{"id":78565,"date":"2026-02-27T22:29:50","date_gmt":"2026-02-27T14:29:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78565.html"},"modified":"2026-02-27T22:29:50","modified_gmt":"2026-02-27T14:29:50","slug":"hadoop%e6%a0%b8%e5%bf%83%e6%8a%80%e6%9c%af%e4%b8%8e%e5%ae%9e%e6%88%98%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78565.html","title":{"rendered":"Hadoop\u6838\u5fc3\u6280\u672f\u4e0e\u5b9e\u6218\u6307\u5357"},"content":{"rendered":"<h2>Hadoop\u5b66\u4e60\u7b14\u8bb0<\/h2>\n<h2>\u4e00\u3001Hadoop\u57fa\u7840\u8ba4\u77e5<\/h2>\n<h3>1.1 \u4ec0\u4e48\u662fHadoop<\/h3>\n<p>Hadoop\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u3001\u5206\u5e03\u5f0f\u7684\u5927\u6570\u636e\u5904\u7406\u6846\u67b6&#xff0c;\u7531Apache\u57fa\u91d1\u4f1a\u5f00\u53d1&#xff0c;\u6838\u5fc3\u76ee\u6807\u662f\u9ad8\u6548\u5904\u7406\u6d77\u91cf\u6570\u636e&#xff08;TB\/PB\u7ea7&#xff09;&#xff0c;\u9002\u7528\u4e8e\u6570\u636e\u91cf\u5927\u3001\u6570\u636e\u7c7b\u578b\u590d\u6742&#xff08;\u7ed3\u6784\u5316\u3001\u534a\u7ed3\u6784\u5316\u3001\u975e\u7ed3\u6784\u5316&#xff09;\u3001\u5b9e\u65f6\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f&#xff08;\u79bb\u7ebf\u8ba1\u7b97&#xff09;\u3002<\/p>\n<p>\u6838\u5fc3\u4f18\u52bf&#xff1a;\u9ad8\u53ef\u9760\u6027&#xff08;\u591a\u526f\u672c\u5b58\u50a8&#xff09;\u3001\u9ad8\u6269\u5c55\u6027&#xff08;\u6a2a\u5411\u6269\u5c55\u8282\u70b9&#xff09;\u3001\u9ad8\u5bb9\u9519\u6027&#xff08;\u8282\u70b9\u6545\u969c\u4e0d\u5f71\u54cd\u6574\u4f53\u4efb\u52a1&#xff09;\u3001\u4f4e\u6210\u672c&#xff08;\u57fa\u4e8e\u666e\u901a\u670d\u52a1\u5668\u96c6\u7fa4&#xff0c;\u65e0\u9700\u9ad8\u7aef\u786c\u4ef6&#xff09;\u3002<\/p>\n<h3>1.2 Hadoop\u7684\u8d77\u6e90\u4e0e\u53d1\u5c55<\/h3>\n<p>\u6e90\u4e8eGoogle\u7684\u4e09\u7bc7\u6838\u5fc3\u8bba\u6587&#xff08;\u5927\u6570\u636e\u9886\u57df\u7684\u201c\u4e09\u5927\u652f\u67f1\u201d&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>GFS&#xff08;Google File System&#xff09;&#xff1a;\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf&#xff0c;\u5bf9\u5e94Hadoop\u7684HDFS&#xff1b;<\/p>\n<\/li>\n<li>\n<p>MapReduce&#xff1a;\u5206\u5e03\u5f0f\u8ba1\u7b97\u6a21\u578b&#xff0c;\u5bf9\u5e94Hadoop\u7684MapReduce&#xff1b;<\/p>\n<\/li>\n<li>\n<p>BigTable&#xff1a;\u5206\u5e03\u5f0f\u6570\u636e\u5e93&#xff0c;\u5bf9\u5e94Hadoop\u7684HBase\u3002<\/p>\n<\/li>\n<\/ul>\n<p>Apache Hadoop\u7248\u672c\u6f14\u8fdb&#xff1a;\u4e3b\u8981\u5206\u4e3a1.x\u30012.x\u30013.x\u4e09\u4e2a\u7cfb\u5217&#xff0c;\u76ee\u524d\u4e3b\u6d41\u4f7f\u75283.x\u7248\u672c&#xff08;\u89e3\u51b32.x\u7684\u6027\u80fd\u74f6\u9888&#xff0c;\u652f\u6301\u66f4\u591a\u8282\u70b9\u3001\u66f4\u9ad8\u6548\u7684\u8ba1\u7b97\u5f15\u64ce&#xff09;\u3002<\/p>\n<h3>1.3 Hadoop\u751f\u6001\u7cfb\u7edf&#xff08;\u6838\u5fc3\u7ec4\u4ef6&#043;\u5468\u8fb9\u5de5\u5177&#xff09;<\/h3>\n<p>Hadoop\u6838\u5fc33\u5927\u7ec4\u4ef6&#xff08;Hadoop Core&#xff09;&#xff1a;HDFS&#xff08;\u5b58\u50a8&#xff09;\u3001MapReduce&#xff08;\u8ba1\u7b97&#xff09;\u3001YARN&#xff08;\u8d44\u6e90\u8c03\u5ea6&#xff09;&#xff1b;<\/p>\n<p>\u5468\u8fb9\u751f\u6001\u5de5\u5177&#xff08;\u5e38\u7528&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>HBase&#xff1a;\u5206\u5e03\u5f0f\u5217\u5f0f\u6570\u636e\u5e93&#xff0c;\u7528\u4e8e\u5b9e\u65f6\u67e5\u8be2\u6d77\u91cf\u7ed3\u6784\u5316\u6570\u636e&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Hive&#xff1a;\u6570\u636e\u4ed3\u5e93\u5de5\u5177&#xff0c;\u5c06SQL\u8f6c\u6362\u4e3aMapReduce\/YARN\u4efb\u52a1&#xff0c;\u9002\u7528\u4e8e\u79bb\u7ebf\u6570\u636e\u5206\u6790&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Spark&#xff1a;\u5feb\u901f\u901a\u7528\u7684\u5206\u5e03\u5f0f\u8ba1\u7b97\u5f15\u64ce&#xff0c;\u901f\u5ea6\u8fdc\u8d85MapReduce&#xff0c;\u53ef\u66ff\u4ee3MapReduce\u4f5c\u4e3a\u8ba1\u7b97\u6838\u5fc3&#xff1b;<\/p>\n<\/li>\n<li>\n<p>ZooKeeper&#xff1a;\u5206\u5e03\u5f0f\u534f\u8c03\u5de5\u5177&#xff0c;\u8d1f\u8d23\u96c6\u7fa4\u7684\u8282\u70b9\u7ba1\u7406\u3001\u9009\u4e3e\u3001\u914d\u7f6e\u540c\u6b65&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Flume&#xff1a;\u65e5\u5fd7\u6536\u96c6\u5de5\u5177&#xff0c;\u7528\u4e8e\u91c7\u96c6\u3001\u805a\u5408\u3001\u4f20\u8f93\u6d77\u91cf\u65e5\u5fd7\u6570\u636e&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Sqoop&#xff1a;\u6570\u636e\u8fc1\u79fb\u5de5\u5177&#xff0c;\u5b9e\u73b0Hadoop\u4e0e\u5173\u7cfb\u578b\u6570\u636e\u5e93&#xff08;MySQL\u3001Oracle&#xff09;\u4e4b\u95f4\u7684\u6570\u636e\u5bfc\u5165\/\u5bfc\u51fa\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u4e8c\u3001Hadoop\u6838\u5fc3\u7ec4\u4ef6\u8be6\u89e3<\/h2>\n<h3>2.1 HDFS&#xff08;Hadoop Distributed File System&#xff09;\u2014\u2014\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf<\/h3>\n<h4>2.1.1 \u6838\u5fc3\u4f5c\u7528<\/h4>\n<p>\u8d1f\u8d23\u5c06\u6d77\u91cf\u6570\u636e\u5206\u5e03\u5f0f\u5b58\u50a8\u5728\u96c6\u7fa4\u7684\u591a\u4e2a\u8282\u70b9\u4e0a&#xff0c;\u7a81\u7834\u5355\u53f0\u670d\u52a1\u5668\u7684\u5b58\u50a8\u5bb9\u91cf\u9650\u5236&#xff0c;\u540c\u65f6\u901a\u8fc7\u591a\u526f\u672c\u673a\u5236\u4fdd\u8bc1\u6570\u636e\u53ef\u9760\u6027\u3002<\/p>\n<h4>2.1.2 \u67b6\u6784\u6a21\u578b&#xff08;\u4e3b\u4ece\u67b6\u6784 Master\/Slave&#xff09;<\/h4>\n<p>HDFS\u75313\u4e2a\u6838\u5fc3\u89d2\u8272\u7ec4\u6210&#xff0c;\u91c7\u7528\u201c\u4e00\u4e3b\u591a\u4ece\u201d\u67b6\u6784&#xff1a;<\/p>\n<li>\n<p>NameNode&#xff08;NN&#xff0c;\u4e3b\u8282\u70b9&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u7ba1\u7406\u6587\u4ef6\u7cfb\u7edf\u7684\u5143\u6570\u636e&#xff08;\u6587\u4ef6\u540d\u3001\u8def\u5f84\u3001\u6587\u4ef6\u5927\u5c0f\u3001\u5757\u4fe1\u606f\u3001\u526f\u672c\u6570\u91cf\u7b49&#xff09;&#xff0c;\u4e0d\u5b58\u50a8\u5b9e\u9645\u6570\u636e&#xff1b;<\/p>\n<p>   &#8211; \u7279\u70b9&#xff1a;\u6574\u4e2a\u96c6\u7fa4\u53ea\u67091\u4e2a\u6d3b\u8dc3\u7684NameNode&#xff08;3.x\u652f\u6301HA\u9ad8\u53ef\u7528&#xff0c;\u53ef\u90e8\u7f72\u5907\u7528NN&#xff09;&#xff0c;\u662f\u96c6\u7fa4\u7684\u201c\u5927\u8111\u201d&#xff0c;\u82e5NN\u6545\u969c&#xff0c;\u6574\u4e2aHDFS\u96c6\u7fa4\u65e0\u6cd5\u4f7f\u7528&#xff1b;<\/p>\n<p>   &#8211; \u5143\u6570\u636e\u5b58\u50a8&#xff1a;\u9ed8\u8ba4\u5b58\u50a8\u5728\u5185\u5b58\u4e2d&#xff08;\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6&#xff09;&#xff0c;\u540c\u65f6\u6301\u4e45\u5316\u5230\u672c\u5730\u78c1\u76d8\u7684fsimage&#xff08;\u955c\u50cf\u6587\u4ef6&#xff09;\u548cedits&#xff08;\u65e5\u5fd7\u6587\u4ef6&#xff09;\u4e2d\u3002<\/p>\n<\/li>\n<li>\n<p>DataNode&#xff08;DN&#xff0c;\u4ece\u8282\u70b9&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u5b58\u50a8\u5b9e\u9645\u7684\u6570\u636e\u5757&#xff08;Block&#xff09;&#xff0c;\u6267\u884cNameNode\u4e0b\u8fbe\u7684\u8bfb\u5199\u6307\u4ee4&#xff08;\u4e0a\u4f20\u3001\u4e0b\u8f7d\u6570\u636e&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u7279\u70b9&#xff1a;\u96c6\u7fa4\u4e2d\u6709\u591a\u4e2aDataNode&#xff08;\u53ef\u6a2a\u5411\u6269\u5c55&#xff09;&#xff0c;\u6bcf\u4e2aDN\u5c06\u6570\u636e\u5b58\u50a8\u5728\u672c\u5730\u78c1\u76d8\u4e0a&#xff1b;<\/p>\n<p>   &#8211; \u6570\u636e\u5757&#xff08;Block&#xff09;&#xff1a;HDFS\u9ed8\u8ba4\u5757\u5927\u5c0f&#xff08;3.x&#xff09;\u4e3a128MB&#xff08;\u53ef\u914d\u7f6e&#xff09;&#xff0c;\u5c06\u5927\u6587\u4ef6\u5206\u5272\u6210\u591a\u4e2a\u5c0fBlock\u5206\u5e03\u5f0f\u5b58\u50a8&#xff0c;\u5c0f\u5757\u4fbf\u4e8e\u5e76\u884c\u5904\u7406\u548c\u5bb9\u9519\u3002<\/p>\n<\/li>\n<li>\n<p>SecondaryNameNode&#xff08;SNN&#xff0c; Secondary NN&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u8f85\u52a9NameNode\u7ba1\u7406\u5143\u6570\u636e&#xff0c;\u5b9a\u671f\u5408\u5e76fsimage\u548cedits\u6587\u4ef6&#xff0c;\u751f\u6210\u65b0\u7684fsimage&#xff0c;\u51cf\u8f7bNN\u7684\u8d1f\u62c5&#xff1b;<\/p>\n<p>   &#8211; \u6ce8\u610f&#xff1a;SNN\u4e0d\u662fNN\u7684\u5907\u7528\u8282\u70b9&#xff08;\u4e0d\u80fd\u66ff\u4ee3NN\u5de5\u4f5c&#xff09;&#xff0c;3.x\u4e2d\u53ef\u7ed3\u5408HA\u673a\u5236\u90e8\u7f72&#xff0c;\u907f\u514dNN\u5355\u70b9\u6545\u969c\u3002<\/p>\n<\/li>\n<h4>2.1.3 \u5173\u952e\u673a\u5236<\/h4>\n<ul>\n<li>\n<p>\u526f\u672c\u673a\u5236&#xff1a;\u9ed8\u8ba4\u526f\u672c\u6570\u4e3a3&#xff0c;1\u4e2a\u526f\u672c\u5b58\u50a8\u5728\u672c\u5730\u8282\u70b9&#xff0c;1\u4e2a\u526f\u672c\u5b58\u50a8\u5728\u540c\u673a\u67b6\u7684\u5176\u4ed6\u8282\u70b9&#xff0c;1\u4e2a\u526f\u672c\u5b58\u50a8\u5728\u4e0d\u540c\u673a\u67b6\u7684\u8282\u70b9&#xff0c;\u4fdd\u8bc1\u8282\u70b9\/\u673a\u67b6\u6545\u969c\u65f6\u6570\u636e\u4e0d\u4e22\u5931&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u673a\u67b6\u611f\u77e5&#xff1a;HDFS\u4f1a\u8bc6\u522b\u8282\u70b9\u6240\u5728\u7684\u673a\u67b6&#xff0c;\u4f18\u5316\u6570\u636e\u5b58\u50a8\u548c\u8bfb\u53d6\u8def\u5f84&#xff0c;\u51cf\u5c11\u8de8\u673a\u67b6\u7684\u6570\u636e\u4f20\u8f93&#xff08;\u964d\u4f4e\u7f51\u7edc\u5e26\u5bbd\u538b\u529b&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8bfb\u5199\u6d41\u7a0b&#xff1a;<\/p>\n<p>    &#8211; \u5199\u6d41\u7a0b&#xff1a;\u5ba2\u6237\u7aef \u2192 NameNode&#xff08;\u7533\u8bf7\u5b58\u50a8\u8def\u5f84\u548cBlock\u5206\u914d&#xff09; \u2192 DataNode&#xff08;\u6309\u526f\u672c\u673a\u5236\u5199\u5165\u6570\u636e&#xff09; \u2192 \u53cd\u9988\u5199\u5165\u7ed3\u679c\u7ed9NN&#xff1b;<\/p>\n<p>    &#8211; \u8bfb\u6d41\u7a0b&#xff1a;\u5ba2\u6237\u7aef \u2192 NameNode&#xff08;\u67e5\u8be2\u5143\u6570\u636e&#xff0c;\u83b7\u53d6Block\u6240\u5728\u7684DN\u8282\u70b9&#xff09; \u2192 \u76f4\u63a5\u4eceDN\u8bfb\u53d6\u6570\u636e&#xff08;\u65e0\u9700\u7ecf\u8fc7NN&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>2.2 MapReduce\u2014\u2014\u5206\u5e03\u5f0f\u8ba1\u7b97\u6a21\u578b<\/h3>\n<h4>2.2.1 \u6838\u5fc3\u4f5c\u7528<\/h4>\n<p>\u57fa\u4e8e\u201c\u5206\u800c\u6cbb\u4e4b\u201d\u7684\u601d\u60f3&#xff0c;\u5c06\u6d77\u91cf\u6570\u636e\u7684\u8ba1\u7b97\u4efb\u52a1\u62c6\u5206\u6210\u591a\u4e2a\u5c0f\u4efb\u52a1&#xff0c;\u5206\u5e03\u5f0f\u8fd0\u884c\u5728\u96c6\u7fa4\u7684DataNode\u8282\u70b9\u4e0a&#xff0c;\u6700\u7ec8\u6c47\u603b\u6240\u6709\u5c0f\u4efb\u52a1\u7684\u7ed3\u679c&#xff0c;\u5f97\u5230\u6700\u7ec8\u8ba1\u7b97\u7ed3\u679c&#xff08;\u79bb\u7ebf\u8ba1\u7b97\u6838\u5fc3&#xff09;\u3002<\/p>\n<h4>2.2.2 \u6838\u5fc3\u601d\u60f3\u4e0e\u6d41\u7a0b<\/h4>\n<p>MapReduce\u7684\u8ba1\u7b97\u8fc7\u7a0b\u5206\u4e3a\u4e24\u4e2a\u6838\u5fc3\u9636\u6bb5&#xff1a;Map\u9636\u6bb5&#xff08;\u62c6\u5206\u8ba1\u7b97&#xff09;\u548cReduce\u9636\u6bb5&#xff08;\u6c47\u603b\u8ba1\u7b97&#xff09;&#xff0c;\u4e2d\u95f4\u5305\u542bShuffle\u9636\u6bb5&#xff08;\u6570\u636e\u5206\u53d1\u4e0e\u6392\u5e8f&#xff09;&#xff0c;\u6574\u4e2a\u6d41\u7a0b\u7531YARN\u8c03\u5ea6\u7ba1\u7406\u3002<\/p>\n<li>\n<p>Map\u9636\u6bb5&#xff08;\u6620\u5c04\u9636\u6bb5&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u8f93\u5165&#xff1a;HDFS\u4e2d\u7684\u6570\u636e\u5757&#xff08;Block&#xff09;&#xff0c;\u6309\u884c\u89e3\u6790\u4e3a\u952e\u503c\u5bf9&#xff08;Key-Value&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u5904\u7406&#xff1a;\u6bcf\u4e2aMap\u4efb\u52a1\u72ec\u7acb\u5904\u7406\u4e00\u4e2a\u6570\u636e\u5757&#xff0c;\u5bf9\u8f93\u5165\u7684\u952e\u503c\u5bf9\u8fdb\u884c\u8fc7\u6ee4\u3001\u8f6c\u6362&#xff0c;\u8f93\u51fa\u4e2d\u95f4\u952e\u503c\u5bf9&#xff08;Intermediate K-V&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u7279\u70b9&#xff1a;Map\u4efb\u52a1\u5e76\u884c\u6267\u884c&#xff0c;\u4e92\u4e0d\u4f9d\u8d56&#xff0c;\u65e0\u9700\u4ea4\u4e92\u3002<\/p>\n<\/li>\n<li>\n<p>Shuffle\u9636\u6bb5&#xff08;\u6d17\u724c\u9636\u6bb5&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3&#xff1a;\u5c06\u6240\u6709Map\u4efb\u52a1\u8f93\u51fa\u7684\u4e2d\u95f4\u952e\u503c\u5bf9&#xff0c;\u6309Key\u8fdb\u884c\u5206\u7ec4\u3001\u6392\u5e8f\u3001\u5408\u5e76&#xff0c;\u5206\u53d1\u5230\u5bf9\u5e94\u7684Reduce\u4efb\u52a1\u4e2d&#xff1b;<\/p>\n<p>   &#8211; \u5173\u952e\u64cd\u4f5c&#xff1a;\u5206\u533a&#xff08;Partition&#xff09;\u3001\u6392\u5e8f&#xff08;Sort&#xff09;\u3001\u5408\u5e76&#xff08;Combine&#xff09;\u3001\u5f52\u7ea6&#xff08;Reduce&#xff09;&#xff0c;\u662fMapReduce\u7684\u6027\u80fd\u74f6\u9888&#xff08;\u6d89\u53ca\u5927\u91cf\u6570\u636e\u4f20\u8f93\u548c\u78c1\u76d8IO&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>Reduce\u9636\u6bb5&#xff08;\u5f52\u7ea6\u9636\u6bb5&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u8f93\u5165&#xff1a;Shuffle\u9636\u6bb5\u5206\u53d1\u7684\u3001\u540c\u4e00Key\u5bf9\u5e94\u7684\u6240\u6709Value\u96c6\u5408&#xff1b;<\/p>\n<p>   &#8211; \u5904\u7406&#xff1a;\u5bf9\u540c\u4e00Key\u7684Value\u96c6\u5408\u8fdb\u884c\u805a\u5408\u3001\u8ba1\u7b97&#xff08;\u5982\u6c42\u548c\u3001\u8ba1\u6570\u3001\u53bb\u91cd&#xff09;&#xff0c;\u8f93\u51fa\u6700\u7ec8\u952e\u503c\u5bf9&#xff08;Final K-V&#xff09;&#xff0c;\u5199\u5165HDFS&#xff1b;<\/p>\n<p>   &#8211; \u7279\u70b9&#xff1a;Reduce\u4efb\u52a1\u5e76\u884c\u6267\u884c&#xff0c;\u4f9d\u8d56Shuffle\u9636\u6bb5\u7684\u7ed3\u679c&#xff0c;\u4e0d\u540cReduce\u4efb\u52a1\u7684\u8f93\u51fa\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n<\/li>\n<h4>2.2.3 \u6838\u5fc3\u7279\u70b9\u4e0e\u5c40\u9650\u6027<\/h4>\n<ul>\n<li>\n<p>\u7279\u70b9&#xff1a;\u6613\u4e8e\u7f16\u7a0b&#xff08;\u53ea\u9700\u5b9e\u73b0Map\u548cReduce\u51fd\u6570&#xff09;\u3001\u9ad8\u5bb9\u9519\u6027&#xff08;\u4efb\u52a1\u5931\u8d25\u81ea\u52a8\u91cd\u8bd5&#xff09;\u3001\u9ad8\u6269\u5c55\u6027&#xff08;\u652f\u6301\u5927\u89c4\u6a21\u96c6\u7fa4&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5c40\u9650\u6027&#xff1a;\u5b9e\u65f6\u6027\u5dee&#xff08;\u9002\u5408\u79bb\u7ebf\u8ba1\u7b97&#xff0c;\u5ef6\u8fdf\u5206\u949f\/\u5c0f\u65f6\u7ea7&#xff09;\u3001\u4e0d\u9002\u5408\u8fed\u4ee3\u8ba1\u7b97&#xff08;\u5982\u673a\u5668\u5b66\u4e60\u7b97\u6cd5&#xff09;\u3001Shuffle\u9636\u6bb5\u6027\u80fd\u74f6\u9888\u660e\u663e&#xff0c;\u76ee\u524d\u9010\u6e10\u88abSpark\u66ff\u4ee3\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>2.3 YARN&#xff08;Yet Another Resource Negotiator&#xff09;\u2014\u2014\u8d44\u6e90\u8c03\u5ea6\u4e0e\u4efb\u52a1\u7ba1\u7406\u6846\u67b6<\/h3>\n<h4>2.3.1 \u6838\u5fc3\u4f5c\u7528<\/h4>\n<p>Hadoop 2.x\u65b0\u589e\u7ec4\u4ef6&#xff0c;\u66ff\u4ee31.x\u4e2dMapReduce\u7684\u8d44\u6e90\u8c03\u5ea6\u529f\u80fd&#xff0c;\u5b9e\u73b0\u201c\u8d44\u6e90\u8c03\u5ea6\u4e0e\u8ba1\u7b97\u5206\u79bb\u201d&#xff0c;\u7edf\u4e00\u7ba1\u7406\u96c6\u7fa4\u7684CPU\u3001\u5185\u5b58\u3001\u78c1\u76d8\u7b49\u8d44\u6e90&#xff0c;\u4e3a\u5404\u7c7b\u8ba1\u7b97\u4efb\u52a1&#xff08;MapReduce\u3001Spark\u3001Hive\u7b49&#xff09;\u5206\u914d\u8d44\u6e90&#xff0c;\u8c03\u5ea6\u4efb\u52a1\u6267\u884c\u3002<\/p>\n<h4>2.3.2 \u67b6\u6784\u6a21\u578b&#xff08;\u4e3b\u4ece\u67b6\u6784&#xff09;<\/h4>\n<li>\n<p>ResourceManager&#xff08;RM&#xff0c;\u4e3b\u8282\u70b9&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u5168\u5c40\u8d44\u6e90\u8c03\u5ea6&#xff08;\u7ba1\u7406\u6574\u4e2a\u96c6\u7fa4\u7684\u8d44\u6e90\u603b\u91cf&#xff09;\u3001\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u4efb\u52a1\u63d0\u4ea4\u3001\u5206\u914d\u8d44\u6e90\u7ed9NodeManager\u3001\u76d1\u63a7NodeManager\u7684\u72b6\u6001&#xff1b;<\/p>\n<p>   &#8211; \u7ec4\u6210&#xff1a;\u8c03\u5ea6\u5668&#xff08;Scheduler&#xff09;\u548c\u5e94\u7528\u7a0b\u5e8f\u7ba1\u7406\u5668&#xff08;ApplicationsManager&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u8c03\u5ea6\u5668&#xff1a;\u53ea\u8d1f\u8d23\u8d44\u6e90\u5206\u914d&#xff0c;\u4e0d\u8d1f\u8d23\u4efb\u52a1\u76d1\u63a7\u548c\u5931\u8d25\u91cd\u8bd5&#xff08;\u5982FIFO\u8c03\u5ea6\u5668\u3001Capacity\u8c03\u5ea6\u5668\u3001Fair\u8c03\u5ea6\u5668&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>NodeManager&#xff08;NM&#xff0c;\u4ece\u8282\u70b9&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u7ba1\u7406\u5355\u4e2a\u8282\u70b9\u7684\u8d44\u6e90&#xff08;CPU\u3001\u5185\u5b58\u7b49&#xff09;\u3001\u6267\u884cResourceManager\u4e0b\u8fbe\u7684\u6307\u4ee4\u3001\u542f\u52a8\u548c\u76d1\u63a7\u5bb9\u5668&#xff08;Container&#xff09;\u3001\u5411RM\u6c47\u62a5\u8282\u70b9\u72b6\u6001&#xff1b;<\/p>\n<p>   &#8211; \u5bb9\u5668&#xff08;Container&#xff09;&#xff1a;YARN\u7684\u8d44\u6e90\u5206\u914d\u5355\u5143&#xff0c;\u5305\u542b\u4e00\u5b9a\u91cf\u7684CPU\u3001\u5185\u5b58&#xff0c;\u6bcf\u4e2a\u4efb\u52a1&#xff08;Map\/Reduce\/Spark\u4efb\u52a1&#xff09;\u90fd\u8fd0\u884c\u5728Container\u4e2d\u3002<\/p>\n<\/li>\n<li>\n<p>ApplicationMaster&#xff08;AM&#xff0c;\u5e94\u7528\u7a0b\u5e8f\u4e3b\u8282\u70b9&#xff09;&#xff1a;<\/p>\n<p>   &#8211; \u6838\u5fc3\u804c\u8d23&#xff1a;\u6bcf\u4e2a\u63d0\u4ea4\u7684\u8ba1\u7b97\u4efb\u52a1&#xff08;\u5982\u4e00\u4e2aMapReduce\u4efb\u52a1\u3001\u4e00\u4e2aSpark\u4efb\u52a1&#xff09;\u90fd\u4f1a\u5bf9\u5e94\u4e00\u4e2aAM&#xff0c;\u8d1f\u8d23\u4e0eRM\u534f\u5546\u8d44\u6e90\u3001\u5411NM\u7533\u8bf7Container\u3001\u8c03\u5ea6\u4efb\u52a1\u5728Container\u4e2d\u6267\u884c\u3001\u76d1\u63a7\u4efb\u52a1\u72b6\u6001&#xff08;\u5931\u8d25\u81ea\u52a8\u91cd\u8bd5&#xff09;\u3002<\/p>\n<\/li>\n<h4>2.3.3 \u6838\u5fc3\u6d41\u7a0b&#xff08;\u4efb\u52a1\u63d0\u4ea4\u4e0e\u6267\u884c&#xff09;<\/h4>\n<li>\n<p>\u5ba2\u6237\u7aef\u63d0\u4ea4\u8ba1\u7b97\u4efb\u52a1&#xff08;\u5982MapReduce\u4efb\u52a1&#xff09;\u5230ResourceManager&#xff1b;<\/p>\n<\/li>\n<li>\n<p>RM\u7684\u5e94\u7528\u7a0b\u5e8f\u7ba1\u7406\u5668\u4e3a\u4efb\u52a1\u5206\u914d\u7b2c\u4e00\u4e2aContainer&#xff0c;\u542f\u52a8ApplicationMaster&#xff1b;<\/p>\n<\/li>\n<li>\n<p>AM\u5411RM\u6ce8\u518c&#xff0c;\u7136\u540e\u5411RM\u534f\u5546\u540e\u7eed\u4efb\u52a1\u6240\u9700\u7684\u8d44\u6e90&#xff08;Container&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>RM\u5c06\u5206\u914d\u597d\u7684Container\u4fe1\u606f\u53cd\u9988\u7ed9AM&#xff1b;<\/p>\n<\/li>\n<li>\n<p>AM\u5411\u5bf9\u5e94\u7684NodeManager\u53d1\u9001\u6307\u4ee4&#xff0c;\u542f\u52a8Container\u5e76\u6267\u884c\u4efb\u52a1&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u4efb\u52a1\u6267\u884c\u5b8c\u6210\u540e&#xff0c;Container\u91ca\u653e\u8d44\u6e90&#xff0c;AM\u5411RM\u6c47\u62a5\u4efb\u52a1\u7ed3\u679c&#xff0c;RM\u6ce8\u9500AM\u3002<\/p>\n<\/li>\n<h2>\u4e09\u3001Hadoop\u73af\u5883\u642d\u5efa&#xff08;\u6838\u5fc3\u6b65\u9aa4&#xff09;<\/h2>\n<p>Hadoop\u73af\u5883\u642d\u5efa\u5206\u4e3a3\u79cd\u6a21\u5f0f&#xff0c;\u91cd\u70b9\u638c\u63e1\u4f2a\u5206\u5e03\u5f0f\u6a21\u5f0f&#xff08;\u5355\u673a\u6a21\u62df\u96c6\u7fa4&#xff0c;\u9002\u5408\u5b66\u4e60&#xff09;&#xff1a;<\/p>\n<h3>3.1 \u73af\u5883\u51c6\u5907&#xff08;\u524d\u7f6e\u6761\u4ef6&#xff09;<\/h3>\n<ul>\n<li>\n<p>\u64cd\u4f5c\u7cfb\u7edf&#xff1a;Linux&#xff08;\u63a8\u8350CentOS 7\/8&#xff0c;Hadoop\u5bf9Windows\u652f\u6301\u8f83\u5dee&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>JDK&#xff1a;Hadoop\u4f9d\u8d56Java\u73af\u5883&#xff0c;\u9700\u5b89\u88c5JDK 8&#xff08;\u5bf9\u5e94Hadoop 3.x&#xff0c;\u7248\u672c\u9700\u5339\u914d&#xff09;&#xff0c;\u914d\u7f6eJAVA_HOME\u73af\u5883\u53d8\u91cf&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5173\u95ed\u9632\u706b\u5899&#xff1a;\u907f\u514d\u96c6\u7fa4\u8282\u70b9\u4e4b\u95f4\u901a\u4fe1\u53d7\u963b&#xff08;\u5b66\u4e60\u73af\u5883\u53ef\u76f4\u63a5\u5173\u95ed&#xff0c;\u751f\u4ea7\u73af\u5883\u9700\u914d\u7f6e\u9632\u706b\u5899\u89c4\u5219&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u514d\u5bc6\u767b\u5f55&#xff1a;\u914d\u7f6eLinux\u672c\u673a\u514d\u5bc6\u767b\u5f55&#xff08;\u4f2a\u5206\u5e03\u5f0f\u6a21\u5f0f\u9700\u767b\u5f55\u672c\u673a&#xff09;&#xff0c;\u96c6\u7fa4\u6a21\u5f0f\u9700\u914d\u7f6e\u6240\u6709\u8282\u70b9\u4e4b\u95f4\u514d\u5bc6\u767b\u5f55&#xff08;ssh\u5bc6\u94a5\u914d\u7f6e&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>3.2 \u4f2a\u5206\u5e03\u5f0f\u6a21\u5f0f\u642d\u5efa&#xff08;\u6838\u5fc3\u6b65\u9aa4&#xff09;<\/h3>\n<li>\n<p>\u4e0b\u8f7dHadoop\u5b89\u88c5\u5305&#xff1a;\u4eceApache Hadoop\u5b98\u7f51\u4e0b\u8f7d\u5bf9\u5e94\u7248\u672c&#xff08;\u5982hadoop-3.3.4.tar.gz&#xff09;&#xff0c;\u89e3\u538b\u5230\u6307\u5b9a\u76ee\u5f55&#xff08;\u5982\/opt\/hadoop&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e\u73af\u5883\u53d8\u91cf&#xff1a;\u4fee\u6539\/etc\/profile\u6587\u4ef6&#xff0c;\u6dfb\u52a0HADOOP_HOME\u3001PATH\u7b49\u73af\u5883\u53d8\u91cf&#xff0c;\u4f7f\u7cfb\u7edf\u80fd\u8bc6\u522bhadoop\u547d\u4ee4&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u4fee\u6539Hadoop\u6838\u5fc3\u914d\u7f6e\u6587\u4ef6&#xff08;\u4f4d\u4e8e$HADOOP_HOME\/etc\/hadoop\u76ee\u5f55&#xff09;&#xff1a;<\/p>\n<p>   &#8211; core-site.xml&#xff1a;\u914d\u7f6eHDFS\u7684NameNode\u5730\u5740\u3001\u4e34\u65f6\u6587\u4ef6\u5b58\u50a8\u76ee\u5f55&#xff1b;<\/p>\n<p>   &#8211; hdfs-site.xml&#xff1a;\u914d\u7f6e\u526f\u672c\u6570\u91cf&#xff08;\u4f2a\u5206\u5e03\u5f0f\u8bbe\u4e3a1&#xff09;\u3001NameNode\u548cDataNode\u7684\u6570\u636e\u5b58\u50a8\u76ee\u5f55&#xff1b;<\/p>\n<p>   &#8211; mapred-site.xml&#xff1a;\u914d\u7f6eMapReduce\u7684\u6846\u67b6&#xff08;\u6307\u5b9a\u4e3ayarn&#xff09;&#xff1b;<\/p>\n<p>   &#8211; yarn-site.xml&#xff1a;\u914d\u7f6eYARN\u7684ResourceManager\u5730\u5740\u3001\u8282\u70b9\u7ba1\u7406\u5668\u7684\u8d44\u6e90\u5206\u914d&#xff08;CPU\u3001\u5185\u5b58&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u683c\u5f0f\u5316HDFS&#xff1a;\u9996\u6b21\u642d\u5efa\u9700\u683c\u5f0f\u5316NameNode&#xff08;\u6267\u884chdfs namenode -format&#xff09;&#xff0c;\u683c\u5f0f\u5316\u540e\u4f1a\u751f\u6210\u5143\u6570\u636e\u5b58\u50a8\u76ee\u5f55&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u542f\u52a8Hadoop\u96c6\u7fa4&#xff1a;<\/p>\n<p>   &#8211; \u542f\u52a8HDFS&#xff1a;\u6267\u884cstart-dfs.sh&#xff08;\u542f\u52a8NameNode\u3001DataNode\u3001SecondaryNameNode&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u542f\u52a8YARN&#xff1a;\u6267\u884cstart-yarn.sh&#xff08;\u542f\u52a8ResourceManager\u3001NodeManager&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u67e5\u770b\u96c6\u7fa4\u72b6\u6001&#xff1a;\u6267\u884cjps\u547d\u4ee4&#xff0c;\u67e5\u770b\u6240\u6709\u6838\u5fc3\u8fdb\u7a0b\u662f\u5426\u542f\u52a8\u6210\u529f\u3002<\/p>\n<\/li>\n<li>\n<p>\u9a8c\u8bc1\u73af\u5883&#xff1a;<\/p>\n<p>   &#8211; \u8bbf\u95eeHDFS Web\u754c\u9762&#xff1a;http:\/\/\u865a\u62df\u673aIP:9870&#xff0c;\u67e5\u770bHDFS\u96c6\u7fa4\u72b6\u6001&#xff1b;<\/p>\n<p>   &#8211; \u8bbf\u95eeYARN Web\u754c\u9762&#xff1a;http:\/\/\u865a\u62df\u673aIP:8088&#xff0c;\u67e5\u770bYARN\u96c6\u7fa4\u72b6\u6001&#xff1b;<\/p>\n<p>   &#8211; \u8fd0\u884c\u5b98\u65b9\u793a\u4f8b\u7a0b\u5e8f&#xff08;\u5982WordCount&#xff09;&#xff0c;\u9a8c\u8bc1MapReduce\u4efb\u52a1\u80fd\u5426\u6b63\u5e38\u6267\u884c\u3002<\/p>\n<\/li>\n<h3>3.3 \u5e38\u89c1\u95ee\u9898<\/h3>\n<ul>\n<li>\n<p>JDK\u7248\u672c\u4e0d\u5339\u914d&#xff1a;Hadoop 3.x\u9700JDK 8&#xff0c;\u82e5\u4f7f\u7528JDK 11\u53ca\u4ee5\u4e0a\u4f1a\u62a5\u9519&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u514d\u5bc6\u767b\u5f55\u914d\u7f6e\u5931\u8d25&#xff1a;\u5bfc\u81f4start-dfs.sh\u542f\u52a8\u65f6\u63d0\u793a\u8f93\u5165\u5bc6\u7801&#xff0c;\u9700\u91cd\u65b0\u914d\u7f6essh\u5bc6\u94a5&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u683c\u5f0f\u5316HDFS\u5931\u8d25&#xff1a;\u82e5\u591a\u6b21\u683c\u5f0f\u5316&#xff0c;\u4f1a\u5bfc\u81f4NameNode\u548cDataNode\u7684clusterID\u4e0d\u4e00\u81f4&#xff0c;\u9700\u5220\u9664\u6570\u636e\u5b58\u50a8\u76ee\u5f55\u540e\u91cd\u65b0\u683c\u5f0f\u5316&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8fdb\u7a0b\u542f\u52a8\u5931\u8d25&#xff1a;\u67e5\u770b$HADOOP_HOME\/logs\u76ee\u5f55\u4e0b\u7684\u65e5\u5fd7\u6587\u4ef6&#xff0c;\u5b9a\u4f4d\u9519\u8bef\u539f\u56e0&#xff08;\u5982\u914d\u7f6e\u6587\u4ef6\u5199\u9519\u3001\u7aef\u53e3\u5360\u7528&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u56db\u3001Hadoop\u6838\u5fc3\u64cd\u4f5c&#xff08;\u547d\u4ee4\u884c&#043;\u5b9e\u64cd&#xff09;<\/h2>\n<h3>4.1 HDFS\u547d\u4ee4\u884c\u64cd\u4f5c&#xff08;\u5e38\u7528&#xff09;<\/h3>\n<p>HDFS\u547d\u4ee4\u683c\u5f0f&#xff1a;hdfs dfs -\u547d\u4ee4 \u53c2\u6570<\/p>\n<ul>\n<li>\n<p>\u76ee\u5f55\u64cd\u4f5c&#xff1a;<\/p>\n<p>    &#8211; \u521b\u5efa\u76ee\u5f55&#xff1a;hdfs dfs -mkdir \/test&#xff08;\u521b\u5efa\u6839\u76ee\u5f55\u4e0b\u7684test\u76ee\u5f55&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u76ee\u5f55&#xff1a;hdfs dfs -ls \/&#xff08;\u67e5\u770b\u6839\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u5185\u5bb9&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u5220\u9664\u76ee\u5f55&#xff1a;hdfs dfs -rm -r \/test&#xff08;\u9012\u5f52\u5220\u9664test\u76ee\u5f55&#xff0c;\u5305\u62ec\u76ee\u5f55\u5185\u6587\u4ef6&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u6587\u4ef6\u64cd\u4f5c&#xff1a;<\/p>\n<p>    &#8211; \u4e0a\u4f20\u6587\u4ef6&#xff1a;hdfs dfs -put \u672c\u5730\u6587\u4ef6\u8def\u5f84 HDFS\u8def\u5f84&#xff08;\u5982hdfs dfs -put \/root\/test.txt \/test&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u4e0b\u8f7d\u6587\u4ef6&#xff1a;hdfs dfs -get HDFS\u6587\u4ef6\u8def\u5f84 \u672c\u5730\u8def\u5f84&#xff08;\u5982hdfs dfs -get \/test\/test.txt \/root&#xff09;&#xff1b;<\/p>\n<p>   &#8211; \u67e5\u770b\u6587\u4ef6\u5185\u5bb9&#xff1a;hdfs dfs -cat \/test\/test.txt&#xff1b;<\/p>\n<p>   &#8211; \u5220\u9664\u6587\u4ef6&#xff1a;hdfs dfs -rm \/test\/test.txt\u3002<\/p>\n<\/li>\n<li>\n<p>\u5176\u4ed6\u5e38\u7528\u547d\u4ee4&#xff1a;<\/p>\n<p>    &#8211; \u67e5\u770bHDFS\u78c1\u76d8\u4f7f\u7528\u60c5\u51b5&#xff1a;hdfs dfs -df -h&#xff1b;<\/p>\n<p>    &#8211; \u67e5\u770b\u6587\u4ef6\u526f\u672c\u6570&#xff1a;hdfs dfs -ls -h \/test\/test.txt&#xff1b;<\/p>\n<p>    &#8211; \u590d\u5236\u6587\u4ef6&#xff1a;hdfs dfs -cp \/test\/test.txt \/test2\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>4.2 MapReduce\u5b9e\u64cd&#xff08;WordCount\u793a\u4f8b&#xff09;<\/h3>\n<p>WordCount\u662fHadoop\u7684\u7ecf\u5178\u793a\u4f8b&#xff0c;\u529f\u80fd\u662f\u7edf\u8ba1\u6587\u672c\u6587\u4ef6\u4e2d\u6bcf\u4e2a\u5355\u8bcd\u51fa\u73b0\u7684\u6b21\u6570&#xff0c;\u5b8c\u6574\u6d41\u7a0b\u5982\u4e0b&#xff1a;<\/p>\n<li>\n<p>\u51c6\u5907\u8f93\u5165\u6570\u636e&#xff1a;\u5728\u672c\u5730\u521b\u5efa\u4e00\u4e2a\u6587\u672c\u6587\u4ef6&#xff08;\u5982words.txt&#xff09;&#xff0c;\u5199\u5165\u82e5\u5e72\u5355\u8bcd&#xff08;\u6bcf\u884c\u4e00\u4e2a\u6216\u591a\u4e2a\u5355\u8bcd&#xff0c;\u7528\u7a7a\u683c\u5206\u9694&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u4e0a\u4f20\u8f93\u5165\u6570\u636e\u5230HDFS&#xff1a;hdfs dfs -put \/root\/words.txt \/input&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8fd0\u884cWordCount\u7a0b\u5e8f&#xff08;Hadoop\u81ea\u5e26\u793a\u4f8b&#xff09;&#xff1a;<\/p>\n<p>   \u547d\u4ee4&#xff1a;hadoop jar $HADOOP_HOME\/share\/hadoop\/mapreduce\/hadoop-mapreduce-examples-3.3.4.jar wordcount \/input \/output<\/p>\n<p>   \u8bf4\u660e&#xff1a;\/input\u662f\u8f93\u5165\u6570\u636e\u5728HDFS\u7684\u8def\u5f84&#xff0c;\/output\u662f\u8f93\u51fa\u7ed3\u679c\u8def\u5f84&#xff08;\u5fc5\u987b\u662f\u4e0d\u5b58\u5728\u7684\u76ee\u5f55&#xff0c;\u5426\u5219\u62a5\u9519&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u8f93\u51fa\u7ed3\u679c&#xff1a;<\/p>\n<p>   &#8211; \u67e5\u770b\u8f93\u51fa\u76ee\u5f55&#xff1a;hdfs dfs -ls \/output&#xff1b;<\/p>\n<p>   &#8211; \u67e5\u770b\u7edf\u8ba1\u7ed3\u679c&#xff1a;hdfs dfs -cat \/output\/part-r-00000&#xff08;part-r-00000\u662fReduce\u9636\u6bb5\u7684\u8f93\u51fa\u6587\u4ef6&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5220\u9664\u8f93\u51fa\u76ee\u5f55&#xff08;\u4e0b\u6b21\u8fd0\u884c\u9700\u5220\u9664&#xff09;&#xff1a;hdfs dfs -rm -r \/output\u3002<\/p>\n<\/li>\n<h3>4.3 YARN\u5e38\u7528\u64cd\u4f5c<\/h3>\n<ul>\n<li>\n<p>\u67e5\u770bYARN\u96c6\u7fa4\u72b6\u6001&#xff1a;yarn node -list&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u6b63\u5728\u8fd0\u884c\u7684\u4efb\u52a1&#xff1a;yarn application -list&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u6740\u6b7b\u6b63\u5728\u8fd0\u884c\u7684\u4efb\u52a1&#xff1a;yarn application -kill \u4efb\u52a1ID&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u4efb\u52a1\u65e5\u5fd7&#xff1a;yarn logs -applicationId \u4efb\u52a1ID\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u4e94\u3001Hadoop\u8fdb\u9636\u77e5\u8bc6\u70b9<\/h2>\n<h3>5.1 HDFS\u9ad8\u53ef\u7528&#xff08;HA&#xff09;<\/h3>\n<p>Hadoop 1.x\u4e2dNameNode\u662f\u5355\u70b9\u6545\u969c&#xff0c;\u4e00\u65e6NN\u6545\u969c&#xff0c;\u6574\u4e2aHDFS\u96c6\u7fa4\u65e0\u6cd5\u4f7f\u7528\u3002Hadoop 3.x\u901a\u8fc7HA\u673a\u5236\u89e3\u51b3\u5355\u70b9\u6545\u969c&#xff0c;\u90e8\u7f72\u4e24\u4e2aNameNode&#xff08;Active NN\u548cStandby NN&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>Active NN&#xff1a;\u6b63\u5e38\u63d0\u4f9b\u5143\u6570\u636e\u7ba1\u7406\u548c\u8bfb\u5199\u670d\u52a1&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Standby NN&#xff1a;\u5b9e\u65f6\u540c\u6b65Active NN\u7684\u5143\u6570\u636e&#xff08;\u901a\u8fc7JournalNode\u96c6\u7fa4&#xff09;&#xff0c;\u5f53Active NN\u6545\u969c\u65f6&#xff0c;\u5feb\u901f\u5207\u6362\u4e3aActive\u72b6\u6001&#xff0c;\u4fdd\u8bc1\u96c6\u7fa4\u6b63\u5e38\u8fd0\u884c&#xff1b;<\/p>\n<\/li>\n<li>\n<p>JournalNode&#xff1a;\u7528\u4e8e\u5b58\u50a8Active NN\u7684edits\u65e5\u5fd7&#xff0c;\u4f9bStandby NN\u540c\u6b65&#xff0c;\u81f3\u5c11\u90e8\u7f723\u4e2a\u8282\u70b9\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.2 HDFS Federation&#xff08;\u8054\u90a6&#xff09;<\/h3>\n<p>\u89e3\u51b3\u5355\u4e00NameNode\u7684\u5185\u5b58\u74f6\u9888\u548c\u6269\u5c55\u6027\u95ee\u9898&#xff0c;\u90e8\u7f72\u591a\u4e2a\u72ec\u7acb\u7684NameNode&#xff08;\u6bcf\u4e2aNN\u7ba1\u7406\u4e00\u90e8\u5206\u76ee\u5f55&#xff0c;\u79f0\u4e3aNamespace&#xff09;&#xff0c;\u5171\u4eab\u6240\u6709DataNode\u7684\u5b58\u50a8\u8d44\u6e90&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6bcf\u4e2aNameNode\u72ec\u7acb\u7ba1\u7406\u81ea\u5df1\u7684\u5143\u6570\u636e&#xff0c;\u4e92\u4e0d\u5e72\u6270&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5ba2\u6237\u7aef\u901a\u8fc7\u6302\u8f7d\u8868&#xff08;Mount Table&#xff09;\u8bbf\u95ee\u4e0d\u540cNameNode\u7ba1\u7406\u7684\u76ee\u5f55&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u4e8e\u8d85\u5927\u89c4\u6a21\u96c6\u7fa4&#xff08;\u8282\u70b9\u6570\u6210\u5343\u4e0a\u4e07&#xff09;&#xff0c;\u63d0\u9ad8\u96c6\u7fa4\u7684\u6269\u5c55\u6027\u548c\u53ef\u7528\u6027\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.3 MapReduce\u4f18\u5316<\/h3>\n<p>\u6838\u5fc3\u4f18\u5316\u65b9\u5411&#xff1a;\u51cf\u5c11Shuffle\u9636\u6bb5\u7684\u6570\u636e\u4f20\u8f93\u548c\u78c1\u76d8IO&#xff0c;\u63d0\u9ad8\u5e76\u884c\u5ea6&#xff0c;\u4f18\u5316\u8d44\u6e90\u5206\u914d&#xff1a;<\/p>\n<ul>\n<li>\n<p>Map\u7aef\u4f18\u5316&#xff1a;\u589e\u5927Map\u4efb\u52a1\u7684\u8f93\u5165\u5757\u5927\u5c0f\u3001\u542f\u7528Combine&#xff08;\u5728Map\u7aef\u63d0\u524d\u5408\u5e76\u76f8\u540cKey\u7684Value&#xff0c;\u51cf\u5c11Shuffle\u6570\u636e\u91cf&#xff09;\u3001\u4f18\u5316Map\u4efb\u52a1\u6570\u91cf&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Reduce\u7aef\u4f18\u5316&#xff1a;\u4f18\u5316Reduce\u4efb\u52a1\u6570\u91cf\u3001\u542f\u7528\u6570\u636e\u538b\u7f29&#xff08;Shuffle\u9636\u6bb5\u548c\u8f93\u51fa\u7ed3\u679c\u538b\u7f29&#xff0c;\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u91cf&#xff09;\u3001\u8c03\u6574Reduce\u4efb\u52a1\u7684\u5e76\u884c\u5ea6&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u8d44\u6e90\u4f18\u5316&#xff1a;\u5728yarn-site.xml\u4e2d\u8c03\u6574Container\u7684CPU\u3001\u5185\u5b58\u5206\u914d&#xff0c;\u5339\u914d\u96c6\u7fa4\u786c\u4ef6\u914d\u7f6e\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u516d\u3001\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/h2>\n<h3>6.1 HDFS\u76f8\u5173\u95ee\u9898<\/h3>\n<ul>\n<li>\n<p>\u95ee\u98981&#xff1a;DataNode\u542f\u52a8\u5931\u8d25&#xff0c;\u65e5\u5fd7\u63d0\u793a\u201cIncompatible clusterIDs\u201d&#xff1b;<\/p>\n<p>    \u89e3\u51b3\u65b9\u6848&#xff1a;\u5220\u9664DataNode\u7684\u6570\u636e\u5b58\u50a8\u76ee\u5f55&#xff08;\u914d\u7f6e\u6587\u4ef6\u4e2d\u6307\u5b9a\u7684dfs.datanode.data.dir&#xff09;&#xff0c;\u91cd\u65b0\u542f\u52a8DataNode&#xff08;\u4f1a\u81ea\u52a8\u540c\u6b65NameNode\u7684clusterID&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u95ee\u98982&#xff1a;HDFS\u4e0a\u4f20\u6587\u4ef6\u5931\u8d25&#xff0c;\u63d0\u793a\u201cName node is in safe mode\u201d&#xff1b;<\/p>\n<p>    \u89e3\u51b3\u65b9\u6848&#xff1a;NameNode\u5904\u4e8e\u5b89\u5168\u6a21\u5f0f&#xff08;\u96c6\u7fa4\u542f\u52a8\u521d\u671f\u6216\u6545\u969c\u540e\u81ea\u52a8\u8fdb\u5165&#xff09;&#xff0c;\u7b49\u5f85\u5b89\u5168\u6a21\u5f0f\u9000\u51fa&#xff0c;\u6216\u624b\u52a8\u9000\u51fa&#xff1a;hdfs dfsadmin -safemode leave\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>6.2 MapReduce\u76f8\u5173\u95ee\u9898<\/h3>\n<ul>\n<li>\n<p>\u95ee\u98981&#xff1a;MapReduce\u4efb\u52a1\u6267\u884c\u7f13\u6162&#xff0c;\u5361\u5728Shuffle\u9636\u6bb5&#xff1b;<\/p>\n<p>    \u89e3\u51b3\u65b9\u6848&#xff1a;\u542f\u7528\u6570\u636e\u538b\u7f29\u3001\u8c03\u6574Map\/Reduce\u4efb\u52a1\u6570\u91cf\u3001\u4f18\u5316Combine\u64cd\u4f5c&#xff0c;\u51cf\u5c11Shuffle\u9636\u6bb5\u7684\u6570\u636e\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p>\u95ee\u98982&#xff1a;Reduce\u4efb\u52a1\u6267\u884c\u5931\u8d25&#xff0c;\u63d0\u793a\u201cOut of memory\u201d&#xff1b;<\/p>\n<p>    \u89e3\u51b3\u65b9\u6848&#xff1a;\u589e\u5927Reduce\u4efb\u52a1\u5bf9\u5e94\u7684Container\u5185\u5b58&#xff08;\u5728mapred-site.xml\u4e2d\u914d\u7f6e&#xff09;&#xff0c;\u6216\u62c6\u5206Reduce\u4efb\u52a1&#xff0c;\u51cf\u5c11\u5355\u4e2aReduce\u4efb\u52a1\u5904\u7406\u7684\u6570\u636e\u91cf\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>6.3 YARN\u76f8\u5173\u95ee\u9898<\/h3>\n<ul>\n<li>\n<p>\u95ee\u98981&#xff1a;NodeManager\u542f\u52a8\u5931\u8d25&#xff0c;\u65e5\u5fd7\u63d0\u793a\u201cPort already in use\u201d&#xff1b;<\/p>\n<p>    \u89e3\u51b3\u65b9\u6848&#xff1a;\u67e5\u770b\u7aef\u53e3\u5360\u7528\u60c5\u51b5&#xff08;netstat -tunlp | grep \u7aef\u53e3\u53f7&#xff09;&#xff0c;\u6740\u6b7b\u5360\u7528\u7aef\u53e3\u7684\u8fdb\u7a0b&#xff0c;\u6216\u4fee\u6539yarn-site.xml\u4e2d\u7684\u7aef\u53e3\u914d\u7f6e\u3002<\/p>\n<\/li>\n<li>\n<p>\u95ee\u98982&#xff1a;\u4efb\u52a1\u63d0\u4ea4\u540e&#xff0c;\u4e00\u76f4\u5904\u4e8e\u201cAccepted\u201d\u72b6\u6001&#xff0c;\u65e0\u6cd5\u8fdb\u5165\u201cRunning\u201d\u72b6\u6001&#xff1b;<\/p>\n<p>    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\u8fdb\u9636\u65b9\u5411<\/h3>\n<li>\n<p>Hadoop\u751f\u6001\u5de5\u5177&#xff1a;\u6df1\u5165\u5b66\u4e60Hive\u3001HBase\u3001Spark\u3001ZooKeeper\u7684\u4f7f\u7528\u548c\u539f\u7406&#xff0c;\u638c\u63e1\u5927\u6570\u636e\u5904\u7406\u7684\u5b8c\u6574\u6d41\u7a0b&#xff1b;<\/p>\n<\/li>\n<li>\n<p>Hadoop\u6e90\u7801&#xff1a;\u9605\u8bfbHDFS\u548cMapReduce\u7684\u6838\u5fc3\u6e90\u7801&#xff0c;\u7406\u89e3\u5e95\u5c42\u5b9e\u73b0\u673a\u5236&#xff08;\u5982NameNode\u5143\u6570\u636e\u7ba1\u7406\u3001Shuffle\u6d41\u7a0b&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u751f\u4ea7\u73af\u5883\u90e8\u7f72\u4e0e\u8c03\u4f18&#xff1a;\u5b66\u4e60Hadoop\u96c6\u7fa4\u7684\u89c4\u6a21\u5316\u90e8\u7f72\u3001HA\/Federation\u914d\u7f6e\u3001\u6027\u80fd\u8c03\u4f18&#xff0c;\u9002\u5e94\u751f\u4ea7\u73af\u5883\u9700\u6c42&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5b9e\u65f6\u8ba1\u7b97\u6846\u67b6&#xff1a;\u5b66\u4e60Spark 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\/>\n\u6838\u5fc3\u4f18\u52bf&#xff1a;\u9ad8\u53ef\u9760\u6027&#xff08;\u591a\u526f\u672c\u5b58\u50a8&amp;#<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[779,664,323],"topic":[],"class_list":["post-78565","post","type-post","status-publish","format-standard","hentry","category-server","tag-hadoop","tag-664","tag-323"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hadoop\u6838\u5fc3\u6280\u672f\u4e0e\u5b9e\u6218\u6307\u5357 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/78565.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta 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