{"id":224906,"date":"2015-05-14T20:36:41","date_gmt":"2015-05-14T12:36:41","guid":{"rendered":"http:\/\/yangzhe1991.org\/blog\/?p=224906"},"modified":"2015-05-31T21:28:35","modified_gmt":"2015-05-31T13:28:35","slug":"using-cassandra-for-one-year","status":"publish","type":"post","link":"https:\/\/yangzhe1991.org\/blog\/2015\/05\/using-cassandra-for-one-year\/","title":{"rendered":"\u79bb\u804c\u7cfb\u5217\u6587\u7ae0\u4e4bCassandra\u4f7f\u7528\u7ecf\u9a8c"},"content":{"rendered":"<p>\u79bb\u804c\u201c\u7cfb\u5217\u6587\u7ae0\u201d\u53ea\u5199\u4e00\u7bc7\u80af\u5b9a\u662f\u4e0d\u5bf9\u7684\u2026\u2026<\/p>\n<p><!--more--><\/p>\n<p><a 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key\u505abloom filter\u7684\u4f18\u5316\u3002\u66fe\u7ecf\u6709\uff0c\u540e\u6765\u5e72\u6389\u4e86\uff0c\u4e0d\u77e5\u9053\u4e3a\u5565\u3002\u800cHBase\u6211\u8bb0\u5f97\u662f\u53ef\u4ee5\u6709\u7684\u3002\u4e8e\u662f\u8fd9\u5c31\u5bfc\u81f4\u5982\u679c\u8bfb\u7279\u5b9a\u67d0\u884c\u6570\u636e\uff0c\u5982\u679ctable\u7684\u5b9a\u4e49\u662f\u6240\u6709primary key\u90fd\u662fpartition key\uff0c\u90a3\u4e48\u53ef\u80fdbloom filter\u8fc7\u6ee4\u5b8c\u53ea\u9700\u8981\u8bfb\u4e00\u4e2aSSTable\uff0c\u4f46\u5982\u679c\u6709column key\uff0c\u800c\u4e14partition key\u4e0b\u9762\u6709\u975e\u5e38\u591a\u884c\u6570\u636e\uff0c\u90a3\u4e48bloom filter\u5bf9column key\u4e0d\u8d77\u4f5c\u7528\uff0c\u8fd9\u4e2apartition key\u4e0b\u9762\u7684\u6570\u636e\u5206\u5e03\u5728\u591a\u4e2aSSTable\u91cc\uff0c\u5c31\u9700\u8981\u8bfb\u6240\u6709\u8fd9\u4e9bSSTable\uff0c\u5f71\u54cd\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5bf9\u8303\u56f4\u67e5\u8be2\u6ca1\u9700\u6c42\uff0c\u90a3\u4e48\u5c31\u5c3d\u91cf\u628a\u6240\u6709\u4e3b\u952e\u90fd\u8bbe\u6210partition key\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8bf4\u5b8c\u5751\u4e86\uff0c\u8bf4\u4e0b\u5728\u6709\u9053\u6298\u817eCassandra\u7684\u4e00\u5e74\u91cc\u7684\u51e0\u4e2a\u9057\u61be\u3002<\/p>\n<p>\u4e00\u4e2a\u662f\u6ca1\u7528\u8fc7secondary index\u3002\u56e0\u4e3aCassandra\u6bd5\u7adf\u662fNoSQL\uff0c\u4ed6\u5bf9\u5217\u5efa\u7d22\u5f15\u8ddfMySQL\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u3002\u6709\u9053\u7684\u540c\u4e8b\u8bd5\u56fe\u7528\u8fd9\u73a9\u610f\u7684\u65f6\u5019\uff0c\u51e0\u4e4e\u90fd\u662f\u56e0\u4e3a\u6ca1\u4ed4\u7ec6\u770bC*\u6587\u6863\u8bef\u628a\u5b83\u5f53MySQL\u7684index\u7528\u3002\u56e0\u4e3a\u9650\u5236\u5927\uff0c\u6240\u4ee5\u4e5f\u6ca1\u5565\u9700\u6c42\u7528\u8fd9\u4e2a\uff0c\u6240\u4ee5\u5bf9\u8fd9\u4e2a\u4e1c\u897f\u5c31\u4e0d\u662f\u5f88\u4e86\u89e3\uff0c\u6ca1\u6cd5\u6df1\u5165\u7684\u7814\u7a76\u4e86\u3002<\/p>\n<p>\u4e00\u4e2a\u662f\u5185\u5b58\u5c0f\uff0c\u6ca1\u600e\u4e48\u8bd5\u8fc7row cache\u3002\u6211\u4e00\u76f4\u8ba4\u4e3a\u5728\u5927\u591a\u6570\u573a\u666f\u4e2d\uff0c\u78c1\u76d8\u6570\u636e\u5e93\u548c\u5185\u5b58\u7f13\u5b58\u662f\u53ef\u4ee5\u5408\u4e8c\u4e3a\u4e00\uff0c\u9760\u6570\u636e\u5e93\u81ea\u8eab\u4fdd\u8bc1\u7f13\u5b58\u4e00\u81f4\u6027\u5e76\u65b9\u4fbf\u5e94\u7528\u5c42\u4f7f\u7528\u7684\u3002\u8fd9\u5e94\u8be5\u662f\u4e0d\u9700\u8981\u8de8\u884c\u4e8b\u52a1\u7684NoSQL\u7684\u53d1\u5c55\u65b9\u5411\u3002\u5408\u5e76\u7684\u601d\u8def\u6709\u4e24\u4e2a\uff0c\u4e00\u4e2a\u662fredis\u8fd9\u7c7b\u5185\u5b58\u6570\u636e\u5e93\u652f\u6301\u6301\u4e45\u5316\uff0c\u4e00\u4e2a\u662fCassandra\u8fd9\u7c7b\u78c1\u76d8\u6570\u636e\u5e93\u5f00\u5185\u5b58\u5f53cache\u3002\u6211\u4e2a\u4eba\u5f88\u96be\u8bf4\u662f\u503e\u5411\u4e8e\u54ea\u4e2a\u65b9\u6848\uff0c\u4f46\u662f\u81f3\u5c11\u7b2c\u4e8c\u79cd\u65b9\u6848\u5df2\u7ecf\u6709\u73b0\u6210\u7684\u4e86\uff0c\u800c\u7b2c\u4e00\u79cd\u65b9\u6848\u597d\u50cf\u8fd8\u6ca1\u5b8c\u5168\u6210\u719f\u3002<\/p>\n<p>\u4e00\u4e2a\u662fCassandra\u56e0\u4e3a\u4efb\u610f\u65f6\u95f4\u6302\u4e00\u4e2a\u8282\u70b9\u90fd\u57fa\u672c\u4e0d\u5f71\u54cd\u6574\u4e2a\u96c6\u7fa4\u7684\u64cd\u4f5c\u3002\u6240\u4ee5\u6211\u4e00\u76f4\u6709\u4e2a\u60f3\u6cd5\u5c31\u662f\u4e3b\u52a8\u7684\u5173\u95ed\u54cd\u5e94\u6765\u505afull gc\uff0c\u6765\u4fdd\u8bc1\u5e73\u65f6\u63a5\u53d7\u8bf7\u6c42\u7684\u65f6\u5019\u5b8c\u5168\u4e0dgc\u3002\u800c\u4e14\u56e0\u4e3aCassandra\u53ef\u4ee5\u901a\u8fc7\u5916\u90e8\u547d\u4ee4\u5f00\u5173\u670d\u52a1\uff0c\u5173\u95ed\u670d\u52a1\u4e5f\u4e0d\u4f1a\u65e0\u8111\u5207\u65ad\u5f53\u524d\u6b63\u5728\u8fdb\u884c\u7684\u8bf7\u6c42\u53ea\u662f\u901a\u77e5\u5176\u4ed6\u8282\u70b9\u4e0d\u8981\u53d1\u65b0\u7684\u4e86\uff0c\u800cJVM\u4e5f\u53ef\u4ee5\u5916\u90e8\u5f3a\u5236GC\uff0c\u6240\u4ee5\u8fd9\u4e1c\u897f\u90fd\u4e0d\u9700\u8981\u6539C*\u4ee3\u7801\u5c31\u53ef\u4ee5\u5f88\u5e73\u7a33\u7684\u641e\u3002\u53ea\u662f\u56e0\u4e3a\u6ca1\u65f6\u95f4\uff0c\u6ca1\u8bd5\u8fc7\u3002\u524d\u51e0\u5929\u770b\u5230\u4e2a\u6587\u7ae0\u662f\u6709\u4e2a\u516c\u53f8\u4e5f\u8fd9\u4e48\u5e72\uff0c\u4f46\u4e0d\u662fCassandra\u800c\u662fWebServer\uff0c\u56e0\u4e3a\u9700\u8981\u901a\u77e5\u4e0a\u5c42HA\u5565\u7684\u6240\u4ee5\u53cd\u800c\u9ebb\u70e6\uff0c\u800cC*\u7684\u6539\u52a8\u91cf\u5e94\u8be5\u5c0f\u5f88\u591a\u3002\u8fd9\u6837\u5bf9\u964d\u4f4e.99\u3001.999\u3001max\u5ef6\u8fdf\u5e94\u8be5\u6709\u4e00\u5b9a\u5e2e\u52a9\u3002\u5f53\u7136\u56e0\u4e3aGC\u7684\u65f6\u5019\u76f8\u5f53\u4e8eW=R=N\uff0c\u53ef\u7528\u6027\u7684\u95ee\u9898\u5012\u662f\u4e0d\u5927\u56e0\u4e3agc\u7684\u65f6\u95f4\u4e0d\u957f\uff0c\u4f46\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\u4e0d\u80fdN\u9009R\u4ece\u800c\u505a\u4f18\u5316\uff0c\u5728\u8fd9\u65b9\u9762\u4f1a\u7565\u5fae\u589e\u52a0\u5ef6\u8fdf\uff0c\u5c31\u770b\u4e24\u8005\u62b5\u6d88\u540e\u7684\u6700\u7ec8\u6548\u679c\u5982\u4f55\u4e86\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7136\u540e\u8bf4\u8bf4Cassandra\u7684\u7248\u672c\u3002\u53bb\u5e74\u641e2.1\u7684\u65f6\u5019\uff0c\u90a3\u5e2e\u5f00\u53d1\u8005\u89c9\u5f97\u8981\u597d\u597d\u6d4b\u8bd5\u624d\u80fd\u53d1\u5e03\uff0c\u4e8e\u662f\u53d1\u4e86\u597d\u51e0\u4e2abeta\u3001\u597d\u51e0\u4e2arc\uff0c\u7136\u540e\u624d\u5f88\u8c28\u614e\u7684\u53d1\u5e032.1.0\u6b63\u5f0f\u7248\u3002\u5f53\u5e74\u7684Cassandra\u5b98\u7f51\u4e0a\uff0c\u4f1a\u63a8\u8350\u4f60\u75282.1.x\u7684latest version\u6765\u4f5c\u4e3a\u65b0\u7528\u6237\u7684\u4f7f\u7528\u7248\u672c\u3002\u800c\u4e14\u56e0\u4e3a2.1\u6539\u8fdb\u4e86\u4e00\u4e9b\u6027\u80fd\u95ee\u9898\uff0c\u5f53\u521d\u4e3a\u4e86\u4f18\u5316\u4e0b\u6027\u80fd\u6211\u5c31\u628a\u96c6\u7fa4\u7ed9\u5347\u52302.1\u4e86\u3002\u4f46\u662f\uff0c<a href=\"http:\/\/mail-archives.apache.org\/mod_mbox\/cassandra-user\/201503.mbox\/%3CCAEDUwd2CwAJMziDQqUu2Ay+3U0GAw9aM5UrhC6uqjx48FSRzuw@mail.gmail.com%3E\">\u5982\u4e00\u4e2a\u90ae\u4ef6\u91cc\u603b\u7ed3\u7684<\/a>\uff0c2.1\u6bcf\u4e2a\u7248\u672c\u90fd\u6709\u5927\u95ee\u9898\u4ee5\u81f3\u4e8e\u5728\u751f\u4ea7\u73af\u5883\u7528\u5f88\u5bb9\u6613\u88ab\u5751\uff08\u90ae\u4ef6\u91cc\u63d0\u5230\u76842.1.4\u540e\u6765\u53d8\u6210\u4e00\u4e2a\u5b89\u5168\u66f4\u65b0\uff0c\u53ea\u6539\u4e86\u4e00\u4e2a\u5b89\u5168\u6f0f\u6d1e\uff0c\u6ca1\u4efb\u4f55patch\uff0c\u6240\u4ee5\u5b9e\u9645\u4e0a\u5e94\u8be5\u662f2.1.5\uff09\u3002\u6211\u81ea\u5df1\u5c31\u9047\u5230\u4e86\u81f3\u5c11\u4e24\u4e2abug\uff0c\u5e76\u4eb2\u81ea\u6539\u4e86\u4e00\u4e2a\uff0c\u5206\u522b\u662f\u5bfc\u81f4assert error\u65e0\u6cd5\u8bfb\u6570\u636e\uff0c\u4ee5\u53ca\u542f\u52a8\u7684\u65f6\u5019\u5185\u5b58\u6cc4\u9732\u628aheap\u5360\u6ee1\u3002\u540e\u6765\u57fa\u4e8e\u73b0\u5728\u6765\u8bf4\u4ecb\u4e8e2.1.3\u548c2.1.5\u4e4b\u95f4\u7684\u4e00\u4e2a2.1\u5206\u652f\u4e0a\u7684\u7248\u672c\u81ea\u5df1\u7f16\u8bd1\u4e86\u4e00\u4e0b\uff0c\u7528\u8fd9\u4e2a\u975e\u6b63\u5f0f\u7248\u672c\u8dd1\uff0c\u81f3\u5c11\u8d70\u4e4b\u524d\u6ca1\u9047\u5230\u5565\u95ee\u9898\u4e86\u3002\u73b0\u57282.1.5\u4e5f\u53d1\u5e03\u4e86\uff0c\u611f\u89c9\u4e0a\u4e5f\u8bb8\u5927\u6982\u53ef\u80fd\uff0c\u7b97\u662f\u751f\u4ea7\u73af\u5883\u53ef\u7528\u4e86\u5427\u3002\u7136\u540e\u6211\u53d1\u73b0\u90a3\u5e2e\u4eba\u5f88\u9e21\u8d3c\uff0c\u4e0d\u77e5\u9053\u5565\u65f6\u5019\u5f00\u59cb\u5df2\u7ecf\u6539\u4e86\u5b98\u7f51\u7684\u63cf\u8ff0\uff0c\u540c\u65f6\u63d0\u4f9b2.0.x\u548c2.1.x\u4fe9\u7248\u672c\uff0c\u4e00\u4e2a\u53eb\u201cmost stable release\u201d\u4e00\u4e2a\u53eb\u201clatest release\u201d\u3002\u4f46\u662f\u6839\u636e\u60ef\u4f8b\uff0c\u7b493.0\u53d1\u5e03\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u6240\u8c13\u7684\u7a33\u5b9a\u7248\u5c31EOL\u4e86\u2026\u2026<\/p>\n<p>\u7136\u540e\u4e0d\u77e5\u9053\u51fa\u4e8e\u5565\u76ee\u7684\uff0cCassandra\u51c6\u5907\u57283.x\u65f6\u4ee3\u6539\u53d8\u76ee\u524d\u7684branch\u7684\u53d1\u884c\u65b9\u5f0f\uff0c\u6539\u6210\u6bcf\u4e2a\u6708\u4e00\u4e2a\u7248\u672c\u7684tick-tock\u6a21\u578b\u3002\u5927\u6982\u5c31\u662f3.0\u7ee7\u7eed\u4fdd\u6301\u65e7\u65b9\u6848\uff0c\u4e0d\u65ad\u76843.0.x\u6765\u66f4\u65b0\u3002\u7136\u540e\u4e0b\u4e2a\u6708\u53d1\u4e00\u4e2a\u63d0\u4f9b\u65b0feature\u76843.1\uff0c\u518d\u4e0b\u4e00\u4e2a\u6708\u65393.1\u7684bug\u53eb3.2\uff0c\u7136\u540e\u518d\u4e0b\u4e00\u4e2a\u6708\u52a0feature\u53eb3.3\uff0c\u7136\u540e\u4e00\u4e2a\u6708\u6539bug\u53eb3.4\u2026\u2026\u8bf4\u767d\u4e86\u5c31\u662f\uff0c\u4f60\u80af\u5b9a\u8981\u7528\u5076\u6570\u7248\u672c\u6765\u7528\u4e8e\u751f\u4ea7\u73af\u5883\uff0c\u6bd4\u59823.2\uff0c\u4f46\u5982\u679c\u8fd9\u4e2a\u7248\u672c\u6709\u95ee\u9898\uff0c\u9664\u975e\u5f88\u7d27\u6025\u503c\u5f97\u53d1\u4e00\u4e2a3.2.1\u5565\u7684\uff0c\u5426\u5219\u57fa\u672c\u4e0a\u5c31\u5f97\u7b49\u4e00\u4e2a\u6708\u53d13.3\u518d\u5347\u7ea7\uff0c\u4f463.3\u56e0\u4e3a\u6709\u65b0feature\uff0c\u6ca1\u51c6\u5c31\u5f15\u5165\u65b0bug\u2026\u2026\u603b\u4e4b\u6211\u662f\u89c9\u5f97\u8fd9\u4e2a\u6a21\u5f0f\u975e\u5e38\u4e0d\u9760\u8c31\u3002\u4e5f\u6ca1\u542c\u8bf4\u54ea\u4e2a\u6570\u636e\u5e93\u662f\u8fd9\u4e48\u73a9\u7684\uff0c\u6570\u636e\u5e93\u7ec8\u7a76\u8fd8\u662f\u4e00\u4e2a\u5148\u8ffd\u6c42\u7a33\u5b9a\u518d\u8ffd\u6c42\u6027\u80fd\u6700\u540e\u8ffd\u6c42\u529f\u80fd\u7684\u4e1c\u897f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6700\u540e\u8bf4\u8bf4HBase\u3002\u5f53\u7136\u6211\u6ca1\u7528\u8fc7HBase\uff0c\u53ea\u7528\u8fc7\u6709\u9053\u5c71\u5be8\u7684HBase\u3002\u8fd9\u91cc\u4e0d\u8003\u8651Master\u3001ZooKeeper\u9700\u8981\u989d\u5916\u8282\u70b9\u7684\u95ee\u9898\u3002\u867d\u7136\u8bf4\u5bf9\u5c0f\u96c6\u7fa4\u5c0f\u516c\u53f8\u6765\u8bf4\u786e\u5b9e\u662f\u4e2a\u95ee\u9898\u3002\u6bd4\u5982\u5bf9\u7528codis\u7684\u4eba\u6765\u8bf4\u5f88\u591a\u4eba\u662f\u7b2c\u4e00\u6b21\u63a5\u89e6zookeeper\uff0c\u5355\u7eaf\u4e3a\u4e86codis\u642d\u4e00\u5957zookeeper\u5176\u5b9e\u4e5f\u786e\u5b9e\u633a\u86cb\u75bc\u7684\u3002<\/p>\n<p>HBase\u6309\u6211\u7684\u7406\u89e3\u662f\u4e0d\u5206\u6563\u8ba1\u7b97\u3001\u53ea\u5206\u6563\u5b58\u50a8\u3002\u6301\u4e45\u5316\u7684\u4e1c\u897f\u548cCassandra\u4e5f\u662f\u5b58N\u4efd\uff0c\u4f46\u8ba1\u7b97\u76f8\u5173\u7684\u90fd\u53ea\u6709\u4e00\u4efd\uff0c\u6bd4\u5982compaction\u53ea\u8d39\u4e00\u4e2a\u673a\u5668\u7684CPU\u3001MemTable\u53ea\u8bfb\u5199\u4e00\u4e2a\u673a\u5668\uff08\u4e0d\u8003\u8651RegionServer\u641eHA\u5565\u7684\uff09\uff0c\u6240\u4ee5\u7406\u8bba\u4e0a\u611f\u89c9HBase\u5bf9\u8d44\u6e90\u7684\u6d88\u8017\u5e94\u8be5\u662f\u5c0f\u4e8eCassandra\u7684\u3002\u867d\u7136\u53ef\u80fd\u4e5f\u8bb8\u5927\u6982\u662f\u56e0\u4e3a\u5e95\u5c42\u7528HDFS\u800c\u975e\u76f4\u63a5\u8bfb\u5199\u78c1\u76d8\uff0c\u603b\u4f53\u6765\u8bf4\u6027\u80fd\u7a0d\u5fae\u6bd4Cassandra\u5dee\u4e00\u70b9\uff0c\u4f46\u611f\u89c9\u5728\u672a\u6765\u8fd8\u662f\u53ef\u4ee5\u9010\u6e10\u4f18\u5316\u7684\uff0c\u66f4\u4f55\u51b5\u5176\u5b9e\u5927\u591a\u6570\u573a\u666f\u4e5f\u4e0d\u4f1a\u69a8\u5e72\u6027\u80fd\u3002\u628a\u6570\u636e\u5e93\u7528\u5230\u6781\u81f4\u7684\u516c\u53f8\u53ef\u80fd\u4f1a\u8003\u8651\u4e24\u8005\u7684\u4f18\u52a3\u6765\u9009\u62e9\uff0c\u751a\u81f3\u4fe9\u4e00\u8d77\u7528\u5206\u522b\u7528\u4f5c\u4e0d\u540c\u7684\u573a\u666f\uff0c\u4f46\u5bf9\u4e8e\u4e2d\u5c0f\u516c\u53f8\u6765\u8bf4\uff0c\u5176\u5b9e\u7528\u5565\u90fd\u4e00\u6837\u2026\u2026<\/p>\n<p>\u7ed3\u5c3e\u63d2\u64ad\u534a\u4e2a\u5e7f\u544a\uff0c\u5982\u679c\u60f3\u6301\u7eed\u5173\u6ce8\u672c\u4eba\u7684\u535a\u5ba2\uff0c\u53c8\u6ca1\u6709\u7528RSS\u9605\u8bfb\u5668\u7684\u4e60\u60ef\uff0c\u53ef\u4ee5\u5173\u6ce8\u4e0b\u9762\u8fd9\u4e2a\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u4f1a\u540c\u6b65\u53d1\u535a\u5ba2\u4e0a\u7684\u6587\u7ae0\u3002<\/p>\n<p><a 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