{"id":1117,"date":"2012-05-12T22:11:57","date_gmt":"2012-05-12T14:11:57","guid":{"rendered":"http:\/\/www.strongd.net\/?p=1117"},"modified":"2012-05-12T22:11:57","modified_gmt":"2012-05-12T14:11:57","slug":"%e5%9b%9b%e5%a4%a7%e5%b9%b6%e8%a1%8c%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f%e5%af%b9%e6%af%94%ef%bc%88hdfskfscephpanasas","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=1117","title":{"rendered":"\u56db\u5927\u5e76\u884c\u6587\u4ef6\u7cfb\u7edf\u5bf9\u6bd4\uff08HDFS,KFS,CEPH,PANASAS)"},"content":{"rendered":"<p><span style=\"font-size: small;\"><strong>\u4ec0\u4e48\u662f<\/strong><strong>Hadoop<\/strong><strong>\uff1f<\/strong><\/span><\/p>\n<p><a href=\"http:\/\/hadoop.apache.org\/\" target=\"_blank\"><span style=\"color: #003399;\">Hadoop<\/span><\/a>\u662fapache\u4e0b\u9762\u7684\u4e00\u4e2a\u5206\u5e03\u5f0f\u5e76\u884c\u8ba1\u7b97\u6846\u67b6\uff0c\u662f\u4ecelunece\u4e2d\u62bd\u53d6\u51fa\u6765\u7684\u4e00\u4e2a\u6846\u67b6\u3002Hadoop\u7684\u6838\u5fc3\u8bbe\u8ba1\u601d\u60f3\u662f\uff1aMapReduce\u548cHDFS\uff0cMapReduce\u662fGoogle\u63d0\u51fa\u7684\u4e00\u4e2a\u8f6f\u4ef6\u67b6\u6784\uff0c\u7528\u4e8e\u5927\u89c4\u6a21\u6570\u636e\u96c6\uff08\u5927\u4e8e1TB\uff09\u7684\u5e76\u884c\u8fd0\u7b97\u3002\u6982\u5ff5&#8221;Map\uff08\u6620\u5c04\uff09&#8221;\u548c&#8221;Reduce\uff08\u5316\u7b80\uff09&#8221;\uff0c\u548c\u4ed6\u4eec\u7684\u4e3b\u8981\u601d\u60f3\uff0c\u90fd\u662f\u4ece\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u8a00\u501f\u6765\u7684\uff0c\u8fd8\u6709\u4ece\u77e2\u91cf\u7f16\u7a0b\u8bed\u8a00\u501f\u6765\u7684\u7279\u6027\uff1bHDFS\u662fHadoop Distributed File System\u7684\u7f29\u5199\uff0c\u5373\uff1aHadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff0c\u4e3a\u5206\u5e03\u5f0f\u8ba1\u7b97\u5b58\u50a8\u63d0\u4f9b\u5e95\u5c42\u652f\u6301\u3002\u6ce8\uff1aMapReduce (google mapreduce\u00a0\u8bba\u6587\u70b9\u51fb<a href=\"http:\/\/labs.google.com\/papers\/mapreduce.html\" target=\"_blank\"><span style=\"color: #003399;\">\u8fd9\u91cc<\/span><\/a>)\uff0cGFS\uff08Google File System\uff09\u548cbigtable\u662fgoogle\u7684\u4e09\u5927\u6838\u5fc3\u6280\u672f\u3002<\/p>\n<p><span style=\"font-size: small;\"><strong>HadoopMapReduce<\/strong><strong>\u4ecb\u7ecd<\/strong><\/span><\/p>\n<p>Map(\u6620\u5c04)\u548creduce(\u5316\u7b80)\u662f\u5206\u5f00\u5904\u7406\u7684\uff0cmap\u662f\u5c06\u4e00\u4e2a\u4efb\u52a1\u5206\u89e3\u4e3a\u591a\u4e2a\u4efb\u52a1\u6267\u884c\uff0creduce\u662f\u5c06\u591a\u4e2a\u4efb\u52a1\u6c47\u603b\u8d77\u6765\u5f97\u5230\u60f3\u8981\u7684\u7ed3\u679c\u3002\u628a\u4e00\u4e2alist\u62c6\u89e3\u4e3a\u591a\u4e2a\u653e\u5230\u7ebf\u7a0b\u6c60\u4e2d\u542f\u52a8\u591a\u4e2a\u7ebf\u7a0b\u8ba1\u7b97list\u4e2d\u503c\uff0c\u7136\u540e\u628a\u591a\u4e2a\u4efb\u52a1\u8fd4\u56de\u7684\u7ed3\u679c\u5408\u5e76\u4e3a\u4e00\u4e2a\u603b\u7684\u7ed3\u679c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684MapReduce\u7684\u5e94\u7528\u3002<\/p>\n<p>\u5728Hadoop\u5b98\u65b9\u6587\u6863\uff08\u5355\u51fb<a href=\"http:\/\/wiki.apache.org\/hadoop\/HadoopMapReduce\" target=\"_blank\"><span style=\"color: #003399;\">\u8fd9\u91cc<\/span><\/a>\uff09\u4ecb\u7ecd\u4e86HadoopMapReduce\u7684\u4e09\u4e2a\u6b65\u9aa4\uff0cmap\uff08\u4e3b\u8981\u662f\u5206\u89e3\u5e76\u884c\u7684\u4efb\u52a1\uff09\uff0ccombine\uff08\u4e3b\u8981\u662f\u4e3a\u4e86\u63d0\u9ad8reduce\u7684\u6548\u7387\uff09\uff0creduce\uff08\u628a\u5904\u7406\u540e\u7684\u7ed3\u679c\u518d\u6c47\u603b\u8d77\u6765\uff09<\/p>\n<p align=\"left\"><strong>\u00a0<\/strong><\/p>\n<p align=\"left\"><strong>\u00a0<\/strong><\/p>\n<p align=\"left\"><strong>1<\/strong><strong>\u3001HDFS<\/strong><strong><br \/>\n<\/strong><br \/>\n\u5373Hadoop Distributed File System (Hadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf)<br \/>\nHDFS\u00a0\u5177\u6709\u9ad8\u5bb9\u9519\u6027\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u90e8\u7f72\u5728\u4f4e\u4ef7\u7684\u786c\u4ef6\u8bbe\u5907\u4e4b\u4e0a\u3002HDFS\u5f88\u9002\u5408\u90a3\u4e9b\u6709\u5927\u6570\u636e\u96c6\u7684\u5e94\u7528\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u5bf9\u6570\u636e\u8bfb\u5199\u7684\u9ad8\u541e\u5410\u7387\u3002HDFS\u662f\u4e00\u4e2a\u00a0master\/slave\u7684\u7ed3\u6784\uff0c\u5c31\u901a\u5e38\u7684\u90e8\u7f72\u6765\u8bf4\uff0c\u5728master\u4e0a\u53ea\u8fd0\u884c\u4e00\u4e2aNamenode\uff0c\u800c\u5728\u6bcf\u4e00\u4e2aslave\u4e0a\u8fd0\u884c\u4e00\u4e2aDatanode\u3002<br \/>\nHDFS\u00a0\u652f\u6301\u4f20\u7edf\u7684\u5c42\u6b21\u6587\u4ef6\u7ec4\u7ec7\u7ed3\u6784\uff0c\u540c\u73b0\u6709\u7684\u4e00\u4e9b\u6587\u4ef6\u7cfb\u7edf\u5728\u64cd\u4f5c\u4e0a\u5f88\u7c7b\u4f3c\uff0c\u6bd4\u5982\u4f60\u53ef\u4ee5\u521b\u5efa\u548c\u5220\u9664\u4e00\u4e2a\u6587\u4ef6\uff0c\u628a\u4e00\u4e2a\u6587\u4ef6\u4ece\u4e00\u4e2a\u76ee\u5f55\u79fb\u5230\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u91cd\u547d\u540d\u7b49\u7b49\u64cd\u4f5c\u3002Namenode\u7ba1\u7406\u7740\u6574\u4e2a\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff0c\u5bf9\u6587\u4ef6\u7cfb\u7edf\u7684\u64cd\u4f5c\uff08\u5982\u5efa\u7acb\u3001\u5220\u9664\u6587\u4ef6\u548c\u6587\u4ef6\u5939\uff09\u90fd\u662f\u901a\u8fc7Namenode\u6765\u63a7\u5236\u3002<br \/>\n\u4e0b\u9762\u662fHDFS\u7684\u7ed3\u6784\uff1a<\/p>\n<p align=\"center\">\n<p>\u4ece\u4e0a\u9762\u7684\u56fe\u4e2d\u53ef\u4ee5\u770b \u51fa\uff0cNamenode\uff0cDatanode\uff0cClient\u4e4b\u95f4\u7684\u901a\u4fe1\u90fd\u662f\u5efa\u7acb\u5728TCP\/IP\u7684\u57fa\u7840\u4e4b\u4e0a\u7684\u3002\u5f53Client\u8981\u6267\u884c\u4e00\u4e2a\u5199\u5165\u7684\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u547d\u4ee4 \u4e0d\u662f\u9a6c\u4e0a\u5c31\u53d1\u9001\u5230Namenode\uff0cClient\u9996\u5148\u5728\u672c\u673a\u4e0a\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d\u7f13\u5b58\u8fd9\u4e9b\u6570\u636e\uff0c\u5f53\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d\u7684\u6570\u636e\u5757\u8fbe\u5230\u4e86\u8bbe\u5b9a\u7684Block\u7684\u503c\uff08\u9ed8\u8ba4\u662f\u00a064M\uff09\u65f6\uff0cClient\u4fbf\u4f1a\u901a\u77e5Namenode\uff0cNamenode\u4fbf\u54cd\u5e94Client\u7684RPC\u8bf7\u6c42\uff0c\u5c06\u6587\u4ef6\u540d\u63d2\u5165\u6587\u4ef6\u7cfb\u7edf\u5c42\u6b21\u4e2d\u5e76\u4e14\u5728\u00a0Datanode\u4e2d\u627e\u5230\u4e00\u5757\u5b58\u653e\u8be5\u6570\u636e\u7684block\uff0c\u540c\u65f6\u5c06\u8be5Datanode\u53ca\u5bf9\u5e94\u7684\u6570\u636e\u5757\u4fe1\u606f\u544a\u8bc9Client\uff0cClient\u4fbf\u8fd9\u4e9b\u672c\u5730\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d \u7684\u6570\u636e\u5757\u5199\u5165\u6307\u5b9a\u7684\u6570\u636e\u8282\u70b9\u3002<br \/>\nHDFS\u91c7\u53d6\u4e86\u526f\u672c\u7b56\u7565\uff0c\u5176\u76ee\u7684\u662f\u4e3a\u4e86\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\uff0c\u53ef\u7528\u6027\u3002HDFS\u7684\u526f\u672c\u653e\u7f6e\u7b56\u7565\u662f\u4e09\u4e2a\u526f\u672c\uff0c \u4e00\u4e2a\u653e\u5728\u672c\u8282\u70b9\u4e0a\uff0c\u4e00\u4e2a\u653e\u5728\u540c\u4e00\u673a\u67b6\u4e2d\u7684\u53e6\u4e00\u4e2a\u8282\u70b9\u4e0a\uff0c\u8fd8\u6709\u4e00\u4e2a\u526f\u672c\u653e\u5728\u53e6\u4e00\u4e2a\u4e0d\u540c\u7684\u673a\u67b6\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\u4e0a\u3002\u5f53\u524d\u7248\u672c\u7684hadoop0.12.0\u4e2d\u8fd8\u6ca1\u6709\u5b9e \u73b0\uff0c\u4f46\u662f\u6b63\u5728\u8fdb\u884c\u4e2d\uff0c\u76f8\u4fe1\u4e0d\u4e45\u5c31\u53ef\u4ee5\u51fa\u6765\u4e86\u3002<\/p>\n<p><span style=\"font-size: small;\"><span style=\"font-family: Calibri;\">KFS<\/span>\uff08<span style=\"font-family: Calibri;\">KOSMOS DISTRIBUTED FILE SYSTEM<\/span>\uff09\uff0c\u4e00\u4e2a\u7c7b\u4f3c<span style=\"font-family: Calibri;\">GFS<\/span>\u3001<span style=\"font-family: Calibri;\">Hadoop<\/span>\u4e2d<span style=\"font-family: Calibri;\">HDFS\u00a0<\/span>\u7684\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u3002<\/span><\/p>\n<p><span style=\"font-family: Calibri; font-size: small;\">\u00a0<\/span><\/p>\n<p><span style=\"font-size: small;\"><span style=\"font-family: Calibri;\">PS: google<\/span>\u7684\u4e09\u5927\u57fa\u77f3<span style=\"font-family: Calibri;\">\u00a0gfs,bigtable,map-reduce\u00a0<\/span>\u76f8\u5bf9\u5e94\u7684\u5f00\u6e90\u4ea7\u54c1<span style=\"font-family: Calibri;\">\u00a0gfs:kfs(<\/span>\u636e\u4f20<span style=\"font-family: Calibri;\">google<\/span>\u521b\u53f2\u4eba\u7684\u540c\u7a97\u6240\u521b<span style=\"font-family: Calibri;\">)<\/span>\uff0c<span style=\"font-family: Calibri;\">hdfs(hadoop<\/span>\u7684\u5b50\u9879\u76ee<span style=\"font-family: Calibri;\">) bigtable:hbase(hadoop<\/span>\u7684\u5b50\u9879\u76ee<span style=\"font-family: Calibri;\">)<\/span>\uff0c<span style=\"font-family: Calibri;\">Hypertable<\/span>\uff08\u4ece<span style=\"font-family: Calibri;\">hbase<\/span>\u9879\u76ee\u7ec4\u5206\u79bb\u51fa\u53bb\u7684\uff0c\u7528<span style=\"font-family: Calibri;\">c++<\/span>\u5b9e\u73b0\uff09<span style=\"font-family: Calibri;\">\u00a0map-reduce:hadoop<\/span>\uff08<span style=\"font-family: Calibri;\">apache<\/span>\u7684\u9879\u76ee\uff0c<span style=\"font-family: Calibri;\">java<\/span>\u5b9e\u73b0\uff0c\u76ee\u524d\u521b\u53f2\u4eba\u5728<span style=\"font-family: Calibri;\">yahoo<\/span>\u5168\u529b\u6253\u9020\uff0c\u5df2\u6709<span style=\"font-family: Calibri;\">2000<\/span>\u4e2a\u4ee5\u4e0a\u7684\u8282\u70b9\u5e76\u884c\u8ba1\u7b97\u7684\u89c4\u6a21\uff09<\/span><\/p>\n<p><span style=\"font-family: Calibri; font-size: small;\">\u00a0<\/span><\/p>\n<p><span style=\"font-family: Calibri; font-size: small;\">\u00a0<\/span><\/p>\n<p><span style=\"font-size: small;\"><span style=\"font-family: Calibri;\">Google<\/span>\u4e24\u4e2a\u5171\u540c\u521b\u59cb\u4eba\u7684\u4e24\u4e2a\u5927\u5b66\u540c\u7a97\uff08\u5370\u5ea6\u4eba\uff09<span style=\"font-family: Calibri;\">Anand Rajaraman<\/span>\u548c<span style=\"font-family: Calibri;\">Venky Harinarayan<\/span>\uff0c\u521b\u7acb\u7684\u4e00\u4e2a\u65b0\u7684\u641c\u7d22\u5f15\u64ce<span style=\"font-family: Calibri;\">Kosmix<\/span>\u6700\u8fd1\u6350\u732e\u4e86\u4e00\u4e2a\u514b\u9686<span style=\"font-family: Calibri;\">GFS<\/span>\u7684\u6587\u4ef6\u7cfb\u7edf<span style=\"font-family: Calibri;\">KFS<\/span>\u9879\u76ee\u3002<span style=\"font-family: Calibri;\">Hadoop<\/span>\u548c<span style=\"font-family: Calibri;\">Hypertable<\/span>\u8fd9\u4e24\u4e2a\u9879\u76ee\u4e5f\u5f00\u59cb\u652f\u6301<span style=\"font-family: Calibri;\">KFS<\/span>\u6765\u505a\u5e95\u5c42\u7684\u5b58\u50a8\u3002<span style=\"font-family: Calibri;\">KFS<\/span>\u662f\u7528<span style=\"font-family: Calibri;\">C++<\/span>\u5199\u7684\uff0c\u4f46\u662f\u5176<span style=\"font-family: Calibri;\">client<\/span>\u652f\u6301<span style=\"font-family: Calibri;\">C++<\/span>\uff0c<span style=\"font-family: Calibri;\">Java<\/span>\u548c<span style=\"font-family: Calibri;\">Python<\/span>\u3002\u90a3\u4e48<span style=\"font-family: Calibri;\">KFS<\/span>\u5230\u5e95\u6709\u4ec0\u4e48\u7279\u6027\u5462\uff1f<\/span><\/p>\n<p><span style=\"font-family: Calibri; font-size: small;\">\u00a0<\/span><\/p>\n<p><span style=\"font-size: small;\">\u652f\u6301\u5b58\u50a8\u6269\u5145\uff08\u6dfb\u52a0\u65b0\u7684<span style=\"font-family: Calibri;\">chunckserver,<\/span>\u7cfb\u7edf\u81ea\u52a8\u611f\u77e5\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\">\u6709\u6548\u6027\uff08\u590d\u5236\u673a\u5236\u4fdd\u8bc1\u6587\u4ef6\u6709\u6548\u6027\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\">\u8d1f\u8f7d\u5e73\u8861\uff08\u7cfb\u7edf\u5468\u671f\u5730\u68c0\u67e5<span style=\"font-family: Calibri;\">chunkservers<\/span>\u7684\u78c1\u76d8\u5229\u7528\uff0c\u5e76\u91cd\u65b0\u5e73\u8861<span style=\"font-family: Calibri;\">chunkservers<\/span>\u7684\u78c1\u76d8\u5229\u7528\uff0c<span style=\"font-family: Calibri;\">HDFS<\/span>\u73b0\u5728\u8fd8\u6ca1\u6709\u652f\u6301\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\">\u6570\u636e\u5b8c\u6574\u6027\uff08\u5f53\u8981\u8bfb\u53d6\u6570\u636e\u65f6\u68c0\u67e5\u6570\u636e\u7684\u5b8c\u6574\u6027\uff0c\u5982\u679c\u68c0\u9a8c\u51fa\u9519\u4f7f\u7528\u53e6\u5916\u7684\u5907\u4efd\u8986\u76d6\u5f53\u524d\u7684\u6570\u636e\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\">\u652f\u6301<span style=\"font-family: Calibri;\">FUSE<\/span>\uff08<span style=\"font-family: Calibri;\">HDFS<\/span>\u4e5f\u6709\u5de5\u5177\u652f\u6301<span style=\"font-family: Calibri;\">FUSE<\/span>\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\">\u4f7f\u7528\u5951\u7ea6\uff08\u4fdd\u8bc1<span style=\"font-family: Calibri;\">Client<\/span>\u7f13\u5b58\u7684\u6570\u636e\u548c\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u4fdd\u6301\u4e00\u81f4\u6027\uff09<\/span><\/p>\n<p><span style=\"font-size: small;\"><span style=\"font-family: Calibri;\">HDFS<\/span>\u672a\u652f\u6301\u7684\u9ad8\u7ea7\u7279\u6027\uff1a<\/span><\/p>\n<p><span style=\"font-family: Calibri; font-size: small;\">\u00a0<\/span><\/p>\n<p><span style=\"font-size: small;\">\u652f\u6301\u540c\u4e00\u6587\u4ef6\u591a\u6b21\u5199\u5165\u548c<span style=\"font-family: Calibri;\">Append<\/span>\uff0c\u4e0d\u50cf<span style=\"font-family: Calibri;\">HDFS<\/span>\u652f\u6301\u4e00\u6b21\u5199\u5165\u591a\u6b21\u8bfb\u53d6\u548c\u4e0d\u652f\u6301<span style=\"font-family: Calibri;\">Append<\/span>\uff08\u6700\u8fd1\u8981\u589e\u52a0<span style=\"font-family: Calibri;\">Append<\/span>\uff0c\u4f46\u662f\u9047\u5230\u8bb8\u591a\u95ee\u9898\uff09\u3002<\/span><\/p>\n<p><span style=\"font-size: small;\">\u6587\u4ef6\u53ca\u65f6\u6709\u6548\uff0c\u5f53\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u65f6<span style=\"font-family: Calibri;\">,<\/span>\u6587\u4ef6\u540d\u5728\u7cfb\u7edf\u9a6c\u4e0a\u6709\u6548\u3002\u4e0d\u50cf<span style=\"font-family: Calibri;\">HDFS<\/span>\u6587\u4ef6\u53ea\u5f53\u8f93\u5165\u6d41\u5173\u95ed\u65f6\u624d\u5728\u7cfb\u7edf\u4e2d\u6709\u6548\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u5728\u5173\u95ed\u524d\u51fa\u73b0\u5f02\u5e38\u5bfc\u81f4\u6ca1\u6709\u5173\u95ed\u8f93\u5165\u6d41\uff0c\u6570\u636e\u5c06\u4f1a\u4e22\u5931\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662fHadoop\uff1f Hadoop\u662fapache\u4e0b\u9762\u7684\u4e00\u4e2a\u5206\u5e03\u5f0f\u5e76\u884c\u8ba1\u7b97\u6846\u67b6\uff0c\u662f\u4ecelunece\u4e2d\u62bd\u53d6\u51fa\u6765\u7684\u4e00\u4e2a\u6846\u67b6\u3002Hadoop\u7684\u6838\u5fc3\u8bbe\u8ba1\u601d\u60f3\u662f\uff1aMapReduce\u548cHDFS\uff0cMapReduce\u662fGoogle\u63d0\u51fa\u7684\u4e00\u4e2a\u8f6f\u4ef6\u67b6\u6784\uff0c\u7528\u4e8e\u5927\u89c4\u6a21\u6570\u636e\u96c6\uff08\u5927\u4e8e1TB\uff09\u7684\u5e76\u884c\u8fd0\u7b97\u3002\u6982\u5ff5&#8221;Map\uff08\u6620\u5c04\uff09&#8221;\u548c&#8221;Reduce\uff08\u5316\u7b80\uff09&#8221;\uff0c\u548c\u4ed6\u4eec\u7684\u4e3b\u8981\u601d\u60f3\uff0c\u90fd\u662f\u4ece\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u8a00\u501f\u6765\u7684\uff0c\u8fd8\u6709\u4ece\u77e2\u91cf\u7f16\u7a0b\u8bed\u8a00\u501f\u6765\u7684\u7279\u6027\uff1bHDFS\u662fHadoop Distributed File System\u7684\u7f29\u5199\uff0c\u5373\uff1aHadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff0c\u4e3a\u5206\u5e03\u5f0f\u8ba1\u7b97\u5b58\u50a8\u63d0\u4f9b\u5e95\u5c42\u652f\u6301\u3002\u6ce8\uff1aMapReduce (google mapreduce\u00a0\u8bba\u6587\u70b9\u51fb\u8fd9\u91cc)\uff0cGFS\uff08Google File System\uff09\u548cbigtable\u662fgoogle\u7684\u4e09\u5927\u6838\u5fc3\u6280\u672f\u3002 HadoopMapReduce\u4ecb\u7ecd Map(\u6620\u5c04)\u548creduce(\u5316\u7b80)\u662f\u5206\u5f00\u5904\u7406\u7684\uff0cmap\u662f\u5c06\u4e00\u4e2a\u4efb\u52a1\u5206\u89e3\u4e3a\u591a\u4e2a\u4efb\u52a1\u6267\u884c\uff0creduce\u662f\u5c06\u591a\u4e2a\u4efb\u52a1\u6c47\u603b\u8d77\u6765\u5f97\u5230\u60f3\u8981\u7684\u7ed3\u679c\u3002\u628a\u4e00\u4e2alist\u62c6\u89e3\u4e3a\u591a\u4e2a\u653e\u5230\u7ebf\u7a0b\u6c60\u4e2d\u542f\u52a8\u591a\u4e2a\u7ebf\u7a0b\u8ba1\u7b97list\u4e2d\u503c\uff0c\u7136\u540e\u628a\u591a\u4e2a\u4efb\u52a1\u8fd4\u56de\u7684\u7ed3\u679c\u5408\u5e76\u4e3a\u4e00\u4e2a\u603b\u7684\u7ed3\u679c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684MapReduce\u7684\u5e94\u7528\u3002 \u5728Hadoop\u5b98\u65b9\u6587\u6863\uff08\u5355\u51fb\u8fd9\u91cc\uff09\u4ecb\u7ecd\u4e86HadoopMapReduce\u7684\u4e09\u4e2a\u6b65\u9aa4\uff0cmap\uff08\u4e3b\u8981\u662f\u5206\u89e3\u5e76\u884c\u7684\u4efb\u52a1\uff09\uff0ccombine\uff08\u4e3b\u8981\u662f\u4e3a\u4e86\u63d0\u9ad8reduce\u7684\u6548\u7387\uff09\uff0creduce\uff08\u628a\u5904\u7406\u540e\u7684\u7ed3\u679c\u518d\u6c47\u603b\u8d77\u6765\uff09 \u00a0 \u00a0 1\u3001HDFS \u5373Hadoop Distributed File System (Hadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf) HDFS\u00a0\u5177\u6709\u9ad8\u5bb9\u9519\u6027\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u90e8\u7f72\u5728\u4f4e\u4ef7\u7684\u786c\u4ef6\u8bbe\u5907\u4e4b\u4e0a\u3002HDFS\u5f88\u9002\u5408\u90a3\u4e9b\u6709\u5927\u6570\u636e\u96c6\u7684\u5e94\u7528\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u5bf9\u6570\u636e\u8bfb\u5199\u7684\u9ad8\u541e\u5410\u7387\u3002HDFS\u662f\u4e00\u4e2a\u00a0master\/slave\u7684\u7ed3\u6784\uff0c\u5c31\u901a\u5e38\u7684\u90e8\u7f72\u6765\u8bf4\uff0c\u5728master\u4e0a\u53ea\u8fd0\u884c\u4e00\u4e2aNamenode\uff0c\u800c\u5728\u6bcf\u4e00\u4e2aslave\u4e0a\u8fd0\u884c\u4e00\u4e2aDatanode\u3002 HDFS\u00a0\u652f\u6301\u4f20\u7edf\u7684\u5c42\u6b21\u6587\u4ef6\u7ec4\u7ec7\u7ed3\u6784\uff0c\u540c\u73b0\u6709\u7684\u4e00\u4e9b\u6587\u4ef6\u7cfb\u7edf\u5728\u64cd\u4f5c\u4e0a\u5f88\u7c7b\u4f3c\uff0c\u6bd4\u5982\u4f60\u53ef\u4ee5\u521b\u5efa\u548c\u5220\u9664\u4e00\u4e2a\u6587\u4ef6\uff0c\u628a\u4e00\u4e2a\u6587\u4ef6\u4ece\u4e00\u4e2a\u76ee\u5f55\u79fb\u5230\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u91cd\u547d\u540d\u7b49\u7b49\u64cd\u4f5c\u3002Namenode\u7ba1\u7406\u7740\u6574\u4e2a\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff0c\u5bf9\u6587\u4ef6\u7cfb\u7edf\u7684\u64cd\u4f5c\uff08\u5982\u5efa\u7acb\u3001\u5220\u9664\u6587\u4ef6\u548c\u6587\u4ef6\u5939\uff09\u90fd\u662f\u901a\u8fc7Namenode\u6765\u63a7\u5236\u3002 \u4e0b\u9762\u662fHDFS\u7684\u7ed3\u6784\uff1a \u4ece\u4e0a\u9762\u7684\u56fe\u4e2d\u53ef\u4ee5\u770b \u51fa\uff0cNamenode\uff0cDatanode\uff0cClient\u4e4b\u95f4\u7684\u901a\u4fe1\u90fd\u662f\u5efa\u7acb\u5728TCP\/IP\u7684\u57fa\u7840\u4e4b\u4e0a\u7684\u3002\u5f53Client\u8981\u6267\u884c\u4e00\u4e2a\u5199\u5165\u7684\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u547d\u4ee4 \u4e0d\u662f\u9a6c\u4e0a\u5c31\u53d1\u9001\u5230Namenode\uff0cClient\u9996\u5148\u5728\u672c\u673a\u4e0a\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d\u7f13\u5b58\u8fd9\u4e9b\u6570\u636e\uff0c\u5f53\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d\u7684\u6570\u636e\u5757\u8fbe\u5230\u4e86\u8bbe\u5b9a\u7684Block\u7684\u503c\uff08\u9ed8\u8ba4\u662f\u00a064M\uff09\u65f6\uff0cClient\u4fbf\u4f1a\u901a\u77e5Namenode\uff0cNamenode\u4fbf\u54cd\u5e94Client\u7684RPC\u8bf7\u6c42\uff0c\u5c06\u6587\u4ef6\u540d\u63d2\u5165\u6587\u4ef6\u7cfb\u7edf\u5c42\u6b21\u4e2d\u5e76\u4e14\u5728\u00a0Datanode\u4e2d\u627e\u5230\u4e00\u5757\u5b58\u653e\u8be5\u6570\u636e\u7684block\uff0c\u540c\u65f6\u5c06\u8be5Datanode\u53ca\u5bf9\u5e94\u7684\u6570\u636e\u5757\u4fe1\u606f\u544a\u8bc9Client\uff0cClient\u4fbf\u8fd9\u4e9b\u672c\u5730\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d \u7684\u6570\u636e\u5757\u5199\u5165\u6307\u5b9a\u7684\u6570\u636e\u8282\u70b9\u3002 HDFS\u91c7\u53d6\u4e86\u526f\u672c\u7b56\u7565\uff0c\u5176\u76ee\u7684\u662f\u4e3a\u4e86\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\uff0c\u53ef\u7528\u6027\u3002HDFS\u7684\u526f\u672c\u653e\u7f6e\u7b56\u7565\u662f\u4e09\u4e2a\u526f\u672c\uff0c \u4e00\u4e2a\u653e\u5728\u672c\u8282\u70b9\u4e0a\uff0c\u4e00\u4e2a\u653e\u5728\u540c\u4e00\u673a\u67b6\u4e2d\u7684\u53e6\u4e00\u4e2a\u8282\u70b9\u4e0a\uff0c\u8fd8\u6709\u4e00\u4e2a\u526f\u672c\u653e\u5728\u53e6\u4e00\u4e2a\u4e0d\u540c\u7684\u673a\u67b6\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\u4e0a\u3002\u5f53\u524d\u7248\u672c\u7684hadoop0.12.0\u4e2d\u8fd8\u6ca1\u6709\u5b9e \u73b0\uff0c\u4f46\u662f\u6b63\u5728\u8fdb\u884c\u4e2d\uff0c\u76f8\u4fe1\u4e0d\u4e45\u5c31\u53ef\u4ee5\u51fa\u6765\u4e86\u3002 KFS\uff08KOSMOS DISTRIBUTED FILE SYSTEM\uff09\uff0c\u4e00\u4e2a\u7c7b\u4f3cGFS\u3001Hadoop\u4e2dHDFS\u00a0\u7684\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u3002 \u00a0 PS: google\u7684\u4e09\u5927\u57fa\u77f3\u00a0gfs,bigtable,map-reduce\u00a0\u76f8\u5bf9\u5e94\u7684\u5f00\u6e90\u4ea7\u54c1\u00a0gfs:kfs(\u636e\u4f20google\u521b\u53f2\u4eba\u7684\u540c\u7a97\u6240\u521b)\uff0chdfs(hadoop\u7684\u5b50\u9879\u76ee) bigtable:hbase(hadoop\u7684\u5b50\u9879\u76ee)\uff0cHypertable\uff08\u4ecehbase\u9879\u76ee\u7ec4\u5206\u79bb\u51fa\u53bb\u7684\uff0c\u7528c++\u5b9e\u73b0\uff09\u00a0map-reduce:hadoop\uff08apache\u7684\u9879\u76ee\uff0cjava\u5b9e\u73b0\uff0c\u76ee\u524d\u521b\u53f2\u4eba\u5728yahoo\u5168\u529b\u6253\u9020\uff0c\u5df2\u67092000\u4e2a\u4ee5\u4e0a\u7684\u8282\u70b9\u5e76\u884c\u8ba1\u7b97\u7684\u89c4\u6a21\uff09 \u00a0 \u00a0 Google\u4e24\u4e2a\u5171\u540c\u521b\u59cb\u4eba\u7684\u4e24\u4e2a\u5927\u5b66\u540c\u7a97\uff08\u5370\u5ea6\u4eba\uff09Anand Rajaraman\u548cVenky Harinarayan\uff0c\u521b\u7acb\u7684\u4e00\u4e2a\u65b0\u7684\u641c\u7d22\u5f15\u64ceKosmix\u6700\u8fd1\u6350\u732e\u4e86\u4e00\u4e2a\u514b\u9686GFS\u7684\u6587\u4ef6\u7cfb\u7edfKFS\u9879\u76ee\u3002Hadoop\u548cHypertable\u8fd9\u4e24\u4e2a\u9879\u76ee\u4e5f\u5f00\u59cb\u652f\u6301KFS\u6765\u505a\u5e95\u5c42\u7684\u5b58\u50a8\u3002KFS\u662f\u7528C++\u5199\u7684\uff0c\u4f46\u662f\u5176client\u652f\u6301C++\uff0cJava\u548cPython\u3002\u90a3\u4e48KFS\u5230\u5e95\u6709\u4ec0\u4e48\u7279\u6027\u5462\uff1f \u00a0 \u652f\u6301\u5b58\u50a8\u6269\u5145\uff08\u6dfb\u52a0\u65b0\u7684chunckserver,\u7cfb\u7edf\u81ea\u52a8\u611f\u77e5\uff09 \u6709\u6548\u6027\uff08\u590d\u5236\u673a\u5236\u4fdd\u8bc1\u6587\u4ef6\u6709\u6548\u6027\uff09 \u8d1f\u8f7d\u5e73\u8861\uff08\u7cfb\u7edf\u5468\u671f\u5730\u68c0\u67e5chunkservers\u7684\u78c1\u76d8\u5229\u7528\uff0c\u5e76\u91cd\u65b0\u5e73\u8861chunkservers\u7684\u78c1\u76d8\u5229\u7528\uff0cHDFS\u73b0\u5728\u8fd8\u6ca1\u6709\u652f\u6301\uff09 \u6570\u636e\u5b8c\u6574\u6027\uff08\u5f53\u8981\u8bfb\u53d6\u6570\u636e\u65f6\u68c0\u67e5\u6570\u636e\u7684\u5b8c\u6574\u6027\uff0c\u5982\u679c\u68c0\u9a8c\u51fa\u9519\u4f7f\u7528\u53e6\u5916\u7684\u5907\u4efd\u8986\u76d6\u5f53\u524d\u7684\u6570\u636e\uff09 \u652f\u6301FUSE\uff08HDFS\u4e5f\u6709\u5de5\u5177\u652f\u6301FUSE\uff09 \u4f7f\u7528\u5951\u7ea6\uff08\u4fdd\u8bc1Client\u7f13\u5b58\u7684\u6570\u636e\u548c\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u4fdd\u6301\u4e00\u81f4\u6027\uff09 HDFS\u672a\u652f\u6301\u7684\u9ad8\u7ea7\u7279\u6027\uff1a \u00a0 \u652f\u6301\u540c\u4e00\u6587\u4ef6\u591a\u6b21\u5199\u5165\u548cAppend\uff0c\u4e0d\u50cfHDFS\u652f\u6301\u4e00\u6b21\u5199\u5165\u591a\u6b21\u8bfb\u53d6\u548c\u4e0d\u652f\u6301Append\uff08\u6700\u8fd1\u8981\u589e\u52a0Append\uff0c\u4f46\u662f\u9047\u5230\u8bb8\u591a\u95ee\u9898\uff09\u3002 \u6587\u4ef6\u53ca\u65f6\u6709\u6548\uff0c\u5f53\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u65f6,\u6587\u4ef6\u540d\u5728\u7cfb\u7edf\u9a6c\u4e0a\u6709\u6548\u3002\u4e0d\u50cfHDFS\u6587\u4ef6\u53ea\u5f53\u8f93\u5165\u6d41\u5173\u95ed\u65f6\u624d\u5728\u7cfb\u7edf\u4e2d\u6709\u6548\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u5728\u5173\u95ed\u524d\u51fa\u73b0\u5f02\u5e38\u5bfc\u81f4\u6ca1\u6709\u5173\u95ed\u8f93\u5165\u6d41\uff0c\u6570\u636e\u5c06\u4f1a\u4e22\u5931\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1117","post","type-post","status-publish","format-standard","hentry","category-20"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1117"}],"version-history":[{"count":1,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1117\/revisions"}],"predecessor-version":[{"id":1118,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1117\/revisions\/1118"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}