i class="fa fa-calendar-o"></i> 1864 </span> 1865 1866 <span class="post-meta-item-text">å表äº</span> 1867 1868 <time title="å建äº" itemprop="dateCreated datePublished" datetime="2019-08-26T00:00:00+08:00"> 1869 2019-08-26 1870 </time> 1871 1872 1873 1874 1875 1876 </span> 1877 1878 1879 <span class="post-category" > 1880 1881 <span class="post-meta-divider">|</span> 1882 1883 <span class="post-meta-item-icon"> 1884 <i class="fa fa-folder-o"></i> 1885 </span> 1886 1887 <span class="post-meta-item-text">åç±»äº</span> 1888 1889 1890 <span itemprop="about" itemscope itemtype="http://schema.org/Thing"> 1891 <a href="/categories/java/" itemprop="url" rel="index"> 1892 <span itemprop="name">java</span> 1893 </a> 1894 </span> 1895 1896 1897 1898 1899 </span> 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 </div> 1916 </header> 1917 1918 1919 1920 1921 1922 <div class="post-body" itemprop="articleBody"> 1923 1924 1925 1926 1927 1928 1929 1930 <p>æ¯ä¸ä¸ªçº¿ç¨æä¸ä¸ªå·¥ä½å åãå·¥ä½å åå主åç¬ç«ãå·¥ä½å å忾䏻åä¸åéçå¼çæ·è´ã</p> 1931<p><img src="https://img.huyunshun.com/img/20200423161045.png" alt="20200423161045"></p> 1932<p>彿°æ®ä»ä¸»å åå¤å¶å°å·¥ä½å卿¶ï¼å¿ é¡»åºç°ä¸¤ä¸ªå¨ä½ï¼ç¬¬ä¸ï¼ç±ä¸»å åæ§è¡ç读ï¼readï¼æä½ï¼ç¬¬äºï¼ç±å·¥ä½å åæ§è¡çç¸åºçloadæä½ï¼å½æ°æ®ä»å·¥ä½å åæ·è´å°ä¸»å åæ¶ï¼ä¹åºç°ä¸¤ä¸ªæä½ï¼ç¬¬ä¸ä¸ªï¼ç±å·¥ä½å åæ§è¡çåå¨ï¼storeï¼æä½ï¼ç¬¬äºï¼ç±ä¸»å åæ§è¡çç¸åºçåï¼writeï¼æä½ã</p> 1933<p>æ¯ä¸ä¸ªæä½é½æ¯ååçï¼å³æ§è¡æé´ä¸ä¼è¢«ä¸æ</p> 1934<p>å¯¹äºæ®éåéï¼ä¸ä¸ªçº¿ç¨ä¸æ´æ°çå¼ï¼ä¸è½é©¬ä¸ååºå¨å ¶ä»åéä¸ã妿éè¦å¨å ¶ä»çº¿ç¨ä¸ç«å³å¯è§ï¼éè¦ä½¿ç¨volatileå ³é®åä½ä¸ºæ è¯ã</p> 1935<p><img src="https://img.huyunshun.com/img/20200423161055.png" alt="20200423161055"></p> 1936<p>1ãå¯è§æ§ï¼ä¸ä¸ªçº¿ç¨ä¿®æ¹äºåéï¼å ¶ä»çº¿ç¨å¯ä»¥ç«å³ç¥é</p> 1937<p>ä¿è¯å¯è§æ§çæ¹æ³ï¼</p> 1938<ul> 1939<li>volatile</li> 1940<li>synchronized ï¼unlockä¹åï¼ååéå¼å主åï¼</li> 1941<li>final(䏿¦åå§å宿ï¼å ¶ä»çº¿ç¨å°±å¯è§)</li> 1942</ul> 1943<p>2ãæåºæ§ï¼æ¬çº¿ç¨å ï¼æä½é½æ¯æåºçï¼çº¿ç¨å¤è§å¯ï¼æä½é½æ¯æ åºçã</p> 1944<p>3ãæä»¤éæï¼</p> 1945<p><img src="https://img.huyunshun.com/img/20200423161110.png" alt="20200423161110"></p> 1946<p>æä»¤éæï¼ç ´åäºçº¿ç¨é´çæåºæ§ï¼</p> 1947<p><img src="https://img.huyunshun.com/img/20200423161119.png" alt="20200423161119"></p> 1948<p>æä»¤éæï¼ä¿è¯æåºæ§çæ¹æ³ï¼</p> 1949<p><img src="https://img.huyunshun.com/img/20200423161127.png" alt="20200423161127"></p> 1950<p>æä»¤éæçåºæ¬ååï¼</p> 1951<p>ç¨åºé¡ºåºååï¼ä¸ä¸ªçº¿ç¨å ä¿è¯è¯ä¹çä¸²è¡æ§</p> 1952<p>
1952volatileè§åï¼volatileåéçåï¼å åçäºè¯»</p> 1953<p>éè§åï¼è§£é(unlock)å¿ ç¶åçå¨éåçå é(lock)å</p> 1954<p>ä¼ éæ§ï¼Aå äºBï¼Bå äºC é£ä¹Aå¿ ç¶å äºC</p> 1955<p>线ç¨çstartæ¹æ³å äºå®çæ¯ä¸ä¸ªå¨ä½</p> 1956<p>线ç¨çæææä½å äºçº¿ç¨çç»ç»ï¼Thread.join()ï¼</p> 1957<p>线ç¨ç䏿ï¼interrupt()ï¼å äºè¢«ä¸æçº¿ç¨ç代ç </p> 1958<p>对象çæé 彿°æ§è¡ç»æå äºfinalize()æ¹æ³</p> 1959 1960 1961 1962 1963 </div> 1964 <!-- ç¸å ³æç« æ¨è --> 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 <footer class="post-footer"> 1977 1978 1979 1980 1981 1982 1983 1984 1985 <div class="post-eof"></div> 1986 1987 </footer> 1988 </div> 1989 1990 1991 1992 </article> 1993 1994 1995 1996 </section> 1997 1998 1999 <nav class="pagination"> 2000 <span class="page-number current">1</span><a class="page-number" href="/page/2/">2</a><span class="space">…</span><a class="page-number" href="/page/25/">25</a><a class="extend next" rel="next" href="/page/2/">ä¸ä¸é¡µ</a> 2001 </nav> 2002 2003 2004 2005 </div> 2006 2007 2008 2009 2010 2011 </div> 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