{"id":649,"date":"2016-05-21T18:54:09","date_gmt":"2016-05-21T18:54:09","guid":{"rendered":"http:\/\/blogs.softwareclue.com\/?p=649"},"modified":"2016-05-21T18:54:09","modified_gmt":"2016-05-21T18:54:09","slug":"%e5%87%a0%e6%ac%be%e4%b8%bb%e6%b5%81-nosql-%e6%95%b0%e6%8d%ae%e5%ba%93%e7%9a%84%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"http:\/\/blog.softwareclues.com\/zh\/%e5%87%a0%e6%ac%be%e4%b8%bb%e6%b5%81-nosql-%e6%95%b0%e6%8d%ae%e5%ba%93%e7%9a%84%e5%af%b9%e6%af%94","title":{"rendered":"\u51e0\u6b3e\u4e3b\u6d41 NoSQL \u6570\u636e\u5e93\u7684\u5bf9\u6bd4"},"content":{"rendered":"<blockquote><p>\u6765\u6e90\uff1aVaJoy Larn<\/p>\n<p>\u94fe\u63a5\uff1ahttp:\/\/www.cnblogs.com\/vajoy\/p\/5471308.html<\/p><\/blockquote>\n<p>\u6700\u8fd1\u5c0f\u7ec4\u51c6\u5907\u542f\u52a8\u4e00\u4e2a node \u5f00\u6e90\u9879\u76ee\uff0c\u4ece\u524d\u7aef\u4eb2\u548c\u529b\u3001\u5927\u6570\u636e\u4e0b\u7684IO\u6027\u80fd\u3001\u53ef\u6269\u5c55\u6027\u51e0\u70b9\u5165\u624b\u6311\u9009\u4e86 NoSql \u6570\u636e\u5e93\uff0c\u4f46\u5177\u4f53\u4f7f\u7528\u54ea\u4e00\u6b3e\u4ea7\u54c1\u8fd8\u9700\u8981\u505a\u4e00\u6b21\u9009\u578b\u3002<\/p>\n<p>\u6211\u4eec\u6700\u7ec8\u628a\u9009\u9879\u8303\u56f4\u7f29\u7a84\u5728\u00a0HBase\u3001Redis\u3001MongoDB\u3001Couchbase\u3001LevelDB \u4e94\u6b3e\u8f83\u4e3b\u6d41\u7684\u6570\u636e\u5e93\u4ea7\u54c1\u4e2d\uff0c\u672c\u6587\u5c06\u4e3b\u8981\u5bf9\u5b83\u4eec\u8fdb\u884c\u5206\u6790\u5bf9\u6bd4\u3002<\/p>\n<p>\u9274\u4e8e\u7f3a\u4e4f\u9879\u76ee\u4e2d\u7684\u5b9e\u6218\u7ecf\u9a8c\u6c89\u6dc0\uff0c\u672c\u6587\u5185\u5bb9\u548c\u89c2\u70b9\u4e3b\u8981\u8fd8\u662f\u4ece\u5404\u5e73\u53f0\u8d44\u6599\u641c\u7f57\u6c47\u603b\uff0c\u4e5f\u4e0d\u4f1a\u6709\u592a\u591a\u6df1\u5165\u6216\u5e95\u5c42\u539f\u7406\u63a2\u8ba8\u3002<\/p>\n<p>\u672c\u6587\u6240\u5f15\u7528\u7684\u8d44\u6599\u6765\u6e90\u5c06\u793a\u4e8e\u672c\u6587\u5c3e\u90e8\u3002\u6240\u6c47\u603b\u7684\u5185\u5bb9\u4ec5\u4f9b\u53c2\u8003\uff0c\u82e5\u6709\u5f02\u8bae\u671b\u6307\u6b63\u3002<\/p>\n<p><strong>HBase<\/strong><\/p>\n<p>HBase \u662f Apache Hadoop \u4e2d\u7684\u4e00\u4e2a\u5b50\u9879\u76ee\uff0c\u5c5e\u4e8e bigtable \u7684\u5f00\u6e90\u7248\u672c\uff0c\u6240\u5b9e\u73b0\u7684\u8bed\u8a00\u4e3aJava\uff08\u6545\u4f9d\u8d56 Java SDK\uff09\u3002HBase \u4f9d\u6258\u4e8e Hadoop \u7684 HDFS\uff08\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff09\u4f5c\u4e3a\u6700\u57fa\u672c\u5b58\u50a8\u57fa\u7840\u5355\u5143\u3002<\/p>\n<p>HBase\u5728\u5217\u4e0a\u5b9e\u73b0\u4e86 BigTable \u8bba\u6587\u63d0\u5230\u7684\u538b\u7f29\u7b97\u6cd5\u3001\u5185\u5b58\u64cd\u4f5c\u548c\u5e03\u9686\u8fc7\u6ee4\u5668\u3002HBase\u7684\u8868\u80fd\u591f\u4f5c\u4e3a\u00a0MapReduce\u4efb\u52a1\u7684\u8f93\u5165\u548c\u8f93\u51fa\uff0c\u53ef\u4ee5\u901a\u8fc7Java API\u6765\u8bbf\u95ee\u6570\u636e\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7REST\u3001Avro\u6216\u8005Thrift\u7684API\u6765\u8bbf\u95ee\u3002<br \/>\n<strong>1. \u7279\u70b9<\/strong><\/p>\n<p>1.1 \u6570\u636e\u683c\u5f0f<\/p>\n<p>HBash \u7684\u6570\u636e\u5b58\u50a8\u662f\u57fa\u4e8e\u5217\uff08ColumnFamily\uff09\u7684\uff0c\u4e14\u975e\u5e38\u677e\u6563\u2014\u2014 \u4e0d\u540c\u4e8e\u4f20\u7edf\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff08RDBMS\uff09\uff0cHBase \u5141\u8bb8\u8868\u4e0b\u67d0\u884c\u67d0\u5217\u503c\u4e3a\u7a7a\u65f6\u4e0d\u505a\u4efb\u4f55\u5b58\u50a8\uff08\u4e5f\u4e0d\u5360\u4f4d\uff09\uff0c\u51cf\u5c11\u4e86\u7a7a\u95f4\u5360\u7528\u4e5f\u63d0\u9ad8\u4e86\u8bfb\u6027\u80fd\u3002<\/p>\n<p>\u4e0d\u8fc7\u9274\u4e8e\u5176\u5b83NoSql\u6570\u636e\u5e93\u4e5f\u5177\u6709\u540c\u6837\u7075\u6d3b\u7684\u6570\u636e\u5b58\u50a8\u7ed3\u6784\uff0c\u8be5\u4f18\u52bf\u5728\u672c\u6b21\u9009\u578b\u4e2d\u5e76\u4e0d\u51fa\u5f69\u3002<br \/>\n\u6211\u4eec\u4ee5\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u4e86\u89e3\u4f7f\u7528 RDBMS \u548c HBase \u5404\u81ea\u7684\u89e3\u51b3\u65b9\u5f0f\uff1a<\/p>\n<p>\u2474 RDBMS\u65b9\u6848\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtw0sbBKmQ1KpDWdGZ9JfAiaGib3n28YpISRckxHrKHcED9XnoP3x2O7Wg\/640?wx_fmt=jpeg&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtw0sbBKmQ1KpDWdGZ9JfAiaGib3n28YpISRckxHrKHcED9XnoP3x2O7Wg\/0?wx_fmt=jpeg\" data-type=\"jpeg\" data-ratio=\"0.29856115107913667\" data-w=\"\" \/><\/p>\n<p>\u5176\u4e2dArticle\u8868\u683c\u5f0f\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAt9hCzRfhCVarf7XkfneJgqJBIvn9sY42PyuWQibXA2IVCZSmhFwPR0VQ\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAt9hCzRfhCVarf7XkfneJgqJBIvn9sY42PyuWQibXA2IVCZSmhFwPR0VQ\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.26798561151079137\" data-w=\"\" \/><\/p>\n<p>Author\u8868\u683c\u5f0f\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"data:image\/png;base64,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\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtgv4kP1RYLfIgTibWlzzh1WWK1DlEu35YBRkBTytcFHm0ic3y805tqHEg\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.11049723756906077\" data-w=\"543\" \/><\/p>\n<p>\u2475 \u7b49\u4ef7\u7684HBase\u65b9\u6848\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAt75Rdicj7V33fDQhmjibkUliceMRFiboRBf9z4pX4X8GPY7emFbAbR8ic82w\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAt75Rdicj7V33fDQhmjibkUliceMRFiboRBf9z4pX4X8GPY7emFbAbR8ic82w\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.12410071942446044\" data-w=\"\" \/><\/p>\n<p>\u5bf9\u4e8e\u524d\u7aef\u800c\u8a00\uff0c\u8fd9\u91cc\u7684 Column Keys \u548c Column Family \u53ef\u4ee5\u770b\u4e3a\u8fd9\u6837\u7684\u5173\u7cfb\uff1a<\/p>\n<blockquote><p><span class=\"\">columId1<\/span><span class=\"\"> = <\/span><span class=\"\">{<\/span> <span class=\"\">\/\/id=1\u7684\u884c<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">article<\/span><span class=\"\">: <\/span><span class=\"\">{<\/span><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/ColumnFamily-article<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">title<\/span><span class=\"\">: <\/span><span class=\"\">XXX<\/span><span class=\"\">,<\/span><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/ColumnFamily-article\u4e0b\u7684key\u4e4b\u4e00<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">content<\/span><span class=\"\">: <\/span><span class=\"\">XXX<\/span><span class=\"\">,<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">tags<\/span><span class=\"\">: <\/span><span class=\"\">XXX<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">},<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">author<\/span><span class=\"\">: <\/span><span class=\"\">{<\/span><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/ColumnFamily-author<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">name<\/span><span class=\"\">: <\/span><span class=\"\">XXX<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">nickname<\/span><span class=\"\">: <\/span><span class=\"\">XXX<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p>}<\/p><\/blockquote>\n<p>1.2 \u6027\u80fd<\/p>\n<p>HStore\u5b58\u50a8\u662fHBase\u5b58\u50a8\u7684\u6838\u5fc3\uff0c\u5b83\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u4e00\u90e8\u5206\u662fMemStore\uff0c\u4e00\u90e8\u5206\u662fStoreFiles\u3002<\/p>\n<p>MemStore \u662f Sorted Memory Buffer\uff0c\u7528\u6237\u5199\u5165\u7684\u6570\u636e\u9996\u5148\u4f1a\u653e\u5165MemStore\uff0c\u5f53MemStore\u6ee1\u4e86\u4ee5\u540e\u4f1aFlush\u6210\u4e00\u4e2aStoreFile\uff08\u5e95\u5c42\u5b9e\u73b0\u662fHFile\uff09\uff0c\u5f53StoreFile\u6587\u4ef6\u6570\u91cf\u589e\u957f\u5230\u4e00\u5b9a\u9608\u503c\uff0c\u4f1a\u89e6\u53d1Compact\u5408\u5e76\u64cd\u4f5c\uff0c\u5c06\u591a\u4e2aStoreFiles\u5408\u5e76\u6210\u4e00\u4e2aStoreFile\uff0c\u5408\u5e76\u8fc7\u7a0b\u4e2d\u4f1a\u8fdb\u884c\u7248\u672c\u5408\u5e76\u548c\u6570\u636e\u5220\u9664\uff0c\u56e0\u6b64\u53ef\u4ee5\u770b\u51faHBase\u5176\u5b9e\u53ea\u6709\u589e\u52a0\u6570\u636e\uff0c\u6240\u6709\u7684\u66f4\u65b0\u548c\u5220\u9664\u64cd\u4f5c\u90fd\u662f\u5728\u540e\u7eed\u7684compact\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u7684\uff0c\u8fd9\u4f7f\u5f97\u7528\u6237\u7684\u5199\u64cd\u4f5c\u53ea\u8981\u8fdb\u5165\u5185\u5b58\u4e2d\u5c31\u53ef\u4ee5\u7acb\u5373\u8fd4\u56de\uff0c\u4fdd\u8bc1\u4e86HBase I\/O\u7684\u9ad8\u6027\u80fd\u3002<\/p>\n<p>1.3 \u6570\u636e\u7248\u672c<\/p>\n<p>Hbase \u8fd8\u80fd\u76f4\u63a5\u68c0\u7d22\u5230\u5f80\u6614\u7248\u672c\u7684\u6570\u636e\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u65e7\u6570\u636e\u5e76\u6ca1\u6709\u5373\u65f6\u88ab\u6e05\u9664\uff0c\u800c\u662f\u4fdd\u7559\u7740\uff1a<\/p>\n<p>Hbase \u4e2d\u901a\u8fc7 row+columns \u6240\u6307\u5b9a\u7684\u4e00\u4e2a\u5b58\u8d2e\u5355\u5143\u79f0\u4e3acell\u3002\u6bcf\u4e2a cell\u90fd\u4fdd\u5b58\u7740\u540c\u4e00\u4efd\u6570\u636e\u7684\u591a\u4e2a\u7248\u672c\u2014\u2014\u7248\u672c\u901a\u8fc7\u65f6\u95f4\u6233\u6765\u7d22\u5f15\u3002<\/p>\n<p>\u65f6\u95f4\u6233\u7684\u7c7b\u578b\u662f 64\u4f4d\u6574\u578b\u3002\u65f6\u95f4\u6233\u53ef\u4ee5\u7531Hbase(\u5728\u6570\u636e\u5199\u5165\u65f6\u81ea\u52a8 )\u8d4b\u503c\uff0c\u6b64\u65f6\u65f6\u95f4\u6233\u662f\u7cbe\u786e\u5230\u6beb\u79d2\u7684\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\u3002\u65f6\u95f4\u6233\u4e5f\u53ef\u4ee5\u7531\u5ba2\u6237\u663e\u5f0f\u8d4b\u503c\u3002\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u8981\u907f\u514d\u6570\u636e\u7248\u672c\u51b2\u7a81\uff0c\u5c31\u5fc5\u987b\u81ea\u5df1\u751f\u6210\u5177\u6709\u552f\u4e00\u6027\u7684\u65f6\u95f4\u6233\u3002\u6bcf\u4e2a cell\u4e2d\uff0c\u4e0d\u540c\u7248\u672c\u7684\u6570\u636e\u6309\u7167\u65f6\u95f4\u5012\u5e8f\u6392\u5e8f\uff0c\u5373\u6700\u65b0\u7684\u6570\u636e\u6392\u5728\u6700\u524d\u9762\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u6570\u636e\u5b58\u5728\u8fc7\u591a\u7248\u672c\u9020\u6210\u7684\u7684\u7ba1\u7406\u00a0(\u5305\u62ec\u5b58\u8d2e\u548c\u7d22\u5f15)\u8d1f\u62c5\uff0cHbase\u63d0\u4f9b\u4e86\u4e24\u79cd\u6570\u636e\u7248\u672c\u56de\u6536\u65b9\u5f0f\u3002\u4e00\u662f\u4fdd\u5b58\u6570\u636e\u7684\u6700\u540en\u4e2a\u7248\u672c\uff0c\u4e8c\u662f\u4fdd\u5b58\u6700\u8fd1\u4e00\u6bb5\u65f6\u95f4\u5185\u7684\u7248\u672c(\u6bd4\u5982\u6700\u8fd1\u4e03\u5929)\u3002\u7528\u6237\u53ef\u4ee5\u9488\u5bf9\u6bcf\u4e2a\u5217\u65cf\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n<p>1.4\u00a0CAP\u7c7b\u522b<br \/>\n\u5c5e\u4e8eCP\u7c7b\u578b\u3002<\/p>\n<p><strong>2. Node\u4e0b\u7684\u4f7f\u7528<\/strong><\/p>\n<p>HBase\u7684\u76f8\u5173\u64cd\u4f5c\u53ef\u53c2\u8003\u4e0b\u8868\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtJTmQMicRKKv8vsEN9GTWNT0mX6Hia7VuvOmp7DQoze1Qx5VbsicDXplgA\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtJTmQMicRKKv8vsEN9GTWNT0mX6Hia7VuvOmp7DQoze1Qx5VbsicDXplgA\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.368705035971223\" data-w=\"\" \/><\/p>\n<p>\u5728node\u73af\u5883\u4e0b\uff0c\u53ef\u901a\u8fc7\u00a0node-hbase\u00a0\u6765\u5b9e\u73b0\u76f8\u5173\u8bbf\u95ee\u548c\u64cd\u4f5c\uff0c\u6ce8\u610f\u8be5\u5de5\u5177\u5305\u4f9d\u8d56\u4e8e PHYTHON2.X\uff083.X\u4e0d\u652f\u6301\uff09\u548cCoffee\u3002<\/p>\n<p>\u5982\u679c\u662f\u5728 window \u7cfb\u7edf\u4e0b\u8fd8\u9700\u4f9d\u8d56 .NET framwork2.0\uff0c64\u4f4d\u7cfb\u7edf\u53ef\u80fd\u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7\u5b89\u88c5\u5305\u5b89\u88c5\u3002<\/p>\n<p>\u5b98\u65b9\u793a\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">var<\/span> <span class=\"\">assert<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;assert&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">var<\/span> <span class=\"\">hbase<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;hbase&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">hbase<\/span><span class=\"\">({<\/span> <span class=\"\">host<\/span><span class=\"\">: <\/span><span class=\"\">&#8216;127.0.0.1&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">port<\/span><span class=\"\">: <\/span><span class=\"\">8080<\/span> <span class=\"\">})<\/span><\/p>\n<p><span class=\"\">.<\/span><span class=\"\">table<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;my_table&#8217;<\/span> <span class=\"\">)<\/span><\/p>\n<p>\/\/\u521b\u5efa\u4e00\u4e2aColumn Family<\/p>\n<p><span class=\"\">.<\/span><span class=\"\">create<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;my_column_family&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">success<\/span><span class=\"\">){<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">this<\/span><span class=\"\">.<\/span><span class=\"\">row<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;my_row&#8217;<\/span><span class=\"\">)<\/span><span class=\"\">\u00a0\u00a0 <\/span><span class=\"\">\/\/\u5b9a\u4f4d\u5230\u6307\u5b9a\u884c<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">.<\/span><span class=\"\">put<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;my_column_family:my_column&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8216;my value&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">success<\/span><span class=\"\">){<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">this<\/span><span class=\"\">.<\/span><span class=\"\">get<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;my_column_family&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">cells<\/span><span class=\"\">){<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">this<\/span><span class=\"\">.<\/span><span class=\"\">exists<\/span><span class=\"\">(<\/span><span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">exists<\/span><span class=\"\">){<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">assert<\/span><span class=\"\">.<\/span><span class=\"\">ok<\/span><span class=\"\">(<\/span><span class=\"\">exists<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p>});<\/p><\/blockquote>\n<p>\u6570\u636e\u68c0\u7d22\uff1a<\/p>\n<blockquote><p>client<\/p>\n<p><span class=\"\">.<\/span><span class=\"\">table<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;node_table&#8217;<\/span><span class=\"\">)<\/span><\/p>\n<p><span class=\"\">.<\/span><span class=\"\">scan<\/span><span class=\"\">({<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">startRow<\/span><span class=\"\">: <\/span><span class=\"\">&#8216;my_row&#8217;<\/span><span class=\"\">,<\/span><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/\u8d77\u59cb\u884c<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">maxVersions<\/span><span class=\"\">: <\/span><span class=\"\">1<\/span><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/\u7248\u672c<\/span><\/p>\n<p><span class=\"\">},<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">rows<\/span><span class=\"\">){<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">rows<\/span><span class=\"\">);<\/span><\/p>\n<p>});<\/p><\/blockquote>\n<p>\u53e6\u6709\u00a0hbase-client\u00a0\u4e5f\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\uff0c\u5177\u4f53API\u53c2\u7167\u5176\u6587\u6863\u3002<\/p>\n<p><strong>3. \u4f18\u7f3a\u70b9<\/strong><\/p>\n<p>\u4f18\u52bf<\/p>\n<p>1. \u5b58\u50a8\u5bb9\u91cf\u5927\uff0c\u4e00\u4e2a\u8868\u53ef\u4ee5\u5bb9\u7eb3\u4e0a\u4ebf\u884c\uff0c\u4e0a\u767e\u4e07\u5217\uff1b<\/p>\n<p>2. \u53ef\u901a\u8fc7\u7248\u672c\u8fdb\u884c\u68c0\u7d22\uff0c\u80fd\u641c\u5230\u6240\u9700\u7684\u5386\u53f2\u7248\u672c\u6570\u636e\uff1b<\/p>\n<p>3. \u8d1f\u8f7d\u9ad8\u65f6\uff0c\u53ef\u901a\u8fc7\u7b80\u5355\u7684\u6dfb\u52a0\u673a\u5668\u6765\u5b9e\u73b0\u6c34\u5e73\u5207\u5206\u6269\u5c55\uff0c\u8ddfHadoop\u7684\u65e0\u7f1d\u96c6\u6210\u4fdd\u969c\u4e86\u5176\u6570\u636e\u53ef\u9760\u6027\uff08HDFS\uff09\u548c\u6d77\u91cf\u6570\u636e\u5206\u6790\u7684\u9ad8\u6027\u80fd\uff08MapReduce\uff09\uff1b<\/p>\n<p>4. \u5728\u7b2c3\u70b9\u7684\u57fa\u7840\u4e0a\u53ef\u6709\u6548\u907f\u514d\u5355\u70b9\u6545\u969c\u7684\u53d1\u751f\u3002<\/p>\n<p>\u7f3a\u70b9<\/p>\n<p>1. \u57fa\u4e8eJava\u8bed\u8a00\u5b9e\u73b0\u53caHadoop\u67b6\u6784\u610f\u5473\u7740\u5176API\u66f4\u9002\u7528\u4e8eJava\u9879\u76ee\uff1b<\/p>\n<p>2. node\u5f00\u53d1\u73af\u5883\u4e0b\u6240\u9700\u4f9d\u8d56\u9879\u8f83\u591a\u3001\u914d\u7f6e\u9ebb\u70e6\uff08\u6216\u4e0d\u77e5\u5982\u4f55\u914d\u7f6e\uff0c\u5982\u6301\u4e45\u5316\u914d\u7f6e\uff09\uff0c\u7f3a\u4e4f\u6587\u6863\uff1b<\/p>\n<p>3. \u5360\u7528\u5185\u5b58\u5f88\u5927\uff0c\u4e14\u9274\u4e8e\u5efa\u7acb\u5728\u4e3a\u6279\u91cf\u5206\u6790\u800c\u4f18\u5316\u7684HDFS\u4e0a\uff0c\u5bfc\u81f4\u8bfb\u53d6\u6027\u80fd\u4e0d\u9ad8\uff1b<\/p>\n<p>4. API\u76f8\u6bd4\u5176\u5b83 NoSql \u7684\u76f8\u5bf9\u7b28\u62d9\u3002<\/p>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<p>1. bigtable\u7c7b\u578b\u7684\u6570\u636e\u5b58\u50a8\uff1b<\/p>\n<p>2. \u5bf9\u6570\u636e\u6709\u7248\u672c\u67e5\u8be2\u9700\u6c42\uff1b<\/p>\n<p>3. \u5e94\u5bf9\u8d85\u5927\u6570\u636e\u91cf\u8981\u6c42\u6269\u5c55\u7b80\u5355\u7684\u9700\u6c42\u3002<\/p>\n<p><strong>Redis<\/strong><\/p>\n<p>Redis \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u4f7f\u7528ANSI C\u8bed\u8a00\u7f16\u5199\u3001\u652f\u6301\u7f51\u7edc\u3001\u53ef\u57fa\u4e8e\u5185\u5b58\u4ea6\u53ef\u6301\u4e45\u5316\u7684\u65e5\u5fd7\u578b\u3001Key-Value\u6570\u636e\u5e93\uff0c\u5e76\u63d0\u4f9b\u591a\u79cd\u8bed\u8a00\u7684API\u3002\u76ee\u524d\u7531VMware\u4e3b\u6301\u5f00\u53d1\u5de5\u4f5c\u3002<br \/>\n<strong>1. \u7279\u70b9<\/strong><\/p>\n<p>1.1 \u6570\u636e\u683c\u5f0f<br \/>\nRedis\u00a0\u901a\u5e38\u88ab\u79f0\u4e3a\u6570\u636e\u7ed3\u6784\u670d\u52a1\u5668\uff0c\u56e0\u4e3a\u503c\uff08value\uff09\u53ef\u4ee5\u662f \u5b57\u7b26\u4e32(String), \u54c8\u5e0c(Hash\/Map), \u5217\u8868(list), \u96c6\u5408(sets) \u548c \u6709\u5e8f\u96c6\u5408(sorted sets)\u4e94\u79cd\u7c7b\u578b\uff0c\u64cd\u4f5c\u975e\u5e38\u65b9\u4fbf\u3002\u6bd4\u5982\uff0c\u5982\u679c\u4f60\u5728\u505a\u597d\u53cb\u7cfb\u7edf\uff0c\u67e5\u770b\u81ea\u5df1\u7684\u597d\u53cb\u5173\u7cfb\uff0c\u5982\u679c\u91c7\u7528\u5176\u4ed6\u7684key-value\u7cfb\u7edf\uff0c\u5219\u5fc5\u987b\u628a\u5bf9\u5e94\u7684\u597d\u53cb\u62fc\u63a5\u6210\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u5728\u63d0\u53d6\u597d\u53cb\u65f6\uff0c\u518d\u628avalue\u8fdb\u884c\u89e3\u6790\uff0c\u800credis\u5219\u76f8\u5bf9\u7b80\u5355\uff0c\u76f4\u63a5\u652f\u6301list\u7684\u5b58\u50a8(\u91c7\u7528\u53cc\u5411\u94fe\u8868\u6216\u8005\u538b\u7f29\u94fe\u8868\u7684\u5b58\u50a8\u65b9\u5f0f)\u3002<br \/>\n\u6211\u4eec\u6765\u770b\u4e0b\u8fd9\u4e94\u79cd\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<p>\u2474 String<\/p>\n<ul class=\"list-paddingleft-2\">\n<li>string \u662f Redis\u00a0\u6700\u57fa\u672c\u7684\u7c7b\u578b\uff0c\u4f60\u53ef\u4ee5\u7406\u89e3\u6210\u4e0e Memcached \u4e00\u6a21\u4e00\u6837\u7684\u7c7b\u578b\uff0c\u4e00\u4e2akey\u5bf9\u5e94\u4e00\u4e2avalue\u3002<\/li>\n<li>string \u7c7b\u578b\u662f\u4e8c\u8fdb\u5236\u5b89\u5168\u7684\u3002\u610f\u601d\u662f Redis\u00a0\u7684 string \u53ef\u4ee5\u5305\u542b\u4efb\u4f55\u6570\u636e\u3002\u6bd4\u5982 jpg \u56fe\u7247\u6216\u8005\u5e8f\u5217\u5316\u7684\u5bf9\u8c61 \u3002<\/li>\n<li>string \u7c7b\u578b\u662f Redis \u6700\u57fa\u672c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e00\u4e2a\u952e\u6700\u5927\u80fd\u5b58\u50a8512MB\u3002<\/li>\n<\/ul>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">SET name zfpx<\/span><\/p>\n<p>OK<\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">GET <\/span><span class=\"\">name<\/span><\/p>\n<p>&#8220;zfpx&#8221;<\/p><\/blockquote>\n<p>\u5728\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d\u6211\u4eec\u4f7f\u7528\u4e86 Redis \u7684 SET \u548c GET \u547d\u4ee4\u3002\u952e\u4e3a name\uff0c\u5bf9\u5e94\u7684\u503c\u4e3a\u201dzfpx\u201d\u3002 \u6ce8\u610f\uff1a\u4e00\u4e2a\u952e\u6700\u5927\u80fd\u5b58\u50a8512MB\u3002<\/p>\n<p>\u2475 Hash<\/p>\n<ul class=\"list-paddingleft-2\">\n<li>Redis hash \u662f\u4e00\u4e2a\u952e\u503c\u5bf9\u96c6\u5408\u3002<\/li>\n<li>Redis hash \u662f\u4e00\u4e2a string \u7c7b\u578b\u7684 field \u548c value \u7684\u6620\u5c04\u8868\uff0chash \u7279\u522b\u9002\u5408\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">HMSET <\/span><span class=\"\">user<\/span><span class=\"\">:<\/span><span class=\"\">1<\/span> <span class=\"\">username zfpx <\/span><span class=\"\">password<\/span> <span class=\"\">123<\/span><\/p>\n<p>OK<\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">HGETALL <\/span><span class=\"\">user<\/span><span class=\"\">:<\/span><span class=\"\">1<\/span><\/p>\n<p><span class=\"\">1<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;username&#8221;<\/span><\/p>\n<p><span class=\"\">2<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx&#8221;<\/span><\/p>\n<p><span class=\"\">3<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;password&#8221;<\/span><\/p>\n<p><span class=\"\">4<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;123&#8221;<\/span><\/p><\/blockquote>\n<p>\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d hash \u6570\u636e\u7c7b\u578b\u5b58\u50a8\u4e86\u5305\u542b\u7528\u6237\u811a\u672c\u4fe1\u606f\u7684\u7528\u6237\u5bf9\u8c61\u3002 \u5b9e\u4f8b\u4e2d\u6211\u4eec\u4f7f\u7528\u4e86 Redis HMSET, HGETALL \u547d\u4ee4\uff0cuser:1 \u4e3a\u952e\u503c\u3002 \u6bcf\u4e2a hash \u53ef\u4ee5\u5b58\u50a8 232 \u2013 1 \u952e\u503c\u5bf9\uff0840\u591a\u4ebf\uff09\u3002<\/p>\n<p>\u2476 List<\/p>\n<p>Redis \u5217\u8868\u662f\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u6309\u7167\u63d2\u5165\u987a\u5e8f\u6392\u5e8f\u3002\u4f60\u53ef\u4ee5\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\u5bfc\u5217\u8868\u7684\u5934\u90e8\uff08\u5de6\u8fb9\uff09\u6216\u8005\u5c3e\u90e8\uff08\u53f3\u8fb9\uff09\u3002<\/p>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">lpush name zfpx1<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">lpush name zfpx2<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">2<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">lpush name zfpx3<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">3<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">lrange <\/span><span class=\"\">name<\/span> <span class=\"\">0<\/span><span class=\"\"> &#8211;<\/span><span class=\"\">1<\/span><\/p>\n<p><span class=\"\">1<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx3&#8221;<\/span><\/p>\n<p><span class=\"\">2<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx2&#8221;<\/span><\/p>\n<p><span class=\"\">3<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx1&#8221;<\/span><\/p><\/blockquote>\n<p>\u5217\u8868\u6700\u591a\u53ef\u5b58\u50a8 232\u00a0\u2013 1 \u5143\u7d20 (4294967295, \u6bcf\u4e2a\u5217\u8868\u53ef\u5b58\u50a840\u591a\u4ebf)\u3002<\/p>\n<p>\u2477 Sets<\/p>\n<p>Redis\u7684Set\u662fstring\u7c7b\u578b\u7684\u65e0\u5e8f\u96c6\u5408\u3002 \u96c6\u5408\u662f\u901a\u8fc7\u54c8\u5e0c\u8868\u5b9e\u73b0\u7684\uff0c\u6240\u4ee5\u6dfb\u52a0\uff0c\u5220\u9664\uff0c\u67e5\u627e\u7684\u590d\u6742\u5ea6\u90fd\u662fO(1)\u3002<\/p>\n<p>\u6dfb\u52a0\u4e00\u4e2astring\u5143\u7d20\u5230 key \u5bf9\u5e94\u7684 set \u96c6\u5408\u4e2d\uff0c\u6210\u529f\u8fd4\u56de1\uff0c\u5982\u679c\u5143\u7d20\u5df2\u7ecf\u5728\u96c6\u5408\u4e2d\u8fd4\u56de0\uff0ckey\u5bf9\u5e94\u7684set\u4e0d\u5b58\u5728\u8fd4\u56de\u9519\u8bef\uff0c\u6307\u4ee4\u683c\u5f0f\u4e3a<\/p>\n<blockquote><p><span class=\"\">sadd key <\/span><span class=\"\">member<\/span><\/p><\/blockquote>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">sadd school zfpx1<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">sadd school zfpx1<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">0<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">sadd school zfpx2<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">sadd school zfpx2<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">0<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">smembers <\/span><span class=\"\">school<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">1<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx1&#8221;<\/span><\/p>\n<p><span class=\"\">2<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx2&#8221;<\/span><\/p><\/blockquote>\n<p>\u6ce8\u610f\uff1a\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d zfpx1 \u6dfb\u52a0\u4e86\u4e24\u6b21\uff0c\u4f46\u6839\u636e\u96c6\u5408\u5185\u5143\u7d20\u7684\u552f\u4e00\u6027\uff0c\u7b2c\u4e8c\u6b21\u63d2\u5165\u7684\u5143\u7d20\u5c06\u88ab\u5ffd\u7565\u3002 \u96c6\u5408\u4e2d\u6700\u5927\u7684\u6210\u5458\u6570\u4e3a 232 \u2013 1 (4294967295, \u6bcf\u4e2a\u96c6\u5408\u53ef\u5b58\u50a840\u591a\u4ebf\u4e2a\u6210\u5458)\u3002<\/p>\n<p>\u2478 sorted sets\/zset<\/p>\n<p>Redis zset \u548c set \u4e00\u6837\u4e5f\u662fstring\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408,\u4e14\u4e0d\u5141\u8bb8\u91cd\u590d\u7684\u6210\u5458\u3002 \u4e0d\u540c\u7684\u662f\u6bcf\u4e2a\u5143\u7d20\u90fd\u4f1a\u5173\u8054\u4e00\u4e2adouble\u7c7b\u578b\u7684\u5206\u6570\u3002redis\u6b63\u662f\u901a\u8fc7\u5206\u6570\u6765\u4e3a\u96c6\u5408\u4e2d\u7684\u6210\u5458\u8fdb\u884c\u4ece\u5c0f\u5230\u5927\u7684\u6392\u5e8f\u3002<\/p>\n<p>zset\u7684\u6210\u5458\u662f\u552f\u4e00\u7684,\u4f46\u5206\u6570(score)\u5374\u53ef\u4ee5\u91cd\u590d\u3002\u53ef\u4ee5\u901a\u8fc7 zadd \u547d\u4ee4\uff08\u683c\u5f0f\u5982\u4e0b\uff09 \u6dfb\u52a0\u5143\u7d20\u5230\u96c6\u5408\uff0c\u82e5\u5143\u7d20\u5728\u96c6\u5408\u4e2d\u5b58\u5728\u5219\u66f4\u65b0\u5bf9\u5e94score<\/p>\n<blockquote><p><span class=\"\">zadd key score <\/span><span class=\"\">member<\/span><\/p><\/blockquote>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">zadd <\/span><span class=\"\">school<\/span> <span class=\"\">0<\/span> <span class=\"\">zfpx1<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">zadd <\/span><span class=\"\">school<\/span> <span class=\"\">2<\/span> <span class=\"\">zfpx2<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">zadd <\/span><span class=\"\">school<\/span> <span class=\"\">0<\/span> <span class=\"\">zfpx3<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">1<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">zadd <\/span><span class=\"\">school<\/span> <span class=\"\">1<\/span> <span class=\"\">zfpx4<\/span><\/p>\n<p><span class=\"\">(<\/span><span class=\"\">integer<\/span><span class=\"\">)<\/span> <span class=\"\">0<\/span><\/p>\n<p><span class=\"\">redis<\/span> <span class=\"\">127.0.0.1<\/span><span class=\"\">:<\/span><span class=\"\">6379<\/span><span class=\"\">&gt; <\/span><span class=\"\">ZRANGEBYSCORE <\/span><span class=\"\">school<\/span> <span class=\"\">0<\/span> <span class=\"\">100<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">1<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx1&#8221;<\/span><\/p>\n<p><span class=\"\">2<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx3&#8221;<\/span><\/p>\n<p><span class=\"\">3<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx4&#8221;<\/span><\/p>\n<p><span class=\"\">4<\/span><span class=\"\">)<\/span> <span class=\"\">&#8220;zfpx2&#8221;<\/span><\/p><\/blockquote>\n<p>1.2 \u6027\u80fd<\/p>\n<p>Redis\u6570\u636e\u5e93\u5b8c\u5168\u5728\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\u5904\u7406\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u6bcf\u79d2\u80fd\u6267\u884c\u7ea611\u4e07\u96c6\u5408\uff0c\u6bcf\u79d2\u7ea681000+\u6761\u8bb0\u5f55\u3002<\/p>\n<p>Redis\u7684\u6570\u636e\u80fd\u786e\u4fdd\u4e00\u81f4\u6027\u2014\u2014\u6240\u6709Redis\u64cd\u4f5c\u662f\u539f\u5b50\u6027\uff08Atomicity\uff0c\u610f\u5473\u7740\u64cd\u4f5c\u7684\u4e0d\u53ef\u518d\u5206\uff0c\u8981\u4e48\u6267\u884c\u8981\u4e48\u4e0d\u6267\u884c\uff09\u7684\uff0c\u8fd9\u4fdd\u8bc1\u4e86\u5982\u679c\u4e24\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8bbf\u95ee\u7684Redis\u670d\u52a1\u5668\u5c06\u83b7\u5f97\u66f4\u65b0\u540e\u7684\u503c\u3002<\/p>\n<p>1.3 \u6301\u4e45\u5316<\/p>\n<p>\u901a\u8fc7\u5b9a\u65f6\u5feb\u7167\uff08snapshot\uff09\u548c\u57fa\u4e8e\u8bed\u53e5\u7684\u8ffd\u52a0\uff08AppendOnlyFile\uff0caof\uff09\u4e24\u79cd\u65b9\u5f0f\uff0credis\u53ef\u4ee5\u652f\u6301\u6570\u636e\u6301\u4e45\u5316\u2014\u2014\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u5230\u78c1\u76d8\u4e0a\uff0c\u65b9\u4fbf\u5728\u5b95\u673a\u7b49\u7a81\u53d1\u60c5\u51b5\u4e0b\u5feb\u901f\u6062\u590d\u3002<\/p>\n<p>1.4 CAP\u7c7b\u522b<\/p>\n<p>\u5c5e\u4e8eCP\u7c7b\u578b\u3002<\/p>\n<p><strong>2. Node\u4e0b\u7684\u4f7f\u7528<\/strong><\/p>\n<p>node \u4e0b\u53ef\u4f7f\u7528\u00a0node_redis\u00a0\u6765\u5b9e\u73b0 redis \u5ba2\u6237\u7aef\u64cd\u4f5c\uff1a<\/p>\n<blockquote><p><span class=\"\">var<\/span> <span class=\"\">redis<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;redis&#8221;<\/span><span class=\"\">),<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">client<\/span><span class=\"\"> = <\/span><span class=\"\">redis<\/span><span class=\"\">.<\/span><span class=\"\">createClient<\/span><span class=\"\">();<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\/\/ if you&#8217;d like to select database 3, instead of 0 (default), call<\/p>\n<p>\/\/ client.select(3, function() { \/* &#8230; *\/ });<\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">on<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;error&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;Error &#8220;<\/span><span class=\"\"> + <\/span><span class=\"\">err<\/span><span class=\"\">);<\/span><\/p>\n<p>});<\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">set<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;string key&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8220;string val&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">redis<\/span><span class=\"\">.<\/span><span class=\"\">print<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">hset<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;hash key&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8220;hashtest 1&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8220;some value&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">redis<\/span><span class=\"\">.<\/span><span class=\"\">print<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">hset<\/span><span class=\"\">([<\/span><span class=\"\">&#8220;hash key&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8220;hashtest 2&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8220;some other value&#8221;<\/span><span class=\"\">],<\/span> <span class=\"\">redis<\/span><span class=\"\">.<\/span><span class=\"\">print<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">hkeys<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;hash key&#8221;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">replies<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">replies<\/span><span class=\"\">.<\/span><span class=\"\">length<\/span><span class=\"\"> + <\/span><span class=\"\">&#8221; replies:&#8221;<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">replies<\/span><span class=\"\">.<\/span><span class=\"\">forEach<\/span><span class=\"\">(<\/span><span class=\"\">function<\/span> <span class=\"\">(<\/span><span class=\"\">reply<\/span><span class=\"\">,<\/span> <span class=\"\">i<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8221;\u00a0\u00a0\u00a0\u00a0&#8220;<\/span><span class=\"\"> + <\/span><span class=\"\">i<\/span><span class=\"\"> + <\/span><span class=\"\">&#8220;: &#8220;<\/span><span class=\"\"> + <\/span><span class=\"\">reply<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">client<\/span><span class=\"\">.<\/span><span class=\"\">quit<\/span><span class=\"\">();<\/span><\/p>\n<p>});<\/p><\/blockquote>\n<p><strong>3. \u4f18\u7f3a\u70b9<\/strong><\/p>\n<p>\u4f18\u52bf<\/p>\n<p>1. \u975e\u5e38\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\uff1b<\/p>\n<p>2. Redis\u63d0\u4f9b\u4e86\u4e8b\u52a1\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u4e00\u4e32 \u547d\u4ee4\u7684\u539f\u5b50\u6027\uff0c\u4e2d\u95f4\u4e0d\u4f1a\u88ab\u4efb\u4f55\u64cd\u4f5c\u6253\u65ad\uff1b<\/p>\n<p>3. \u6570\u636e\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u8bfb\u5199\u975e\u5e38\u7684\u9ad8\u901f\uff0c\u53ef\u4ee5\u8fbe\u523010w\/s\u7684\u9891\u7387\u3002<\/p>\n<p>\u7f3a\u70b9<\/p>\n<p>1. Redis3.0\u540e\u624d\u51fa\u6765\u5b98\u65b9\u7684\u96c6\u7fa4\u65b9\u6848\uff0c\u4f46\u4ecd\u5b58\u5728\u4e00\u4e9b\u67b6\u6784\u4e0a\u7684\u95ee\u9898\uff08\u51fa\u5904\uff09\uff1b<\/p>\n<p>2. \u6301\u4e45\u5316\u529f\u80fd\u4f53\u9a8c\u4e0d\u4f73\u2014\u2014\u901a\u8fc7\u5feb\u7167\u65b9\u6cd5\u5b9e\u73b0\u7684\u8bdd\uff0c\u9700\u8981\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c06\u6574\u4e2a\u6570\u636e\u5e93\u7684\u6570\u636e\u5199\u5230\u78c1\u76d8\u4e0a\uff0c\u4ee3\u4ef7\u975e\u5e38\u9ad8\uff1b\u800caof\u65b9\u6cd5\u53ea\u8ffd\u8e2a\u53d8\u5316\u7684\u6570\u636e\uff0c\u7c7b\u4f3c\u4e8emysql\u7684binlog\u65b9\u6cd5\uff0c\u4f46\u8ffd\u52a0log\u53ef\u80fd\u8fc7\u5927\uff0c\u540c\u65f6\u6240\u6709\u64cd\u4f5c\u5747\u8981\u91cd\u65b0\u6267\u884c\u4e00\u904d\uff0c\u6062\u590d\u901f\u5ea6\u6162\uff1b<\/p>\n<p>3. \u7531\u4e8e\u662f\u5185\u5b58\u6570\u636e\u5e93\uff0c\u6240\u4ee5\uff0c\u5355\u53f0\u673a\u5668\uff0c\u5b58\u50a8\u7684\u6570\u636e\u91cf\uff0c\u8ddf\u673a\u5668\u672c\u8eab\u7684\u5185\u5b58\u5927\u5c0f\u3002\u867d\u7136redis\u672c\u8eab\u6709key\u8fc7\u671f\u7b56\u7565\uff0c\u4f46\u662f\u8fd8\u662f\u9700\u8981\u63d0\u524d\u9884\u4f30\u548c\u8282\u7ea6\u5185\u5b58\u3002\u5982\u679c\u5185\u5b58\u589e\u957f\u8fc7\u5feb\uff0c\u9700\u8981\u5b9a\u671f\u5220\u9664\u6570\u636e\u3002<\/p>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<p>\u9002\u7528\u4e8e\u6570\u636e\u53d8\u5316\u5feb\u4e14\u6570\u636e\u5e93\u5927\u5c0f\u53ef\u9047\u89c1\uff08\u9002\u5408\u5185\u5b58\u5bb9\u91cf\uff09\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u66f4\u5177\u4f53\u7684\u53ef\u53c2\u7167\u8fd9\u7bc7\u300aRedis \u7684 5 \u4e2a\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u300b\u8bd1\u6587\u3002<\/p>\n<p><strong>MongoDB<\/strong><\/p>\n<p>MongoDB \u662f\u4e00\u4e2a\u9ad8\u6027\u80fd\uff0c\u5f00\u6e90\uff0c\u65e0\u6a21\u5f0f\u7684\u6587\u6863\u578b\u6570\u636e\u5e93\uff0c\u5f00\u53d1\u8bed\u8a00\u662fC++\u3002\u5b83\u5728\u8bb8\u591a\u573a\u666f\u4e0b\u53ef\u7528\u4e8e\u66ff\u4ee3\u4f20\u7edf\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u6216\u952e\/\u503c\u5b58\u50a8\u65b9\u5f0f\u3002<\/p>\n<p><strong>1.\u7279\u70b9<\/strong><\/p>\n<p>1.1 \u6570\u636e\u683c\u5f0f<\/p>\n<p>\u5728 MongoDB \u4e2d\uff0c\u6587\u6863\u662f\u5bf9\u6570\u636e\u7684\u62bd\u8c61\uff0c\u5b83\u7684\u8868\u73b0\u5f62\u5f0f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684 BSON\uff08Binary JSON \uff09\u3002<\/p>\n<p>BSON \u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u683c\u5f0f\u3002MongoDB \u80fd\u591f\u4f7f\u7528 BSON\uff0c\u5e76\u5c06 BSON \u4f5c\u4e3a\u6570\u636e\u7684\u5b58\u50a8\u5b58\u653e\u5728\u78c1\u76d8\u4e2d\u3002<\/p>\n<p>BSON \u662f\u4e3a\u6548\u7387\u800c\u8bbe\u8ba1\u7684\uff0c\u5b83\u53ea\u9700\u8981\u4f7f\u7528\u5f88\u5c11\u7684\u7a7a\u95f4\uff0c\u540c\u65f6\u5176\u7f16\u7801\u548c\u89e3\u7801\u90fd\u662f\u975e\u5e38\u5feb\u901f\u7684\u3002\u5373\u4f7f\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0cBSON\u683c\u5f0f\u4e5f\u6bd4JSON\u683c\u5f0f\u518d\u6700\u597d\u7684\u60c5\u51b5\u4e0b\u5b58\u50a8\u6548\u7387\u9ad8\u3002<\/p>\n<p>\u5bf9\u4e8e\u524d\u7aef\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u4e00\u4e2a\u201c\u6587\u6863\u201d\u5c31\u76f8\u5f53\u4e8e\u4e00\u4e2a\u5bf9\u8c61\uff1a<\/p>\n<blockquote><p><span class=\"\">{<\/span>\u201c<span class=\"\">name<\/span><span class=\"\">&#8220;:&#8221;<\/span><span class=\"\">mengxiangyue<\/span><span class=\"\">&#8220;,&#8221;<\/span><span class=\"\">sex<\/span><span class=\"\">&#8220;:&#8221;<\/span><span class=\"\">nan<\/span>&#8220;<span class=\"\">}<\/span><\/p><\/blockquote>\n<p>\u5bf9\u4e8e\u6587\u6863\u662f\u6709\u4e00\u4e9b\u9650\u5236\u7684\uff1a\u6709\u5e8f\u3001\u533a\u5206\u5927\u5c0f\u5199\u7684\uff0c\u6240\u4ee5\u4e0b\u9762\u7684\u4e24\u4e2a\u6587\u6863\u662f\u4e0e\u4e0a\u9762\u4e0d\u540c\u7684\uff1a<\/p>\n<blockquote><p><span class=\"\">{<\/span>\u201d<span class=\"\">sex<\/span>\u201c<span class=\"\">:<\/span><span class=\"\">&#8220;nan&#8221;<\/span><span class=\"\">,<\/span><span class=\"\">&#8220;name&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;mengxiangyue&#8221;<\/span><span class=\"\">}<\/span><span class=\"\">\u00a0\u00a0<\/span><\/p>\n<p><span class=\"\">{<\/span><span class=\"\">&#8220;Name&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;mengxiangyue&#8221;<\/span><span class=\"\">,<\/span><span class=\"\">&#8220;sex&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;nan&#8221;<\/span><span class=\"\">}<\/span><\/p><\/blockquote>\n<p>\u53e6\u5916\uff0c\u5bf9\u4e8e\u6587\u6863\u7684\u5b57\u6bb5 MongoDB \u6709\u5982\u4e0b\u7684\u9650\u5236\uff1a<\/p>\n<p>_id\u5fc5\u987b\u5b58\u5728\uff0c\u5982\u679c\u4f60\u63d2\u5165\u7684\u6587\u6863\u4e2d\u6ca1\u6709\u8be5\u5b57\u6bb5\uff0c\u90a3\u4e48 MongoDB \u4f1a\u4e3a\u8be5\u6587\u6863\u521b\u5efa\u4e00\u4e2aObjectId\u4f5c\u4e3a\u5176\u503c\u3002_id\u7684\u503c\u5fc5\u987b\u5728\u672c\u96c6\u5408\u4e2d\u662f\u552f\u4e00\u7684\u3002<\/p>\n<p>\u591a\u4e2a\u6587\u6863\u5219\u7ec4\u5408\u4e3a\u4e00\u4e2a\u201c\u96c6\u5408\u201d\u3002\u5728 MongoDB \u4e2d\u7684\u96c6\u5408\u662f\u65e0\u6a21\u5f0f\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u96c6\u5408\u4e2d\u5b58\u50a8\u7684\u6587\u6863\u7684\u7ed3\u6784\u53ef\u4ee5\u662f\u4e0d\u540c\u7684\uff0c\u6bd4\u5982\u4e0b\u9762\u7684\u4e24\u4e2a\u6587\u6863\u53ef\u4ee5\u540c\u65f6\u5b58\u5165\u5230\u4e00\u4e2a\u96c6\u5408\u4e2d\uff1a<\/p>\n<blockquote><p><span class=\"\">{<\/span><span class=\"\">&#8220;name&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;mengxiangyue&#8221;<\/span><span class=\"\">}<\/span><span class=\"\">\u00a0\u00a0<\/span><\/p>\n<p><span class=\"\">{<\/span><span class=\"\">&#8220;Name&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;mengxiangyue&#8221;<\/span><span class=\"\">,<\/span><span class=\"\">&#8220;sex&#8221;<\/span><span class=\"\">:<\/span><span class=\"\">&#8220;nan&#8221;<\/span><span class=\"\">}<\/span><\/p><\/blockquote>\n<p>1.2 \u6027\u80fd<\/p>\n<p>MongoDB \u76ee\u524d\u652f\u6301\u7684\u5b58\u50a8\u5f15\u64ce\u4e3a\u5185\u5b58\u6620\u5c04\u5f15\u64ce\u3002\u5f53 MongoDB \u542f\u52a8\u7684\u65f6\u5019\uff0c\u4f1a\u5c06\u6240\u6709\u7684\u6570\u636e\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u6258\u7ba1\u6240\u6709\u7684\u78c1\u76d8\u64cd\u4f5c\u3002\u8fd9\u79cd\u5b58\u50a8\u5f15\u64ce\u6709\u4ee5\u4e0b\u51e0\u79cd\u7279\u70b9\uff1a<\/p>\n<p>* MongoDB \u4e2d\u5173\u4e8e\u5185\u5b58\u7ba1\u7406\u7684\u4ee3\u7801\u975e\u5e38\u7cbe\u7b80\uff0c\u6bd5\u7adf\u76f8\u5173\u7684\u5de5\u4f5c\u5df2\u7ecf\u6709\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u6258\u7ba1\u3002<\/p>\n<p>* MongoDB \u670d\u52a1\u5668\u4f7f\u7528\u7684\u865a\u62df\u5185\u5b58\u5c06\u975e\u5e38\u5de8\u5927\uff0c\u5e76\u5c06\u8d85\u8fc7\u6574\u4e2a\u6570\u636e\u6587\u4ef6\u7684\u5927\u5c0f\u3002\u4e0d\u7528\u62c5\u5fc3\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u53bb\u5904\u7406\u8fd9\u4e00\u5207\u3002<\/p>\n<p>\u5728\u300aMongodb\u4ebf\u7ea7\u6570\u636e\u91cf\u7684\u6027\u80fd\u6d4b\u8bd5\u300b\u4e00\u6587\u4e2d\uff0cMongoDB \u5c55\u73b0\u4e86\u5f3a\u52b2\u7684\u5927\u6570\u636e\u5904\u7406\u6027\u80fd\uff08\u6570\u636e\u751a\u81f3\u6bd4Redis\u7684\u6f02\u4eae\u7684\u591a\uff09\u3002<\/p>\n<p>\u53e6\u5916\uff0cMongoDB \u63d0\u4f9b\u4e86\u5168\u7d22\u5f15\u652f\u6301\uff1a\u5305\u62ec\u6587\u6863\u5185\u5d4c\u5bf9\u8c61\u53ca\u6570\u7ec4\u3002Mongo\u7684\u67e5\u8be2\u4f18\u5316\u5668\u4f1a\u5206\u6790\u67e5\u8be2\u8868\u8fbe\u5f0f\uff0c\u5e76\u751f\u6210\u4e00\u4e2a\u9ad8\u6548\u7684\u67e5\u8be2\u8ba1\u5212\u3002\u901a\u5e38\u80fd\u591f\u6781\u5927\u7684\u63d0\u9ad8\u67e5\u8be2\u7684\u6548\u7387\u3002<\/p>\n<p>1.3 \u6301\u4e45\u5316<\/p>\n<p>MongoDB \u57281.8\u7248\u672c\u4e4b\u540e\u5f00\u59cb\u652f\u6301 journal\uff0c\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684 redo log\uff0c\u7528\u4e8e\u6545\u969c\u6062\u590d\u548c\u6301\u4e45\u5316\u3002<\/p>\n<p>\u5f53\u7cfb\u7edf\u542f\u52a8\u65f6\uff0cMongoDB \u4f1a\u5c06\u6570\u636e\u6587\u4ef6\u6620\u5c04\u5230\u4e00\u5757\u5185\u5b58\u533a\u57df\uff0c\u79f0\u4e4b\u4e3aShared view\uff0c\u5728\u4e0d\u5f00\u542f journal \u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u76f4\u63a5\u5199\u5165shared view\uff0c\u7136\u540e\u8fd4\u56de\uff0c\u7cfb\u7edf\u6bcf60s\u5237\u65b0\u8fd9\u5757\u5185\u5b58\u5230\u78c1\u76d8\uff0c\u8fd9\u6837\uff0c\u5982\u679c\u65ad\u7535\u6216down\u673a\uff0c\u5c31\u4f1a\u4e22\u5931\u5f88\u591a\u5185\u5b58\u4e2d\u672a\u6301\u4e45\u5316\u7684\u6570\u636e\u3002<\/p>\n<p>\u5f53\u7cfb\u7edf\u5f00\u542f\u4e86 journal \u529f\u80fd\uff0c\u7cfb\u7edf\u4f1a\u518d\u6620\u5c04\u4e00\u5757\u5185\u5b58\u533a\u57df\u4f9b journal \u4f7f\u7528\uff0c\u79f0\u4e4b\u4e3a private view\uff0cMongoDB \u9ed8\u8ba4\u6bcf100ms\u5237\u65b0 privateView \u5230 journal\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u65ad\u7535\u6216\u5b95\u673a\uff0c\u6709\u53ef\u80fd\u4e22\u5931\u8fd9100ms\u6570\u636e\uff0c\u4e00\u822c\u90fd\u662f\u53ef\u4ee5\u5fcd\u53d7\u7684\uff0c\u5982\u679c\u4e0d\u80fd\u5fcd\u53d7\uff0c\u90a3\u5c31\u7528\u7a0b\u5e8f\u5199log\u5427\uff08\u4f46\u5f00\u542fjournal\u540e\u4f7f\u7528\u7684\u865a\u62df\u5185\u5b58\u662f\u4e4b\u524d\u7684\u4e24\u500d\uff09\u3002<\/p>\n<p>1.4 CAP\u7c7b\u522b<\/p>\n<p>MongoDB \u6bd4\u8f83\u7075\u6d3b\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u6210 strong consistent \uff08CP\u7c7b\u578b\uff09\u6216\u8005 eventual consistent\uff08AP\u7c7b\u578b\uff09\u3002<\/p>\n<p>\u4f46\u5176\u9ed8\u8ba4\u662f CP \u7c7b\u578b\u3002<\/p>\n<p><strong>2. Node\u4e0b\u7684\u4f7f\u7528<\/strong><\/p>\n<p>MongoDB \u5728 node \u73af\u5883\u4e0b\u7684\u9a71\u52a8\u5f15\u64ce\u662f node-mongodb-native \uff0c\u4f5c\u4e3a\u4f9d\u8d56\u5c01\u88c5\u5230 mongodb \u5305\u91cc\uff0c\u6211\u4eec\u76f4\u63a5\u5b89\u88c5\u5373\u53ef\uff1a<\/p>\n<blockquote><p><span class=\"\">npm install <\/span><span class=\"\">mongodb<\/span><\/p><\/blockquote>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">var<\/span> <span class=\"\">mongodb<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;mongodb&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">var<\/span> <span class=\"\">mongodbServer<\/span><span class=\"\"> = <\/span><span class=\"\">new<\/span> <span class=\"\">mongodb<\/span><span class=\"\">.<\/span><span class=\"\">Server<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;localhost&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">27017<\/span><span class=\"\">,<\/span> <span class=\"\">{<\/span> <span class=\"\">auto_reconnect<\/span><span class=\"\">: <\/span><span class=\"\">true<\/span><span class=\"\">,<\/span> <span class=\"\">poolSize<\/span><span class=\"\">: <\/span><span class=\"\">10<\/span> <span class=\"\">});<\/span><\/p>\n<p><span class=\"\">var<\/span> <span class=\"\">db<\/span><span class=\"\"> = <\/span><span class=\"\">new<\/span> <span class=\"\">mongodb<\/span><span class=\"\">.<\/span><span class=\"\">Db<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;mydb&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">mongodbServer<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\/* open db *\/<\/p>\n<p><span class=\"\">db<\/span><span class=\"\">.<\/span><span class=\"\">open<\/span><span class=\"\">(<\/span><span class=\"\">function<\/span><span class=\"\">()<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/* Select &#8216;contact&#8217; collection *\/<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">db<\/span><span class=\"\">.<\/span><span class=\"\">collection<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;contact&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">collection<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/* Insert a data *\/<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">collection<\/span><span class=\"\">.<\/span><span class=\"\">insert<\/span><span class=\"\">({<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">name<\/span><span class=\"\">: <\/span><span class=\"\">&#8216;Fred Chien&#8217;<\/span><span class=\"\">,<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">email<\/span><span class=\"\">: <\/span><span class=\"\">&#8216;cfsghost@gmail.com&#8217;<\/span><span class=\"\">,<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">tel<\/span><span class=\"\">: <\/span><span class=\"\">[<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">&#8216;0926xxx5xx&#8217;<\/span><span class=\"\">,<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">&#8216;0912xx11xx&#8217;<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">]<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">},<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">data<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">data<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Successfully Insert&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span> <span class=\"\">else<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Failed to Insert&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/* Querying *\/<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">collection<\/span><span class=\"\">.<\/span><span class=\"\">find<\/span><span class=\"\">({<\/span> <span class=\"\">name<\/span><span class=\"\">: <\/span><span class=\"\">&#8216;Fred Chien&#8217;<\/span> <span class=\"\">},<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">data<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/* Found this People *\/<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">data<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Name: &#8216;<\/span><span class=\"\"> + <\/span><span class=\"\">data<\/span><span class=\"\">.<\/span><span class=\"\">name<\/span><span class=\"\"> + <\/span><span class=\"\">&#8216;, email: &#8216;<\/span><span class=\"\"> + <\/span><span class=\"\">data<\/span><span class=\"\">.<\/span><span class=\"\">email<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span> <span class=\"\">else<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Cannot found&#8217;<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p>});<\/p><\/blockquote>\n<p>\u53e6\u5916\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528MongoDB\u7684ODM\uff08\u9762\u5411\u5bf9\u8c61\u6570\u636e\u5e93\u7ba1\u7406\u5668\uff09\u00a0\u2014\u2014\u00a0mongoose\u00a0\u6765\u505a\u6570\u636e\u5e93\u7ba1\u7406\uff0c\u5177\u4f53\u53c2\u7167\u5176API\u6587\u6863\u3002<\/p>\n<p><strong>3. \u4f18\u7f3a\u70b9<\/strong><\/p>\n<p>\u4f18\u52bf<\/p>\n<p>1. \u5f3a\u5927\u7684\u81ea\u52a8\u5316 shading \u529f\u80fd\uff1b<\/p>\n<p>2. \u5168\u7d22\u5f15\u652f\u6301\uff0c\u67e5\u8be2\u975e\u5e38\u9ad8\u6548\uff1b<\/p>\n<p>3.\u00a0\u9762\u5411\u6587\u6863\uff08BSON\uff09\u5b58\u50a8\uff0c\u6570\u636e\u6a21\u5f0f\u7b80\u5355\u800c\u5f3a\u5927\u3002<\/p>\n<p>4. \u652f\u6301\u52a8\u6001\u67e5\u8be2\uff0c\u67e5\u8be2\u6307\u4ee4\u4e5f\u4f7f\u7528JSON\u5f62\u5f0f\u7684\u6807\u8bb0\uff0c\u53ef\u8f7b\u6613\u67e5\u8be2\u6587\u6863\u4e2d\u5185\u5d4c\u7684\u5bf9\u8c61\u53ca\u6570\u7ec4\u3002<\/p>\n<p>5.\u00a0\u652f\u6301 javascript \u8868\u8fbe\u5f0f\u67e5\u8be2\uff0c\u53ef\u5728\u670d\u52a1\u5668\u7aef\u6267\u884c\u4efb\u610f\u7684 javascript\u51fd\u6570\u3002<\/p>\n<p>\u7f3a\u70b9<\/p>\n<p>1.\u00a0\u5355\u4e2a\u6587\u6863\u5927\u5c0f\u9650\u5236\u4e3a16M\uff0c32\u4f4d\u7cfb\u7edf\u4e0a\uff0c\u4e0d\u652f\u6301\u5927\u4e8e2.5G\u7684\u6570\u636e\uff1b<\/p>\n<p>2.\u00a0\u5bf9\u5185\u5b58\u8981\u6c42\u6bd4\u8f83\u5927\uff0c\u81f3\u5c11\u8981\u4fdd\u8bc1\u70ed\u6570\u636e\uff08\u7d22\u5f15\uff0c\u6570\u636e\u53ca\u7cfb\u7edf\u5176\u5b83\u5f00\u9500\uff09\u90fd\u80fd\u88c5\u8fdb\u5185\u5b58\uff1b<\/p>\n<p>3. \u975e\u4e8b\u52a1\u673a\u5236\uff0c\u65e0\u6cd5\u4fdd\u8bc1\u4e8b\u4ef6\u7684\u539f\u5b50\u6027\u3002<br \/>\n\u9002\u7528\u573a\u666f<\/p>\n<p>1. \u9002\u7528\u4e8e\u5b9e\u65f6\u7684\u63d2\u5165\u3001\u66f4\u65b0\u4e0e\u67e5\u8be2\u7684\u9700\u6c42\uff0c\u5e76\u5177\u5907\u5e94\u7528\u7a0b\u5e8f\u5b9e\u65f6\u6570\u636e\u5b58\u50a8\u6240\u9700\u7684\u590d\u5236\u53ca\u9ad8\u5ea6\u4f38\u7f29\u6027\uff1b<\/p>\n<p>2. 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Couchbase\u3002<\/p>\n<p>Couchbase\u00a0\u53ef\u4ee5\u8bf4\u662f\u96c6\u5408\u4f17\u5bb6\u4e4b\u957f\uff0c\u76ee\u524d\u5e94\u8be5\u662f\u6700\u5148\u8fdb\u7684Cache\u7cfb\u7edf\uff0c\u5176\u5f00\u53d1\u8bed\u8a00\u662f\u00a0C\/C++\u3002<\/p>\n<p>Couchbase Server \u662f\u4e2a\u9762\u5411\u6587\u6863\u7684\u6570\u636e\u5e93\uff08\u5176\u6240\u7528\u7684\u6280\u672f\u6765\u81ea\u4e8eApache CouchDB\u9879\u76ee\uff09\uff0c\u80fd\u591f\u5b9e\u73b0\u6c34\u5e73\u4f38\u7f29\uff0c\u5e76\u4e14\u5bf9\u4e8e\u6570\u636e\u7684\u8bfb\u5199\u6765\u8bf4\u90fd\u80fd\u63d0\u4f9b\u4f4e\u5ef6\u8fdf\u7684\u8bbf\u95ee\uff08\u8fd9\u8981\u5f52\u529f\u4e8eMembase\u6280\u672f\uff09\u3002<\/p>\n<p><strong>1.\u7279\u70b9<\/strong><\/p>\n<p>1.1 \u6570\u636e\u683c\u5f0f<\/p>\n<p>Couchbase \u8ddf MongoDB \u4e00\u6837\u90fd\u662f\u9762\u5411\u6587\u6863\u7684\u6570\u636e\u5e93\uff0c\u4e0d\u8fc7\u5728\u5f80 Couchbase \u63d2\u5165\u6570\u636e\u524d\uff0c\u9700\u8981\u5148\u5efa\u7acb\u00a0bucket \u2014\u2014 \u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u4e3a\u201c\u5e93\u201d\u6216\u201c\u8868\u201d\u3002<\/p>\n<p>\u56e0\u4e3a Couchbase \u6570\u636e\u57fa\u4e8e Bucket\u00a0\u800c\u5bfc\u81f4\u7f3a\u4e4f\u8868\u7ed3\u6784\u7684\u903b\u8f91\uff0c\u6545\u5982\u679c\u9700\u8981\u67e5\u8be2\u6570\u636e\uff0c\u5f97\u5148\u5efa\u7acb view\uff08\u8ddfRDBMS\u7684\u89c6\u56fe\u4e0d\u540c\uff0cview\u662f\u5c06\u6570\u636e\u8f6c\u6362\u4e3a\u7279\u5b9a\u683c\u5f0f\u7ed3\u6784\u7684\u6570\u636e\u5f62\u5f0f\u5982JSON\uff09\u6765\u6267\u884c\u3002<\/p>\n<p>Bucket\u7684\u610f\u4e49 \u2014\u2014 \u5728\u4e8e\u5c06\u6570\u636e\u8fdb\u884c\u5206\u9694\uff0c\u6bd4\u5982\uff1a\u4efb\u4f55 view \u5c31\u662f\u57fa\u4e8e\u4e00\u4e2a Bucket\u00a0\u7684\uff0c\u4ec5\u5bf9 Bucket\u00a0\u5185\u7684\u6570\u636e\u8fdb\u884c\u5904\u7406\u3002\u4e00\u4e2aserver\u4e0a\u53ef\u4ee5\u6709\u591a\u4e2aBucket\uff0c\u6bcf\u4e2aBucket\u7684\u5b58\u50a8\u7c7b\u578b\u3001\u5185\u5bb9\u5360\u7528\u3001\u6570\u636e\u590d\u5236\u6570\u91cf\u7b49\uff0c\u90fd\u9700\u8981\u5206\u522b\u6307\u5b9a\u3002\u4ece\u8fd9\u4e2a\u610f\u4e49\u4e0a\u770b\uff0c\u6bcf\u4e2aBucket\u90fd\u76f8\u5f53\u4e8e\u4e00\u4e2a\u72ec\u7acb\u7684\u5b9e\u4f8b\u3002\u5728\u96c6\u7fa4\u72b6\u6001\u4e0b\uff0c\u6211\u4eec\u9700\u8981\u5bf9server\u8fdb\u884c\u96c6\u7fa4\u8bbe\u7f6e\uff0cBucket\u53ea\u4fa7\u91cd\u6570\u636e\u7684\u4fdd\u7ba1\u3002<\/p>\n<p>\u6bcf\u5f53views\u5efa\u7acb\u65f6\uff0c \u5c31\u4f1a\u5efa\u7acbindexes\uff0c index\u7684\u66f4\u65b0\u548c\u4ee5\u5f80\u7684\u6570\u636e\u5e93\u7d22\u5f15\u66f4\u65b0\u533a\u522b\u5f88\u5927\u3002 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\u7684\u7cbe\u9ad3\u5c31\u5728\u4e8e\u4f9d\u8d56\u5185\u5b58\u6700\u5927\u5316\u964d\u4f4e\u786c\u76d8I\/O\u5bf9\u541e\u5410\u91cf\u7684\u8d1f\u9762\u5f71\u54cd\uff0c\u6240\u4ee5\u5176\u8bfb\u5199\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u53ef\u4ee5\u8fbe\u5230\u4e9a\u6beb\u79d2\u7ea7\u7684\u54cd\u5e94\u3002<\/p>\n<p>couchbase\u5728\u5bf9\u6570\u636e\u8fdb\u884c\u589e\u5220\u65f6\u4f1a\u5148\u4f53\u73b0\u5728\u5185\u5b58\u4e2d\uff0c\u800c\u4e0d\u4f1a\u7acb\u523b\u4f53\u73b0\u5728\u786c\u76d8\u4e0a\uff0c\u4ece\u5185\u5b58\u7684\u4fee\u6539\u5230\u786c\u76d8\u7684\u4fee\u6539\u8fd9\u4e00\u6b65\u9aa4\u662f\u7531 couchbase \u81ea\u52a8\u5b8c\u6210\uff0c\u7b49\u5f85\u6267\u884c\u7684\u786c\u76d8\u64cd\u4f5c\u4f1a\u4ee5write queue\u7684\u5f62\u5f0f\u6392\u961f\u7b49\u5f85\u6267\u884c\uff0c\u4e5f\u6b63\u662f\u901a\u8fc7\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u786c\u76d8\u7684I\/O\u6548\u7387\u5728 write queue \u6ee1\u4e4b\u524d\u662f\u4e0d\u4f1a\u5f71\u54cd couchbase \u7684\u541e\u5410\u6548\u7387\u7684\u3002<\/p>\n<p>\u9274\u4e8e\u5185\u5b58\u8d44\u6e90\u80af\u5b9a\u8fdc\u8fdc\u5c11\u4e8e\u786c\u76d8\u8d44\u6e90\uff0c\u6240\u4ee5\u5982\u679c\u6570\u636e\u91cf\u5c0f\uff0c\u90a3\u4e48\u5168\u90e8\u6570\u636e\u90fd\u653e\u5728\u5185\u5b58\u4e0a\u81ea\u7136\u662f\u6700\u4f18\u9009\u62e9\uff0c\u8fd9\u65f6\u5019couchbase\u7684\u6548\u7387\u4e5f\u662f\u5f02\u5e38\u9ad8\u3002<\/p>\n<p>\u4f46\u662f\u6570\u636e\u91cf\u5927\u7684\u65f6\u5019\u8fc7\u591a\u7684\u6570\u636e\u5c31\u4f1a\u88ab\u653e\u5728\u786c\u76d8\u4e4b\u4e2d\u3002\u5f53\u7136\uff0c\u6700\u7ec8\u6240\u6709\u6570\u636e\u90fd\u4f1a\u5199\u5165\u786c\u76d8\uff0c\u4e0d\u8fc7\u6709\u4e9b\u9891\u7e41\u4f7f\u7528\u7684\u6570\u636e\u63d0\u524d\u653e\u5728\u5185\u5b58\u4e2d\u81ea\u7136\u4f1a\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<p>1.3 \u6301\u4e45\u5316<\/p>\n<p>\u5176\u524d\u8eab\u4e4b\u4e00 memcached \u662f\u5b8c\u5168\u4e0d\u652f\u6301\u6301\u4e45\u5316\u7684\uff0c\u800c Couchbase \u6dfb\u52a0\u4e86\u5bf9\u5f02\u6b65\u6301\u4e45\u5316\u7684\u652f\u6301\uff1a<\/p>\n<p>Couchbase\u63d0\u4f9b\u4e24\u79cd\u6838\u5fc3\u7c7b\u578b\u7684buckets \u2014\u2014 Couchbase \u7c7b\u578b\u548c Memcached \u7c7b\u578b\u3002\u5176\u4e2d Couchbase \u7c7b\u578b\u63d0\u4f9b\u4e86\u9ad8\u53ef\u7528\u548c\u52a8\u6001\u91cd\u914d\u7f6e\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5b58\u50a8\uff0c\u63d0\u4f9b\u6301\u4e45\u5316\u5b58\u50a8\u548c\u590d\u5236\u670d\u52a1\u3002<\/p>\n<p>Couchbase bucket \u5177\u6709\u6301\u4e45\u6027 \u2014\u2014 \u6570\u636e\u5355\u5143\u5f02\u6b65\u4ece\u5185\u5b58\u5199\u5f80\u78c1\u76d8\uff0c\u9632\u8303\u670d\u52a1\u91cd\u542f\u6216\u8f83\u5c0f\u7684\u6545\u969c\u53d1\u751f\u65f6\u6570\u636e\u4e22\u5931\u3002\u6301\u4e45\u6027\u5c5e\u6027\u662f\u5728 bucket \u7ea7\u8bbe\u7f6e\u7684\u3002<\/p>\n<p>1.4 CAP\u7c7b\u578b<\/p>\n<p>Couchbase \u7fa4\u96c6\u6240\u6709\u70b9\u90fd\u662f\u5bf9\u7b49\u7684\uff0c\u53ea\u662f\u5728\u521b\u5efa\u7fa4\u6216\u8005\u52a0\u5165\u96c6\u7fa4\u65f6\u9700\u8981\u6307\u5b9a\u4e00\u4e2a\u4e3b\u8282\u70b9\uff0c\u4e00\u65e6\u7ed3\u70b9\u6210\u529f\u52a0\u5165\u96c6\u7fa4\uff0c\u6240\u6709\u7684\u7ed3\u70b9\u5bf9\u7b49\u3002<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtB66SeFxy2MHE4JJgthtKBW5UDdJbPHwWz5ibUeEKmj8wpB4K525fIjA\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtB66SeFxy2MHE4JJgthtKBW5UDdJbPHwWz5ibUeEKmj8wpB4K525fIjA\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"1.2189473684210526\" data-w=\"475\" \/><\/p>\n<p>\u5bf9\u7b49\u7f51\u7684\u4f18\u70b9\u662f\uff0c\u96c6\u7fa4\u4e2d\u7684\u4efb\u4f55\u8282\u70b9\u5931\u6548\uff0c\u96c6\u7fa4\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u5b8c\u5168\u4e0d\u4f1a\u4e2d\u65ad\uff0c\u53ea\u662f\u96c6\u7fa4\u7684\u5bb9\u91cf\u53d7\u5f71\u54cd\u3002<\/p>\n<p>\u7531\u4e8e couchbase \u662f\u5bf9\u7b49\u7f51\u96c6\u7fa4\uff0c\u6240\u6709\u7684\u8282\u70b9\u90fd\u53ef\u4ee5\u540c\u65f6\u5bf9\u5ba2\u6237\u7aef\u63d0\u4f9b\u670d\u52a1\uff0c\u8fd9\u5c31\u9700\u8981\u6709\u65b9\u6cd5\u628a\u96c6\u7fa4\u7684\u8282\u70b9\u4fe1\u606f\u66b4\u9732\u7ed9\u5ba2\u6237\u7aef\uff0ccouchbase \u63d0\u4f9b\u4e86\u4e00\u5957\u673a\u5236\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u83b7\u53d6\u6240\u6709\u8282\u70b9\u7684\u72b6\u6001\u4ee5\u53ca\u8282\u70b9\u7684\u53d8\u52a8\uff0c\u7531\u5ba2\u6237\u7aef\u6839\u636e\u96c6\u7fa4\u7684\u5f53\u524d\u72b6\u6001\u8ba1\u7b97 key \u6240\u5728\u7684\u4f4d\u7f6e\u3002<\/p>\n<p>\u5c31\u4e0a\u8ff0\u7684\u4ecb\u7ecd\uff0cCouchbase \u660e\u663e\u5c5e\u4e8e CP \u7c7b\u578b\u3002<\/p>\n<p><strong>2. Node\u4e0b\u7684\u4f7f\u7528<\/strong><\/p>\n<p>Couchbase \u5bf9 Node SDK \u63d0\u4f9b\u4e86\u5b98\u65b9\u6587\u6863\uff1ahttp:\/\/docs.couchbase.com\/couchbase-sdk-node-1.2\/index.html<\/p>\n<p>\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p><span class=\"\">var<\/span> <span class=\"\">couchbase<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8220;couchbase&#8221;<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">var<\/span> <span class=\"\">bucket<\/span><span class=\"\"> = <\/span><span class=\"\">new<\/span> <span class=\"\">couchbase<\/span><span class=\"\">.<\/span><span class=\"\">Connection<\/span><span class=\"\">({<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">&#8216;bucket&#8217;<\/span><span class=\"\">:<\/span><span class=\"\">&#8216;beer-sample&#8217;<\/span><span class=\"\">,<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">&#8216;host&#8217;<\/span><span class=\"\">:<\/span><span class=\"\">&#8216;127.0.0.1:8091&#8217;<\/span><\/p>\n<p><span class=\"\">},<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/\/ Failed to make a connection to the Couchbase cluster.<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">throw<\/span> <span class=\"\">err<\/span><span class=\"\">;<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/ \u83b7\u53d6\u6587\u6863<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">bucket<\/span><span class=\"\">.<\/span><span class=\"\">get<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;aass_brewery-juleol&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">result<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/\/ Failed to retrieve key<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">throw<\/span> <span class=\"\">err<\/span><span class=\"\">;<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">var<\/span> <span class=\"\">doc<\/span><span class=\"\"> = <\/span><span class=\"\">result<\/span><span class=\"\">.<\/span><span class=\"\">value<\/span><span class=\"\">;<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">doc<\/span><span class=\"\">.<\/span><span class=\"\">name<\/span><span class=\"\"> + <\/span><span class=\"\">&#8216;, ABV: &#8216;<\/span><span class=\"\"> + <\/span><span class=\"\">doc<\/span><span class=\"\">.<\/span><span class=\"\">abv<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">doc<\/span><span class=\"\">.<\/span><span class=\"\">comment<\/span><span class=\"\"> = <\/span><span class=\"\">&#8220;Random beer from Norway&#8221;<\/span><span class=\"\">;<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">bucket<\/span><span class=\"\">.<\/span><span class=\"\">replace<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;aass_brewery-juleol&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">doc<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span><span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">result<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/\/ Failed to replace key<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">throw<\/span> <span class=\"\">err<\/span><span class=\"\">;<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">result<\/span><span class=\"\">);<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/\/ Success!<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">process<\/span><span class=\"\">.<\/span><span class=\"\">exit<\/span><span class=\"\">(<\/span><span class=\"\">0<\/span><span class=\"\">);<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">});<\/span><\/p>\n<p>});<\/p><\/blockquote>\n<p><strong>3. \u4f18\u7f3a\u70b9<\/strong><\/p>\n<p>\u4f18\u52bf<\/p>\n<p>1.\u00a0\u9ad8\u5e76\u53d1\u6027\uff0c\u9ad8\u7075\u6d3b\u6027\uff0c\u9ad8\u62d3\u5c55\u6027\uff0c\u5bb9\u9519\u6027\u597d\uff1b<\/p>\n<p>2.\u00a0\u4ee5 vBucket \u7684\u6982\u5ff5\u5b9e\u73b0\u66f4\u7406\u60f3\u5316\u7684\u81ea\u52a8\u5206\u7247\u4ee5\u53ca\u52a8\u6001\u6269\u5bb9\uff1b<\/p>\n<p>\u7f3a\u70b9<\/p>\n<p>1.\u00a0Couchbase \u7684\u5b58\u50a8\u65b9\u5f0f\u4e3a Key\/Value\uff0c\u4f46 Value \u7684\u7c7b\u578b\u5f88\u4e3a\u5355\u4e00\uff0c\u4e0d\u652f\u6301\u6570\u7ec4\u3002\u53e6\u5916\u4e5f\u4e0d\u4f1a\u81ea\u52a8\u521b\u5efadoc id\uff0c\u9700\u8981\u4e3a\u6bcf\u4e00\u6587\u6863\u6307\u5b9a\u4e00\u4e2a\u7528\u4e8e\u5b58\u50a8\u7684 Document Indentifer\uff1b<\/p>\n<p>2.\u00a0\u5404\u79cd\u7ec4\u4ef6\u62fc\u63a5\u800c\u6210\uff0c\u90fd\u662fc++\u5b9e\u73b0\uff0c\u5bfc\u81f4\u590d\u6742\u5ea6\u8fc7\u9ad8\uff0c\u9047\u5230\u5947\u602a\u7684\u6027\u80fd\u95ee\u9898\u6392\u67e5\u6bd4\u8f83\u56f0\u96be\uff0c\uff08\u4e2d\u6587\uff09\u6587\u6863\u6bd4\u8f83\u6b20\u7f3a\uff1b<\/p>\n<p>3.\u00a0\u91c7\u7528\u7f13\u5b58\u5168\u90e8key\u7684\u7b56\u7565\uff0c\u9700\u8981\u5927\u91cf\u5185\u5b58\u3002\u8282\u70b9\u5b95\u673a\u65f6 failover \u8fc7\u7a0b\u6709\u4e0d\u53ef\u7528\u65f6\u95f4\uff0c\u5e76\u4e14\u6709\u90e8\u5206\u6570\u636e\u4e22\u5931\u7684\u53ef\u80fd\uff0c\u5728\u9ad8\u8d1f\u8f7d\u7cfb\u7edf\u4e0a\u6709\u5047\u6b7b\u73b0\u8c61\uff1b<\/p>\n<p>4.\u00a0\u9010\u6e10\u503e\u5411\u4e8e\u95ed\u6e90\uff0c\u793e\u533a\u7248\u672c\uff08\u514d\u8d39\uff0c\u4f46\u4e0d\u63d0\u4f9b\u5b98\u65b9\u7ef4\u62a4\u5347\u7ea7\uff09\u548c\u5546\u4e1a\u7248\u672c\u4e4b\u95f4\u5dee\u8ddd\u6bd4\u8f83\u5927\u3002<\/p>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<p>1. \u9002\u5408\u5bf9\u8bfb\u5199\u901f\u5ea6\u8981\u6c42\u8f83\u9ad8\uff0c\u4f46\u670d\u52a1\u5668\u8d1f\u8377\u548c\u5185\u5b58\u82b1\u9500\u53ef\u9047\u89c1\u7684\u9700\u6c42\uff1b<\/p>\n<p>2. \u9700\u8981\u652f\u6301 memcached \u534f\u8bae\u7684\u9700\u6c42\u3002<\/p>\n<p><strong>LevelDB\u00a0<\/strong><\/p>\n<p>LevelDB \u662f\u7531\u8c37\u6b4c\u91cd\u91cf\u7ea7\u5de5\u7a0b\u5e08\uff08Jeff Dean \u548c Sanjay Ghemawat\uff09\u5f00\u53d1\u7684\u5f00\u6e90\u9879\u76ee\uff0c\u5b83\u662f\u80fd\u5904\u7406\u5341\u4ebf\u7ea7\u522b\u89c4\u6a21 key-value \u578b\u6570\u636e\u6301\u4e45\u6027\u5b58\u50a8\u7684\u7a0b\u5e8f\u5e93\uff0c\u5f00\u53d1\u8bed\u8a00\u662fC++\u3002<\/p>\n<p>\u9664\u4e86\u6301\u4e45\u6027\u5b58\u50a8\uff0cLevelDB \u8fd8\u6709\u4e00\u4e2a\u7279\u70b9\u662f \u2014\u2014 \u5199\u6027\u80fd\u8fdc\u9ad8\u4e8e\u8bfb\u6027\u80fd\uff08\u5f53\u7136\u8bfb\u6027\u80fd\u4e5f\u4e0d\u5dee\uff09\u3002<\/p>\n<p><strong>1.\u7279\u70b9<\/strong><\/p>\n<p>LevelDB \u4f5c\u4e3a\u5b58\u50a8\u7cfb\u7edf\uff0c\u6570\u636e\u8bb0\u5f55\u7684\u5b58\u50a8\u4ecb\u8d28\u5305\u62ec\u5185\u5b58\u4ee5\u53ca\u78c1\u76d8\u6587\u4ef6\uff0c\u5f53LevelDB\u8fd0\u884c\u4e86\u4e00\u6bb5\u65f6\u95f4\uff0c\u6b64\u65f6\u6211\u4eec\u7ed9LevelDb\u8fdb\u884c\u900f\u89c6\u62cd\u7167\uff0c\u90a3\u4e48\u60a8\u4f1a\u770b\u5230\u5982\u4e0b\u4e00\u756a\u666f\u8c61\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtUGxtqqa6krwp5akvoSb0x2WvpR39ictQMB2ed0hMW9ZhqGoAOrpTknA\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtUGxtqqa6krwp5akvoSb0x2WvpR39ictQMB2ed0hMW9ZhqGoAOrpTknA\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.9298561151079137\" data-w=\"\" \/><\/p>\n<p>LevelDB \u6240\u5199\u5165\u7684\u6570\u636e\u4f1a\u5148\u63d2\u5165\u5230\u5185\u5b58\u7684 Mem Table \u4e2d\uff0c\u518d\u7531 Mem Table \u5408\u5e76\u5230\u53ea\u8bfb\u4e14\u952e\u503c\u6709\u5e8f\u7684 Disk Table\uff08SSTable\uff09\u00a0\u4e2d\uff0c\u518d\u7531\u540e\u53f0\u7ebf\u7a0b\u4e0d\u65f6\u7684\u5bf9 Disk Table \u8fdb\u884c\u5f52\u5e76\u3002<\/p>\n<p>\u5185\u5b58\u4e2d\u5b58\u5728\u4e24\u4e2a Mem Table \u2014\u2014 \u4e00\u4e2a\u662f\u53ef\u4ee5\u5f80\u91cc\u9762\u5199\u6570\u636e\u7684table A\uff0c\u53e6\u4e00\u4e2a\u662f\u6b63\u5728\u5408\u5e76\u5230\u786c\u76d8\u7684 table B\u3002<\/p>\n<p>Mem Table \u7528\u00a0skiplist\u00a0\u5b9e\u73b0\uff0c\u5199\u6570\u636e\u65f6\uff0c\u5148\u5199\u65e5\u5fd7\uff08.log\uff09\uff0c\u518d\u5f80A\u63d2\u5165\uff0c\u56e0\u4e3a\u4e00\u6b21\u5199\u5165\u64cd\u4f5c\u53ea\u6d89\u53ca\u4e00\u6b21\u78c1\u76d8\u987a\u5e8f\u5199\u548c\u4e00\u6b21\u5185\u5b58\u5199\u5165\uff0c\u6240\u4ee5\u8fd9\u662f\u4e3a\u4f55\u8bf4LevelDb\u5199\u5165\u901f\u5ea6\u6781\u5feb\u7684\u4e3b\u8981\u539f\u56e0\u3002\u5982\u679c\u5f53B\u8fd8\u6ca1\u5b8c\u6210\u5408\u5e76\uff0c\u800cA\u5df2\u7ecf\u5199\u6ee1\u65f6\uff0c\u5199\u64cd\u4f5c\u5fc5\u987b\u7b49\u5f85\u3002<\/p>\n<p>DiskTable\uff08SSTable\uff0c\u683c\u5f0f\u4e3a.sst\uff09\u662f\u5206\u5c42\u7684\uff08leveldb\u7684\u540d\u79f0\u8d77\u6e90\uff09\uff0c\u6bcf\u4e00\u4e2a\u5927\u5c0f\u4e0d\u8d85\u8fc72M\u3002\u6700\u5148 dump \u5230\u786c\u76d8\u7684 SSTable\u00a0\u7684\u5c42\u7ea7\u4e3a0\uff0c\u5c42\u7ea7\u4e3a0\u7684 SSTable\u00a0\u7684\u952e\u503c\u8303\u56f4\u53ef\u80fd\u6709\u91cd\u53e0\u3002\u5982\u679c\u8fd9\u6837\u7684 SSTable\u00a0\u592a\u591a\uff0c\u90a3\u4e48\u6bcf\u6b21\u90fd\u9700\u8981\u4ece\u591a\u4e2a SSTable\u00a0\u8bfb\u53d6\u6570\u636e\uff0c\u6240\u4ee5LevelDB \u4f1a\u5728\u9002\u5f53\u7684\u65f6\u5019\u5bf9 SSTable\u00a0\u8fdb\u884c Compaction\uff0c\u4f7f\u5f97\u65b0\u751f\u6210\u7684 SSTable\u00a0\u7684\u952e\u503c\u8303\u56f4\u4e92\u4e0d\u91cd\u53e0\u3002<\/p>\n<p>\u8fdb\u884c\u5bf9\u5c42\u7ea7\u4e3a level \u7684 SSTable\u00a0\u505a Compaction \u7684\u65f6\u5019\uff0c\u53d6\u51fa\u5c42\u7ea7\u4e3a level+1 \u7684\u4e14\u952e\u503c\u7a7a\u95f4\u4e0e\u4e4b\u91cd\u53e0\u7684 Table\uff0c\u4ee5\u987a\u5e8f\u626b\u63cf\u7684\u65b9\u5f0f\u8fdb\u884c\u5408\u5e76\u3002level \u4e3a0\u7684 SSTable\u00a0\u505a Compaction \u6709\u4e9b\u7279\u6b8a\uff1a\u4f1a\u53d6\u51fa level 0 \u6240\u6709\u91cd\u53e0\u7684Table\u4e0e\u4e0b\u4e00\u5c42\u505a Compaction\uff0c\u8fd9\u6837\u505a\u4fdd\u8bc1\u4e86\u5bf9\u4e8e\u5927\u4e8e0\u7684\u5c42\u7ea7\uff0c\u6bcf\u4e00\u5c42\u91cc SSTable\u00a0\u7684\u952e\u503c\u7a7a\u95f4\u662f\u4e92\u4e0d\u91cd\u53e0\u7684\u3002<\/p>\n<p>SSTable \u4e2d\u7684\u67d0\u4e2a\u6587\u4ef6\u5c5e\u4e8e\u7279\u5b9a\u5c42\u7ea7\uff0c\u800c\u4e14\u5176\u5b58\u50a8\u7684\u8bb0\u5f55\u662f key \u6709\u5e8f\u7684\uff0c\u90a3\u4e48\u5fc5\u7136\u6709\u6587\u4ef6\u4e2d\u7684\u6700\u5c0f key \u548c\u6700\u5927 key\uff0c\u8fd9\u662f\u975e\u5e38\u91cd\u8981\u7684\u4fe1\u606f\uff0cLevelDB \u5e94\u8be5\u8bb0\u4e0b\u8fd9\u4e9b\u4fe1\u606f \u2014\u2014 Manifest \u5c31\u662f\u5e72\u8fd9\u4e2a\u7684\uff0c\u5b83\u8bb0\u8f7d\u4e86 SSTable \u5404\u4e2a\u6587\u4ef6\u7684\u7ba1\u7406\u4fe1\u606f\uff0c\u6bd4\u5982\u5c5e\u4e8e\u54ea\u4e2aLevel\uff0c\u6587\u4ef6\u540d\u79f0\u53eb\u5565\uff0c\u6700\u5c0f key \u548c\u6700\u5927 key \u5404\u81ea\u662f\u591a\u5c11\u3002\u4e0b\u56fe\u662f Manifest \u6240\u5b58\u50a8\u5185\u5bb9\u7684\u793a\u610f\uff1a<\/p>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtJBBVo6icy5324YOLDMEGuCN7moMYrneoul0DUJbQBbdWnXrHlm1R8fw\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/DmibiaFiaAI4B1z1aAKSlMUs03l5Dtia6AAtJBBVo6icy5324YOLDMEGuCN7moMYrneoul0DUJbQBbdWnXrHlm1R8fw\/0?wx_fmt=png\" data-type=\"png\" data-ratio=\"0.35431654676258995\" data-w=\"\" \/><\/p>\n<p>\u56fe\u4e2d\u53ea\u663e\u793a\u4e86\u4e24\u4e2a\u6587\u4ef6\uff08Manifest \u4f1a\u8bb0\u8f7d\u6240\u6709 SSTable \u6587\u4ef6\u7684\u8fd9\u4e9b\u4fe1\u606f\uff09\uff0c\u5373 Level0 \u7684 Test1.sst \u548c Test2.sst \u6587\u4ef6\uff0c\u540c\u65f6\u8bb0\u8f7d\u4e86\u8fd9\u4e9b\u6587\u4ef6\u5404\u81ea\u5bf9\u5e94\u7684 key \u8303\u56f4\uff0c\u6bd4\u5982 Test1.sstt \u7684 key \u8303\u56f4\u662f\u201can\u201d\u5230 \u201cbanana\u201d\uff0c\u800c\u6587\u4ef6 Test2.sst \u7684 key \u8303\u56f4\u662f\u201cbaby\u201d\u5230\u201csamecity\u201d\uff0c\u53ef\u4ee5\u770b\u51fa\u4e24\u8005\u7684 key \u8303\u56f4\u662f\u6709\u91cd\u53e0\u7684\u3002<\/p>\n<p>\u90a3\u4e48\u4e0a\u65b9\u56fe1\u4e2d\u7684 Current \u6587\u4ef6\u662f\u5e72\u4ec0\u4e48\u7684\u5462\uff1f\u8fd9\u4e2a\u6587\u4ef6\u7684\u5185\u5bb9\u53ea\u6709\u4e00\u4e2a\u4fe1\u606f\uff0c\u5c31\u662f\u8bb0\u8f7d\u5f53\u524d\u7684 Manifest \u6587\u4ef6\u540d\u3002\u56e0\u4e3a\u5728 LevleDB \u7684\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u968f\u7740 Compaction \u7684\u8fdb\u884c\uff0cSSTable \u6587\u4ef6\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u4f1a\u6709\u65b0\u7684\u6587\u4ef6\u4ea7\u751f\uff0c\u8001\u7684\u6587\u4ef6\u88ab\u5e9f\u5f03\uff0cManifest \u4e5f\u4f1a\u8ddf\u7740\u53cd\u6620\u8fd9\u79cd\u53d8\u5316\uff0c\u6b64\u65f6\u5f80\u5f80\u4f1a\u65b0\u751f\u6210 Manifest \u6587\u4ef6\u6765\u8bb0\u8f7d\u8fd9\u79cd\u53d8\u5316\uff0c\u800c Current \u5219\u7528\u6765\u6307\u51fa\u54ea\u4e2a Manifest \u6587\u4ef6\u624d\u662f\u6211\u4eec\u5173\u5fc3\u7684\u90a3\u4e2a Manifest \u6587\u4ef6\u3002<\/p>\n<p>\u6ce8\u610f\uff0c\u9274\u4e8e LevelDB \u4e0d\u5c5e\u4e8e\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff0c\u6545CAP\u6cd5\u5219\u5728\u6b64\u5904\u4e0d\u9002\u7528\u3002<\/p>\n<p><strong>2. Node\u4e0b\u7684\u4f7f\u7528<\/strong><\/p>\n<p>Node \u4e0b\u53ef\u4ee5\u4f7f\u7528\u00a0LevelUP\u00a0\u6765\u64cd\u4f5c LevelDB \u6570\u636e\u5e93\uff1a<\/p>\n<blockquote><p><span class=\"\">var<\/span> <span class=\"\">levelup<\/span><span class=\"\"> = <\/span><span class=\"\">require<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;levelup&#8217;<\/span><span class=\"\">)<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\/\/ 1) Create our database, supply location and options.<\/p>\n<p>\/\/\u00a0\u00a0\u00a0\u00a0This will create or open the underlying LevelDB store.<\/p>\n<p><span class=\"\">var<\/span> <span class=\"\">db<\/span><span class=\"\"> = <\/span><span class=\"\">levelup<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;.\/mydb&#8217;<\/span><span class=\"\">)<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\/\/ 2) put a key &amp; value<\/p>\n<p><span class=\"\">db<\/span><span class=\"\">.<\/span><span class=\"\">put<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;name&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">&#8216;LevelUP&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">return<\/span> <span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Ooops!&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">\/\/ some kind of I\/O error<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">\/\/ 3) fetch by key<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">db<\/span><span class=\"\">.<\/span><span class=\"\">get<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;name&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">function<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">,<\/span> <span class=\"\">value<\/span><span class=\"\">)<\/span> <span class=\"\">{<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">if<\/span> <span class=\"\">(<\/span><span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">return<\/span> <span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;Ooops!&#8217;<\/span><span class=\"\">,<\/span> <span class=\"\">err<\/span><span class=\"\">)<\/span> <span class=\"\">\/\/ likely the key was not found<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">\/\/ ta da!<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0\u00a0\u00a0<\/span><span class=\"\">console<\/span><span class=\"\">.<\/span><span class=\"\">log<\/span><span class=\"\">(<\/span><span class=\"\">&#8216;name=&#8217;<\/span><span class=\"\"> + <\/span><span class=\"\">value<\/span><span class=\"\">)<\/span><\/p>\n<p><span class=\"\">\u00a0\u00a0<\/span><span class=\"\">})<\/span><\/p>\n<p>})<\/p><\/blockquote>\n<p>LevelUp \u7684API\u975e\u5e38\u7b80\u6d01\u5b9e\u7528\uff0c\u5177\u4f53\u53ef\u53c2\u8003\u5b98\u65b9\u6587\u6863\u3002<\/p>\n<p><strong>3. \u4f18\u7f3a\u70b9<\/strong><\/p>\n<p>\u4f18\u52bf<\/p>\n<p>1. \u64cd\u4f5c\u63a5\u53e3\u7b80\u5355\uff0c\u57fa\u672c\u64cd\u4f5c\u5305\u62ec\u5199\u8bb0\u5f55\uff0c\u8bfb\u8bb0\u5f55\u548c\u5220\u9664\u8bb0\u5f55\uff0c\u4e5f\u652f\u6301\u9488\u5bf9\u591a\u6761\u64cd\u4f5c\u7684\u539f\u5b50\u6279\u91cf\u64cd\u4f5c\uff1b<\/p>\n<p>2. \u5199\u5165\u6027\u80fd\u8fdc\u5f3a\u4e8e\u8bfb\u53d6\u6027\u80fd\uff0c<\/p>\n<p>3. 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