{"id":10006614,"date":"2022-09-27T19:26:28","date_gmt":"2022-09-27T11:26:28","guid":{"rendered":"https:\/\/ityet.com\/?p=10006614"},"modified":"2022-09-27T19:26:28","modified_gmt":"2022-09-27T11:26:28","slug":"%e5%bc%b9%e6%80%a7%e5%b9%b6%e8%a1%8c%e6%9f%a5%e8%af%a2%e6%b7%b1%e5%ba%a6%e5%89%96%e6%9e%90","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006614","title":{"rendered":"\u5f39\u6027\u5e76\u884c\u67e5\u8be2\u6df1\u5ea6\u5256\u6790"},"content":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u5173\u4e8e\u5e76\u884c\u67e5\u8be2\u7684\u529f\u80fd\u3001\u7279\u6027\u3001\u6280\u672f\u539f\u7406\u7b49\uff0c&#8221;\u5e76\u884c\u67e5\u8be2\u7684\u524d\u4e16\u4eca\u751f&#8221;\u8fd9\u7bc7\u5df2\u505a\u8fc7\u8be6\u7ec6\u7684\u89e3\u8bfb\uff0c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u5219\u4e3b\u8981\u805a\u7126\u4e8e\u5e76\u884c\u67e5\u8be2\u5168\u65b0\u53d1\u5e03\u7684\u4e0b\u4e00\u4ee3\u5f62\u6001\uff1a\u5f39\u6027\u591a\u673a\u5e76\u884c\uff08Elastic Parallel Query\uff09\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552764\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u4f5c\u8005 | \u6881\u8fb0(\u9065\u51cc)\u6765\u6e90 | \u963f\u91cc\u5f00\u53d1\u8005\u516c\u4f17\u53f7\u80cc\u666f\u5e76\u884c\u67e5\u8be2\uff08Parallel Query\uff09\u662f\u81eaPolarDB MySQL\u8bde\u751f\u4f0a\u59cb\u5c31\u81f4\u529b\u4e8e\u7814\u53d1\u7684\u4f01\u4e1a\u7ea7\u67e5\u8be2\u52a0\u901f\u529f\u80fd\uff0c\u8fd9\u4e0ePolarDB\u7684\u4ea7\u54c1\u5b9a\u4f4d\u5bc6\u5207\u76f8\u5173\uff0c\u57fa\u4e8e\u4e91\u539f\u751f\u7684\u8ba1\u7b97\u5b58\u50a8\u5206\u79bb\u4f7f\u5e95\u5c42\u6570\u636e\u91cf\u8fdc\u7a81\u7834\u5355\u673a\u5bb9\u91cf\u7684\u9650\u5236\uff0c\u800c\u9488\u5bf9\u66f4\u6d77\u91cf\u6570\u636e\u7684\u590d\u6742\u5206\u6790\u3001\u62a5\u8868\u7c7b\u4e1a\u52a1\u4e5f\u6210\u4e3a\u7528\u6237\u81ea\u7136\u800c\u7136\u7684\u9700\u6c42\uff0c\u540c\u65f6\u7531\u4e8ePolarDB\u662f\u670d\u52a1\u4e8e\u5728\u7ebf\u4e1a\u52a1\uff08OLTP\uff09\u7684\u5173\u7cfb\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u7528\u6237\u4f1a\u5e0c\u671b\u5206\u6790\u4e1a\u52a1\u80fd\u5177\u6709&#8221;\u5728\u7ebf&#8221;\u7684\u80fd\u529b\uff0c\u5373\u9488\u5bf9\u6700\u65b0\u9c9c\u7684\u6570\u636e\u8fdb\u884c\u5b9e\u65f6\u751a\u81f3\u4ea4\u4e92\u7684\u67e5\u8be2\uff0c\u8fd9\u4e5f\u662f\u73b0\u5728\u6982\u5ff5\u4e0a\u5f88\u706b\u70ed\u7684HTAP\u6570\u636e\u5e93\u7684\u4e3b\u8981\u80fd\u529b\u3002\u5bf9\u7ebf\u4e0a\u6d77\u91cf\u5b9e\u4f8b\u7684\u65e5\u5e38\u76d1\u63a7\u548c\u8fd0\u7ef4\u4e2d\uff0c\u6211\u4eec\u53d1\u73b0\u4e91\u4e0a\u8ba1\u7b97\u8d44\u6e90\u7684\u5229\u7528\u7387\u666e\u904d\u662f\u504f\u4f4e\u7684\uff08e.g 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Query\uff09\u3002\u6982\u5ff5\u987e\u540d\u601d\u4e49\uff0c\u591a\u673a\u5e76\u884c\u610f\u5473\u7740\u5229\u7528\u66f4\u591a\u8ba1\u7b97\u8282\u70b9\u7684\u8d44\u6e90\u5b8c\u6210\u67e5\u8be2\uff0cPolarDB\u7684\u8ba1\u7b97\u5c42\u662f\u4e00\u5199\u591a\u8bfb\u7684\u90e8\u7f72\u65b9\u5f0f\uff0c\u5df2\u6709\u7684\u5e76\u884c\u67e5\u8be2\u662f\u6307\u5728\u5355\u4e2aRW\/RO\u8282\u70b9\u5185\u7684\u591a\u7ebf\u7a0b\u5e76\u884c\uff0c\u8fd9\u5bf9\u4e8e\u8f83\u5c0f\u7684\u6570\u636e\u91cf\uff08\u51e0\u767eGB\uff09\u662f\u6bd4\u8f83ok\u7684\uff0c\u4f46\u5f88\u591a\u7528\u6237\u968f\u7740\u81ea\u8eab\u4e1a\u52a1\u53d1\u5c55\uff0c\u6570\u636e\u5f00\u59cb\u5230\u8fbe\u4e86TB\u7ea7\u522b\uff0c\u6709\u7684\u751a\u81f3\u5355\u8868\u5c31\u670920~30TB\uff0c\u8fd9\u5df2\u7ecf\u8d85\u8fc7\u4e86\u5355\u4e2a\u8282\u70b9\u7684\u5904\u7406\u80fd\u529b\uff0c\u800c\u591a\u673a\u5e76\u884c\u6b63\u662f\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u79cd\u573a\u666f\uff0c\u901a\u8fc7\u7a81\u7834\u5355\u673a\u7684CPU\/IO\u74f6\u9888\u5c06\u6574\u4e2a\u8ba1\u7b97\u5c42\u7684\u8d44\u6e90\u6253\u901a\uff0c\u5b9e\u73b0\u8d44\u6e90\u7684\u5168\u5c40\u5747\u8861\u4e0e\u5168\u5c40\u5229\u7528\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552765\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552766\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552767\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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loading=\"lazy\"><br 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\/>\u53ef\u4ee5\u770b\u5230\uff0c\u6bcf\u4e2aworker\u90fd\u5b8c\u6210\u4e86it1\u548cit2\u8868\u7684\u5168\u91cfjoin\u548c\u7269\u5316\u64cd\u4f5c\uff0c\u8fd9\u4e2a\u91cd\u590d\u7684\u52a8\u4f5c\u6709\u53ef\u80fd\u4ee3\u4ef7\u5f88\u5927\uff0c\u4e14\u6ca1\u6709\u5fc5\u8981\uff0c\u66f4\u6709\u6548\u7684\u65b9\u6cd5\u53ef\u80fd\u662f\u8fd9\u6837\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552771\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u8fd9\u6837\u7684\u8ba1\u5212\u5f62\u6001\uff0c\u53ef\u4ee5\u4f7f\u6bcf\u4e2aworker\u90fd\u5b8c\u6210\u66f4\u5c0f\u7684\u8ba1\u7b97\u91cf\uff0c\u5f53\u7136\u8fd9\u53ea\u662f\u4e00\u4e2a\u6781\u7b80\u4f8b\u5b50\uff0c\u5b9e\u9645\u60c5\u51b5\u53ef\u80fd\u590d\u6742\u7684\u591a\u3002\u5f53\u7136\u5982\u679c\u7269\u5316\u672c\u8eab\u6d89\u53ca\u7684\u8ba1\u7b97\u91cf\u5df2\u7ecf\u5f88\u5c0f\uff0c\u8ba1\u5212\u5f62\u60011\u4e5f\u8bb8\u66f4\u4f18\uff0c\u8fd9\u8981\u901a\u8fc7\u5206\u5e03\u5f0f\u4f18\u5316\u5668\u7684\u679a\u4e3e\u6846\u67b6\uff0c\u57fa\u4e8e\u7edf\u8ba1\u4fe1\u606f+\u4ee3\u4ef7\u6765\u9009\u62e9\uff0c\u786e\u4fdd\u627e\u5230\u6700\u4f18\u89e3\u3002\u6709\u4e86sjm\u5e76\u884c\u7269\u5316\u7684\u652f\u6301\uff0cTPC-H 100G Q20\uff0c\u572832\u5e76\u884c\u5ea6\u4e0b\u63d0\u901f5.8\u500d\u3002derived table\/cte\u5e76\u884c\u7269\u5316\u7c7b\u4f3c\u4e8esemijoin\uff0cMySQL\u5bf9\u4e8e\u65e0\u6cd5merge\u5230\u5916\u5c42\u7684derived table\/view\u4e5f\u4f1a\u5148\u7269\u5316\u4e0b\u6765\u5e76\u53c2\u4e0e\u5230\u5916\u5c42join\u4e2d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u540c\u6837\u53ef\u4ee5\u5206\u7247\u5b8c\u6210\uff0c\u7531\u4e8e\u793a\u610f\u56fe\u4e0e\u4e0a\u9762\u975e\u5e38\u76f8\u4f3c\uff0c\u56e0\u6b64\u4e0d\u518d\u7ed9\u51fa\uff0c\u4e0d\u8fc7\u719f\u6089MySQL\u6e90\u7801\u7684\u540c\u5b66\u5e94\u8be5\u77e5\u9053\uff0csemijoin-materialize\u548cderived table materialize\u6709\u7740\u5b8c\u5168\u4e0d\u540c\u7684\u4f18\u5316\u8def\u5f84\u548c\u6267\u884c\u673a\u5236\uff0c\u56e0\u6b64PolarDB\u5185\u90e8\u7684\u5e76\u884c\u5b9e\u73b0\u903b\u8f91\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u3002\u6709\u4e86derived table\u5e76\u884c\u652f\u6301\uff0cTPC-H 100G Q13\uff0c\u572832\u5e76\u884c\u5ea6\u4e0b\u63d0\u901f2.2\u500d\u3002\u8282\u70b9\u95f4\u4ea4\u4e92\u4e3a\u5b9e\u73b0\u8de8\u673a\uff0c\u8282\u70b9\u95f4\u8981\u5efa\u7acb\u9ad8\u6548\u7684\u63a7\u5236+\u6570\u636e\u901a\u9053\uff0c\u540c\u65f6\u4e24\u8005\u95f4\u8981\u6709\u5fc5\u8981\u7684\u534f\u8c03\u63a7\u5236\u6765\u786e\u4fdd\u6b63\u786e\u7684early-stop\uff0c\u9519\u8bef\u5904\u7406\u7b49\u673a\u5236\u3002\u63a7\u5236\u901a\u9053\u6211\u4eec\u6269\u5c55\u4e86MySQL\u7684\u547d\u4ee4\u534f\u8bae\u6765\u5b8c\u6210\u4e0b\u53d1\u8ba1\u5212\u3001\u6267\u884c\u63a7\u5236\u3001\u56de\u6536\u72b6\u6001\u7b49\u529f\u80fd\uff0c\u6700naive\u7684\u505a\u6cd5\u662f1: worker\u6570\u7684\u65b9\u5f0f\uff0c\u5373\u5bf9\u6bcf\u4e2aworker\u90fd\u5efa\u7acb\u4e00\u4e2a\u547d\u4ee4\u901a\u9053\uff0c\u4f46\u8fd9\u4e0d\u4ec5\u610f\u5473\u7740\u8fde\u63a5\u7684\u589e\u52a0\uff0c\u4e5f\u4f1a\u9020\u6210\u540c\u4e00\u8282\u70b9\u5185\u7684\u5f88\u591a\u5de5\u4f5c\u91cd\u590d\u6267\u884c\uff08e.g \u8ba1\u5212\u6a21\u677f\u53cd\u5e8f\u5217\u5316\uff0c\u6267\u884c\u73af\u5883\u91cd\u5efa&#8230;\uff09\uff0c\u56e0\u6b64\u6211\u4eec\u8bbe\u8ba1\u4e86\u5982\u4e0b\u63a7\u5236\u901a\u9053\u62d3\u6251\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552772\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u5728\u6bcf\u4e2a\u4e0b\u53d1\u7684\u5b50\u8282\u70b9\u4e0a\u5efa\u7acb\u4e00\u4e2amigrant leader\u89d2\u8272\uff0c\u8be5\u7ebf\u7a0b\u662f\u8282\u70b9\u4e0a\u7684\u4ee3\u7406\uff0c\u8d1f\u8d23\u4e0eleader\u7684\u63a7\u5236\u4fe1\u4ee4\u4ea4\u4e92\u3001\u751f\u6210\u8ba1\u5212\u6a21\u677f\u548c\u6267\u884c\u4e0a\u4e0b\u6587\u7b49\u5171\u4eab\u4fe1\u606f\uff0c\u540c\u65f6\u4e5f\u8981\u8d1f\u8d23\u521b\u5efaworker\u3001\u7ba1\u7406worker\u6267\u884c\u72b6\u6001\u7b49\uff0c\u8fd9\u4e2a\u89d2\u8272\u7684\u8ba1\u7b97\u91cf\u5f88\u5c0f\u57fa\u672c\u4e0d\u5360\u4ec0\u4e48\u8d44\u6e90\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u63a7\u5236\u901a\u9053\u4f18\u5316\u4e3a1:node\u6570\u3002\u6570\u636e\u901a\u9053\u76ee\u524d\u5b9e\u73b0\u4e86\u57fa\u4e8eTCP\u7684\u6570\u636e\u4ea4\u4e92\u534f\u8bae\uff0c\u5728leader\u6784\u5efa\u6267\u884c\u4e0a\u4e0b\u6587\u65f6\u4f1a\u68c0\u67e5\u4e0d\u540c\u5b50\u8ba1\u5212\u7684worker\u95f4\uff0c\u662f\u5426\u4f4d\u4e8e\u540c\u4e00\u8282\u70b9\uff0c\u5982\u5b58\u5728\u8de8\u673a\u5219\u4f7f\u7528\u7f51\u7edc\u901a\u9053\uff0c\u5e76\u5c06\u76f8\u5173\u4fe1\u606f\uff08e.g IP\/Port&#8230;\uff09\u968f\u8ba1\u5212\u7247\u6bb5\u5e8f\u5217\u5316\u5230\u8fdc\u7a0b\u8282\u70b9\u7684migrant leader\u4e0a\uff0c\u5e76\u4f20\u9012\u7ed9\u5bf9\u5e94worker\u7528\u6765\u5efa\u7acb\u975e\u963b\u585e\u7684\u6570\u636e\u901a\u9053\uff0c\u6570\u636e\u901a\u9053\u62d3\u6251\u5982\u4e0b\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552773\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u662f\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u56e0\u7d20\u4e4b\u4e00\uff0c\u4e3a\u6b64\u6211\u4eec\u505a\u4e86\u4e00\u7cfb\u5217\u9488\u5bf9\u6027\u4f18\u5316\u7aef\u53e3\u590d\u7528\u6bcf\u4e2aworker\u53ef\u80fd\u9700\u8981\u5efa\u7acb\u591a\u4e2a\u6570\u636e\u901a\u9053\uff0c\u5e76\u4e14\u53ef\u80fd\u540c\u65f6\u662f\u6570\u636e\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\uff08\u4e0a\u56feslice1\uff09\uff0c\u5982\u679c\u6bcf\u4e2a\u8fde\u63a5\u90fd\u4f7f\u7528\u72ec\u7acb\u7aef\u53e3\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8282\u70b9\u7aef\u53e3\u7528\u5c3d\u3002\u4e3a\u907f\u514d\u8fd9\u4e00\u95ee\u9898\uff0c\u6211\u4eec\u4f18\u5316\u4e3a\u5728\u540c\u4e00\u8282\u70b9\u5185\u7684\u6240\u6709worker\u5171\u7528\u540c\u4e00\u7aef\u53e3\u63a5\u6536\u4e0b\u5c42worker\u7684\u4e2d\u95f4\u7ed3\u679c\u6570\u636e\uff0c\u5e76\u4f7f\u7528\u5168\u5c40\u7684Exchange manager\u7ebf\u7a0b\u7ba1\u7406\u8fde\u63a5\u5e76\u6620\u5c04\u5230\u76ee\u6807\u6536\u7aefworker\u3002\u7f13\u51b2\u961f\u5217\u7531\u4e8e\u6d41\u6c34\u7ebf\u7684\u6267\u884c\u6a21\u5f0f\uff0c\u5982\u679c\u6bcf\u4eceiterator\u5410\u51fa\u4e00\u6761\u6570\u636e\u5c31\u5411\u7f51\u7edc\u53d1\u9001\uff0c\u5fc5\u7136\u5e26\u6765\u9891\u7e41\u7cfb\u7edf\u8c03\u7528\u7684\u5f00\u9500\uff0c\u4e3a\u6b64\u5728\u6536\u53d1\u7aef\u5747\u5f15\u5165\u4e86\u5faa\u73af\u7f13\u51b2\u961f\u5217\uff0c\u5b9e\u73b0\u4e86\u6d41\u63a7\u548cbatching+pipeling\uff0c\u63d0\u5347\u4f20\u8f93\u6027\u80fd\u3002\u5f02\u6b65\u8bbe\u8ba1\u4e3a\u4e86\u964d\u4f4e\u7f51\u7edc\u4f20\u8f93\u4e0d\u7a33\u5b9a\u4ee5\u53caworker\u8d1f\u8f7d\u4e0d\u5747\u8861\u7684\u5f71\u54cd\uff0c\u6570\u636e\u901a\u9053\u4f7f\u7528\u4e86\u5168\u5f02\u6b65\u5316\u8bbe\u8ba1\uff0c\u5bf9\u4e8e\u5404\u4e2a\u901a\u9053\u7684\u8bfb\/\u5199\u5747\u662f\u975e\u963b\u585e\u7684\uff0c\u5982\u679c\u67d0\u4e2a\u901a\u9053\u6682\u65f6\u65e0\u6cd5\u6536\u53d1\uff0c\u5219\u5207\u6362\u5230\u4e0b\u4e00\u4e2a\u901a\u9053\u7ee7\u7eed\u64cd\u4f5c\uff0c\u8fd9\u663e\u8457\u63d0\u5347\u4e86\u6574\u4f53\u7684cpu\u5229\u7528\u7387\u548c\u4f20\u8f93\u6548\u7387\u3002\u4f46\u4ecd\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff1a\u5728\u9ad8\u5e76\u53d1\u5ea6\u7684shuffle\u4e2d\uff0c\u6570\u636e\u901a\u9053\u4f1a\u4ea7\u751f\u7ecf\u5178\u7684\u8fde\u63a5\u7206\u70b8\u95ee\u9898\uff08 N * N\u7684\u8fde\u63a5\u6570\uff09\uff0c\u8fd9\u5bf9\u4e8e\u96c6\u7fa4\u7684\u7f51\u7edc\u5f00\u9500\u8fd8\u662f\u6bd4\u8f83\u9ad8\u7684\uff0c\u4e3a\u6b64\u6211\u4eec\u540e\u7eed\u6709\u4e24\u65b9\u9762\u7684\u89c4\u5212\uff1a\u5b9e\u73b0proxy\u6a21\u5f0f\u7684\u6570\u636e\u4ea4\u4e92\u534f\u8bae\uff0c\u591a\u8def\u6570\u636e\u590d\u7528\u540c\u4e00\u8fde\u63a5\uff0c\u4ee5\u5e94\u5bf9\u66f4\u5927\u89c4\u6a21\u7684\u5e76\u884c\uff08e.g \u53c2\u8003Deepgreen\uff09\u4f7f\u7528RDMA\u5b9e\u73b0\u6570\u636e\u4f20\u8f93\u534f\u8bae\uff0c\u5f7b\u5e95bypass\u7f51\u7edc\u534f\u8bae\u6808\u548ckernel\u7684\u5904\u7406\u5f00\u9500\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u6027\u80fd\u6267\u884c\u8ba1\u5212\u5e8f\u5217\u5316\u5206\u5e03\u5f0f\u6267\u884c\u8ba1\u5212\u7684\u8ba1\u5212\u7247\u6bb5\u5982\u4f55\u4f20\u9012\u5230\u8fdc\u7a0b\u8282\u70b9\u5e76\u8f6c\u6362\u4e3a\u51c6\u786e\u7684\u7269\u7406\u6267\u884c\u8ba1\u5212\uff0c\u662f\u5206\u5e03\u5f0f\u8ba1\u7b97\u5f15\u64ce\u5fc5\u987b\u8981\u89e3\u51b3\u7684\u95ee\u9898\u3002Microsoft Synapse\u548cOracle PX\u901a\u8fc7\u5c06\u8ba1\u5212\u7247\u6bb5\u8f6c\u6362\u4e3aSQL\u8bed\u53e5\uff0c\u4e0b\u53d1\u5230\u96c6\u7fa4\u4e2d\u5404\u5b50\u8282\u70b9\uff0c\u5e76\u5728\u8282\u70b9\u672c\u5730\u91cd\u65b0\u89e3\u6790\u751f\u6210\u6267\u884c\u8ba1\u5212\u6765\u5b9e\u73b0\u5b50\u8ba1\u5212\u7684\u5206\u53d1\u3002\u8fd8\u6709\u4e00\u4e9b\u7cfb\u7edf\uff08e.g Greenplum\uff09\u4f1a\u5206\u53d1\u7269\u7406\u8ba1\u5212\u7684\u903b\u8f91\u63cf\u8ff0\uff0c\u5e76\u5728\u5b50\u8282\u70b9\u4e0a\u57fa\u4e8e\u62bd\u8c61\u63cf\u8ff0\u91cd\u65b0\u6784\u5efa\u7269\u7406\u8ba1\u5212\u3002\u4f46PolarDB\u8003\u8651\u5230MySQL\u5b9e\u73b0\u7684\u7279\u70b9\u5e76\u517c\u987e\u8ba1\u5212\u751f\u6210\u7684\u9ad8\u6548\u6027\uff0c\u9009\u62e9\u4e86\u5e8f\u5217\u5316\u8ba1\u5212\u6a21\u677f\u7684\u65b9\u5f0f\uff0c\u5177\u4f53\u5982\u4e0b\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552774\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>leader\u5728\u5b8c\u6210\u5206\u5e03\u5f0f\u4f18\u5316\u540e\u751f\u6210\u7269\u7406\u8ba1\u5212\u7247\u6bb5\u7684\u6a21\u677f\uff08\u7c7b\u4f3cMySQL\u7684\u7269\u7406\u8ba1\u5212\uff09\uff0c\u7136\u540e\u5e8f\u5217\u5316\u8be5\u6a21\u677f\u4e8c\u8fdb\u5236\u7684\u8ba1\u5212\u6a21\u677f\u5206\u53d1\u5230\u5404\u5b50\u8282\u70b9\u7684migrant leader\u4e0amigrant leader\u53cd\u5e8f\u5217\u5316\u540e\uff0c\u8fd8\u539f\u51fa\u672c\u5730\u8ba1\u5212\u6a21\u677f\u548c\u6267\u884c\u4e0a\u4e0b\u6587\u4fe1\u606f\uff08e.g variables\/readview&#8230;)\u5404worker\u7ebf\u7a0b\u4ece\u672c\u5730\u6a21\u677f\u4e2dclone\u51fa\u81ea\u5df1\u7684\u7269\u7406\u6267\u884c\u8ba1\u5212\uff0c\u5b9e\u9645\u6267\u884c\u8de8\u8282\u70b9parallel scanPolarDB\u7684\u5e76\u884c\u67e5\u8be2\u80fd\u529b\u4e0einnodb btree\u7684\u903b\u8f91\u5206\u7247+\u5e76\u884c\u8bbf\u95ee\u5bc6\u4e0d\u53ef\u5206\uff0c\u7531\u4e8e\u4e0d\u662fshare nothing\u7684\u67b6\u6784\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5bf9\u5171\u4eab\u8868\u7684\u5e76\u884c\u8bfb\u53d6\uff0c\u5728innodb\u5c42\u5bf9leaf 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decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552775\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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\/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552777\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u4f8b\u5982\uff1a\u7528\u6237\u8bbe\u7f6e\u5e76\u884c\u5ea6\u4e3a2\uff0c\u5f53\u5f00\u542fAUTO\u6a21\u5f0f\u65f6\uff0c\u5982\u672c\u5730\u8282\u70b9\u8d44\u6e90\u5145\u8db3\u5219\u9009\u62e9\u672c\u5730\u6267\u884c 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\/>\u5206\u5e03\u5f0f\u4efb\u52a1\u8c03\u5ea6\u5668\u4efb\u52a1\u8c03\u5ea6\u5668\u4e3a\u65e0\u4e2d\u5fc3\u67b6\u6784\uff0c\u6bcf\u4e2a\u8ba1\u7b97\u8282\u70b9\u5747\u53ef\u63a5\u53d7\u67e5\u8be2\u5e76\u901a\u8fc7\u672c\u5730Coordinator\u5b8c\u6210\u67e5\u8be2\u8c03\u5ea6\u3002\u9996\u5148\u4f18\u5316\u5668\u751f\u6210\u7684\u5206\u5e03\u5f0f\u6267\u884c\u8ba1\u5212\u4f1a\u8fdb\u5165FIFO\u961f\u5217\uff0cScheduler\u4ece\u961f\u9996\u83b7\u53d6\u4efb\u52a1\uff0c\u901a\u8fc7\u5168\u5c40\u8d44\u6e90\u89c6\u56fe\uff08\u89c1\u4e0b\uff09\u4e3a\u8ba1\u7b97\u4efb\u52a1\u7533\u8bf7\u8ba1\u7b97\u8d44\u6e90\u6c60\uff08CRB List\uff09\u3002\u5982\u8d44\u6e90\u4e0d\u8db3\u5219\u7ee7\u7eed\u7b49\u5f85\uff0c\u76f4\u5230\u6709\u7a7a\u95f2\u8d44\u6e90\u6216\u8d85\u65f6\u56de\u9000\u4e32\u884c\u3002\u5168\u5c40\u8d44\u6e90\u89c6\u56fe\u8be5\u6a21\u5757\u8d1f\u8d23\u6536\u96c6\u548c\u7ef4\u62a4\u5404\u8282\u70b9\u7684\u8d44\u6e90\u8d1f\u8f7d\u4fe1\u606f\uff08e.g CPU\/Memory\/Concurrency&#8230;\uff09\uff0c\u6bcf\u4e2a\u8282\u70b9\u5b9a\u65f6\u91c7\u96c6\u81ea\u8eab\u8d1f\u8f7d\u4fe1\u606f\u5e76\u4ee5UDF\u62a5\u6587\u5e7f\u64ad\u5230\u96c6\u7fa4\u4e2d\uff0c\u8fd9\u6837\u6bcf\u4e2a\u8282\u70b9\u90fd\u4f1a\u7ef4\u62a4\u4e00\u4efd\u5168\u5c40\u8d44\u6e90\u4fe1\u606f\u7684\u5feb\u7167\u3002\u8ba1\u7b97\u8d44\u6e90\u9884\u7b97\u8ba1\u7b97\u8d44\u6e90\u9884\u7b97\uff08Compute Resource Bugdet. CRB\uff09\u662f\u5bf9\u8282\u70b9\u8d1f\u8f7d\u8d44\u6e90\u7684\u4e00\u4e2a\u8bc4\u4f30\u503c\uff0c\u4ee3\u8868\u8be5\u8282\u70b9\u5269\u4f59\u7684\u8ba1\u7b97\u80fd\u529b\u3002\u7531\u4e8e\u8d44\u6e90\u4fe1\u606f\u5e7f\u64ad\u662f\u5f02\u6b65\u7684\uff0c\u65e0\u6cd5\u5b8c\u5168\u907f\u514d\u7531\u4e8estall\u5bfc\u81f4\u7684\u4e0d\u51c6\u786e\u8c03\u5ea6\uff0c\u4e3a\u907f\u514d\u8d44\u6e90\u5206\u914d\u8fc7\u8f7d\/\u4e0d\u8db3\uff0c\u5728\u8ba1\u7b97\u5355\u4e2a\u8282\u70b9\u7684\u6709\u6548\u9884\u7b97\u65f6\u6211\u4eec\u5f15\u5165\u4e86\u4e00\u4e2a\u81ea\u9002\u5e94\u56e0\u5b50\uff0c\u8be5\u56e0\u5b50\u4f1a\u6309\u5982\u4e0b\u7b56\u7565\u8c03\u6574\uff1a\u8fde\u7eedN\u6b21\u8d1f\u8f7d\u4fe1\u606f\u65e0\u660e\u663e\u6ce2\u52a8\uff0cfactor\u4e0a\u8c0310%\uff1b\u8fde\u7eedN\/2\u6b21\u8d1f\u8f7d\u4fe1\u606f\u6709\u660e\u663e\u4e0a\u5347\uff0cfactor\u4e0b\u8c0320%\uff1b\u76ee\u6807\u8282\u70b9\u5e76\u884c\u8d44\u6e90\u8017\u5c3d\uff0cfactor\u76f4\u63a5\u4e0b\u8c03\u4e3a0\uff0c\u7981\u6b62\u5206\u914dworker\u5206\u914dCRB\u5f53\u83b7\u53d6\u5230\u8d44\u6e90\u6c60\u540e\uff0c\u6c60\u4e2d\u7684\u5217\u8868\u4f1a\u6d89\u53ca\u591a\u4e2a\u8282\u70b9\uff0c\u90a3\u5982\u4f55\u5c06workers\u96c6\u5408\u5206\u914d\u5230\u8fd9\u4e9b\u8282\u70b9\u4e2d\u5462\uff1f\u8fd9\u91cc\u4f1a\u8003\u8651\u57fa\u4e8e\u4e24\u4e2a\u56e0\u7d201\u3001cache\u4eb2\u548c\u5ea6\uff1a\u9488\u5bf9\u6700\u4e0b\u5c42leaf workers\u751f\u6548\uff0c\u524d\u9762\u5df2\u63d0\u5230\uff0c\u5728\u4e3a\u8868\u5207\u5206granules\u65f6\uff0c\u4f1a\u4ee5pre-assign\u65b9\u5f0f\u5c06\u5404granules\u96c6\u5408\u7ed1\u5b9a\u5230\u5404\u8282\u70b9\u4e0a\uff0c\u6bcf\u4e2aworker\u4f1a\u6839\u636e\u81ea\u5df1\u6240\u5c5e\u7684granule range\u6620\u5c04\u5230\u76ee\u6807\u8282\u70b9\uff0c\u5982\u679c\u8be5\u8282\u70b9\u6709\u8d44\u6e90\u9884\u7b97\u4f9b\u8be5worker\u6267\u884c\uff0c\u5219\u6267\u884c\u5206\u53d1\uff08\u590d\u7528\u8282\u70b9\u4e2d\u53ef\u80fd\u7f13\u5b58\u7684pages\uff09\uff0c\u5426\u5219\u53ea\u80fd\u8c03\u5ea6\u5230\u5176\u4ed6\u8282\u70b9\u6267\u884c<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552779\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>2\u3001\u6700\u5c0f\u5316\u8de8\u673a\u6570\u636e\u4f20\u8f93\uff1a\u9488\u5bf9\u975eleaf workers\u751f\u6548\uff0c\u4e0a\u5c42worker\u5728\u5206\u914d\u65f6\u8981\u53c2\u8003\u4e0b\u5c42worker\u5c3d\u91cf\u505a&#8221;\u7ad6\u5411&#8221;\u5207\u5206\uff0c\u51cf\u5c11\u8de8\u673a\u6570\u636e\u4ea4\u4e92\uff0c\u4f8b\u5982\u4e0b\u56fe\u5de6\u4fa7\u7684\u6570\u636e\u5206\u53d1\u603b\u91cf\u4f1a\u5c11\u4e8e\u53f3\u4fa7<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552780\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u6027\u80fd\u8bc4\u4f30\u6027\u80fd\u7684\u8868\u73b0\u65b9\u5f0f\u53ef\u4ee5\u6709\u5f88\u591a\u79cd\uff0c\u8fd9\u91cc\u6211\u4eec\u65e2\u4f1a\u5173\u6ce8\u4e00\u822c\u4ea7\u54c1\u90fd\u4f1a\u6d4b\u8bd5\u7684TPC-H\u67e5\u8be2\u6027\u80fd\uff0c\u4e5f\u4f1a\u9488\u5bf9\u524d\u9762\u63d0\u5230\u7684\u51e0\u4e2a\u7279\u5b9a\u573a\u666f\u6765\u9010\u4e00\u505a\u4e0b\u8bc4\u4f30\uff0c\u786e\u5b9a\u5f39\u6027\u591a\u673a\u5e76\u884c\u7684\u884c\u4e3a\u662f\u5426\u7b26\u5408\u8bbe\u8ba1\u9884\u671f\u3002\u6ce8\uff1a\u672c\u6d4b\u8bd5\u662f\u901a\u8fc7\u8d2d\u4e70PolarDB 8.0.2\u7248\u672c\u7ebf\u4e0a\u5b9e\u4f8b\uff0c\u5173\u95ed\u4e862\u4e2a\u5c5e\u4e8e\u5b9e\u9a8c\u72b6\u6001\u7684\u4f18\u5316\u5668\u53c2\u6570\u3002set optimizer_switch=&#8221;hash_join_cost_based=off&#8221;;<br \/>set cbqt_enabled=off;<br \/>\u7136\u540e\u5728\u96c6\u7fa4\u914d\u7f6e\u9875\u9762\u4e0a\u5f00\u542f\u591a\u8282\u70b9\u5e76\u884c\u5e76\u8bbe\u7f6e\u5355\u8282\u70b9\u5e76\u884c\u5ea6\u5373\u53ef\uff0c\u65e0\u9700\u5176\u4ed6\u64cd\u4f5c\u548c\u8c03\u4f18\uff0c\u57fa\u672c\u5c5e\u4e8e\u5f00\u7bb1\u5373\u6d4b\u3002\u6d4b\u8bd5\u4f7f\u7528\u6807\u51c6\u7684 TPC-H [3]\u6570\u636e\uff08\u4e3b\u5916\u952e\uff09\u548c\u8bed\u53e5\u3002\u5355\u673a v.s \u591a\u673a\u524d\u9762\u6211\u4eec\u63d0\u5230\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f\u76f8\u540c\u603b\u4f53\u5e76\u884c\u5ea6\u7684\u60c5\u51b5\u4e0b\uff0c\u5927\u89c4\u683c\u5355\u673a\u4f1a\u6bd4\u5c0f\u89c4\u683c\u591a\u673a\u66f4\u597d\u5417\uff1f\u4e3a\u4e86\u9a8c\u8bc1\u6211\u4eec\u4f7f\u7528\u5982\u4e0b\u6d4b\u8bd5\u65b9\u6cd5\uff1a1node\u00a032c\u7684polar.mysql.x8.4xlarge v.s 2node\u00a016c\u7684polar.mysql.x8.2xlarge\uff0c\u4e24\u8005CPU\/MEM\u8d44\u6e90\u6301\u5e73\uff0c\u5bf9\u7528\u6237\u6765\u8bf4\u6210\u672c\u4e5f\u76f8\u540cCPU boundTPC-H 100G\uff0c22\u6761\u67e5\u8be2\u6bcf\u6761\u6267\u884c3\u6b21\u53d6\u7b2c3\u6b21\u7ed3\u679c\uff0c\u6b64\u65f6\u6570\u636e\u5b8c\u5168cache\u5728\u5b9e\u4f8b\u5185\u5b58\u4e2d\u65e0IO\uff0c\u5bf9\u6bd4\u5982\u4e0b\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552781\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u53ef\u4ee5\u770b\u5230\u57fa\u672c\u6240\u6709\u67e5\u8be2\u90fd\u53d8\u5f97\u66f4\u5feb\u4e86\uff0c\u8fd9\u4e5f\u7b26\u5408\u6211\u4eec\u5bf9\u5e76\u53d1\u8d44\u6e90\u4e89\u62a2\u6d88\u51cf\u7684\u9884\u671fIO bound\u4f7f\u7528TPC-H 1T\u505apower run\uff0c\u7531\u4e8e\u5185\u5b58\u4e25\u91cd\u4e0d\u8db3\uff0c\u56e0\u6b64\u4e00\u5b9a\u4f1a\u4ea7\u751f\u5927\u91cf\u8bfbIO\uff0c\u7ed3\u679c\u5bf9\u6bd4\u5982\u4e0b\uff1a\u6ce8\uff1apower run\u6307\u91cd\u542f\u5b9e\u4f8b\u6240\u6709\u8282\u70b9\u7684docker\u5b9e\u4f8b\u540e\uff0c\u987a\u5e8f\u6267\u884c22\u6761\u67e5\u8be2SQL<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552782\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u53ef\u4ee5\u770b\u5230\u7531\u4e8e\u6709\u4e86\u4e24\u4e2a\u8282\u70b9\uff0c\u603b\u4f53\u7684IO\u5e26\u5bbd\u4e5f\u6269\u5927\u4e86\u4e00\u500d\uff0c\u80fd\u591f\u66f4\u597d\u7684\u5229\u7528\u5e95\u5c42\u5171\u4eab\u5b58\u50a8\u7684\u5927\u541e\u5410\uff0c\u591a\u6570\u67e5\u8be2\u6709\u4e86\u63d0\u5347\uff0c\u4f46\u90e8\u5206\u67e5\u8be2\u4f1a\u53d8\u6162\uff0c\u89c2\u5bdf\u53d1\u73b0\u8fd9\u4e9b\u67e5\u8be2\u4e3b\u8981\u90fd\u5b58\u5728\u591a\u4e2a\u5927\u8868join\u7684\u60c5\u51b5\uff0c\u8fd9\u662f\u7531\u4e8e\u5728\u505a\u591a\u8868join\u65f6\uff0c\u57fa\u4e8e\u4e3b\u5916\u952e\u7684nested loop join\u4f1a\u5e26\u6765\u4e00\u5b9a\u7684\u4e8c\u7ea7\u7d22\u5f15\u968f\u673a\u56de\u8868\uff0c\u5728\u5355\u8282\u70b9\u65f6\uff0c\u540c\u4e00\u4e2a\u4e3b\u952e\u7d22\u5f15page\u5728\u88ab\u6dd8\u6c70\u4e4b\u524d\u5f88\u53ef\u80fd\u88ab\u67d0\u4e9bworker\u7ebf\u7a0b\u590d\u7528\u800c\u52a0\u901f\u4e86\u90a3\u4e9bworker\u7684\u6267\u884c\uff0c\u4f46\u5206\u6563\u5230\u591a\u8282\u70b9\u540e\u8fd9\u79cd\u590d\u7528\u7387\u964d\u4f4e\u4e86\uff0c\u4ea7\u751f\u4e86\u66f4\u591a\u7684page thrashing\u3002\u4f46\u603b\u4f53\u6267\u884c\u65f6\u95f4\u4ecd\u7136\u591a\u8282\u70b9\u662f\u66f4\u5feb\u7684\uff0c\u63d0\u5347\u4e8621%\u3002\u6a2a\u5411\u6269\u5bb9\u8fd9\u91cc\u6211\u4eec\u6765\u770b\u4e0b\u968f\u7740\u96c6\u7fa4\u7684\u6a2a\u5411\u6269\u5bb9\uff08scale out\uff09\uff0c\u67e5\u8be2\u7684\u6269\u5c55\u6027\u5982\u4f55\uff0c\u4ecd\u7136\u8003\u8651CPU bound\/IO bound\u4e24\u79cd\u573a\u666fCPU bound\u540c\u6837\u4f7f\u7528TPC-H 100G\uff0c22\u6761\u67e5\u8be2\u6bcf\u6761\u8dd13\u6b21\u53d6\u7b2c3\u6b21\u7ed3\u679c\uff0c\u4f7f\u752816c\u7684polar.mysql.x8.2xlarge\u89c4\u683c\u7684\u8282\u70b9\uff0c\u4ece2\u8282\u70b9\u5f00\u59cb\u4f9d\u6b21\u7ffb\u500d\u8282\u70b9\u6570<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552783\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>IO bound\u4ecd\u7136\u4f7f\u7528TPC-H 1T\u505apower run\uff0c\u4e5f\u662f\u4ece2\u8282\u70b9\u5f00\u59cb\u4f9d\u6b21\u7ffb\u500d<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552784\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u53ef\u4ee5\u770b\u5230\u4ece16DoP\u5230256DoP\uff0c\u51b7\u70ed\u67e5\u8be2\u7684\u6027\u80fd\u5747\u5f97\u5230\u4e86\u7ebf\u6027\u63d0\u5347\u3002\u5728\u79bb\u7ebf\u6df7\u5408\u4e3a\u8bc4\u4f30\u4e4b\u524d\u63d0\u5230\u7684\u5728\u79bb\u7ebf\u6df7\u5408\u573a\u666f\u7684\u6548\u679c\uff0c\u6211\u4eec\u5efa\u7acb\u4e86\u4e00\u4e2a1rw+3ro\u7684\u5b9e\u4f8b\uff0c\u5e76\u521b\u5efaoltp\u3001olap\u4e24\u4e2a\u96c6\u7fa4\u5206\u522b\u6a21\u62df\u5728\u7ebf\u4e8b\u52a1(rw1+ro1+ro2)\u548c\u79bb\u7ebf\u5206\u6790(ro1+ro2+ro3)\u8d1f\u8f7d\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552785\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u4f7f\u75282\u4e2aclient\uff1aClient-1\u8fde\u63a5oltp cluster\uff0c\u4f7f\u7528sysbench\u505a\u77ed\u4e8b\u52a1\u8bfb\u5199\u538b\u6d4b\u3002Client-2\u8fde\u63a5olap cluster\uff0c\u4f7f\u7528tpch\u6570\u636e\u6539\u9020\u540e\u7684sysbench\uff0c\u4f46\u4e3a\u770b\u51fa\u6548\u679c\uff0c\u8fd9\u91cc\u4e5f\u6ca1\u6709\u4f7f\u7528\u5f88\u5927\u7684\u957f\u67e5\u8be2\uff0c\u4ec5\u4e3a\u4e86\u4f7f\u5176\u8db3\u591f\u4f7f\u7528\u591a\u673a\u8d44\u6e90\u3002\u6d4b\u8bd5\u6d41\u7a0b\uff1aClient-1 \u6682\u505c\uff0c\u6a21\u62dfoltp\u4e1a\u52a1\u7a7a\u95f2\u3002Client-2 \u5f00\u59cb\u76f4\u63a5\u8fde\u63a5ro3\u8282\u70b9\uff0c\u89c2\u5bdfqps\u3002Client-1\u6062\u590d\uff0c\u5c06oltp cluster\u8d44\u6e90\u5360\u6ee1\uff0c\u6b64\u65f6\u89c2\u5bdfClient-2\u7684qps\u53d8\u5316\u3002\u518d\u6b21\u6682\u505cClient-1\u7684\u538b\u529b\uff0c\u89c2\u5bdfClient-2\u7684qps\u53d8\u5316\u4e0b\u56fe\u7ed9\u51faClient-2\u7684sysbench\u622a\u56fe<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552786\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u53ef\u4ee5\u770b\u5230\u5728oltp cluster\u6709\u538b\u529b\u65f6\uff0cClient-2\u7684\u67e5\u8be2\u53ea\u5728ro3\u8282\u70b9\u5185\u5e76\u884c\uff0c\u541e\u5410\u4e5f\u8f83\u4f4e\u3002\u5f53tp\u4e1a\u52a1\u7a7a\u95f2\u65f6\uff0cap\u67e5\u8be2\u7684\u8d1f\u8f7d\u5206\u53d1\u5230ro1\/ro2\u8282\u70b9\uff0c\u541e\u5410\u91cf\u7acb\u523b\u4e0a\u5347\u3002\u5f53tp\u4e1a\u52a1\u518d\u6b21\u7e41\u5fd9\u65f6\uff0cap\u7684\u67e5\u8be2\u80fd\u529b\u91cd\u65b0\u56de\u843d\u5230\u5355\u8282\u70b9\u6c34\u5e73\u5bf9\u8d1f\u8f7d\u53d8\u5316\u7684\u54cd\u5e94\u5ef6\u8fdf\u57281-2\u79d2\u5de6\u53f3\u3002TPCH\u9488\u5bf9\u7edd\u5bf9\u6027\u80fd\u6211\u4eec\u5728\u5404\u79cd[\u8282\u70b9\u6570\u00a0\u5e76\u884c\u5ea6]\u7684\u7ec4\u5408\u4e0b\u8fdb\u884c\u4e86\u5927\u91cf\u6d4b\u8bd5\uff0c\u8fd9\u91cc\u4ec5\u7ed9\u51fa 16\u00a016 = 256\u5e76\u884c\u5ea6 \u7684\u6570\u636e100G hot<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552787\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>1T hot<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042552788\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u53ef\u4ee5\u770b\u5230\uff0c\u65e0\u8bba\u662f100G\u8fd8\u662f1T\u7684\u6570\u636e\u91cf\uff0c\u591a\u673a\u5e76\u884c\u90fd\u5f97\u5230\u4e86\u975e\u5e38\u4e0d\u9519\u7684\u6027\u80fd\u6570\u636e\uff0c\u4f5c\u4e3a\u4e00\u6b3e\u4e3b\u8981\u9762\u5411\u9ad8\u5e76\u53d1TP\u8d1f\u8f7d\u7684\u4e8b\u52a1\u578b\u6570\u636e\u5e93\uff0c\u8fd9\u5df2\u7ecf\u4f53\u73b0\u51fa\u4e86PolarDB MySQL\u4e0d\u4fd7\u7684\u5b9e\u65f6\u5206\u6790\u80fd\u529b\u3002\u603b\u7ed3\u4e0e\u5c55\u671bPolarDB MySQL\u7684\u5f39\u6027\u591a\u673a\u5e76\u884c\uff08ePQ\uff09\u4e3a\u9762\u5411\u5927\u6570\u636e\u91cf\u7684\u590d\u6742\u5206\u6790\u67e5\u8be2\u63d0\u4f9b\u4e86\u66f4\u5f3a\u5927\u7684\u5b9e\u65f6\u52a0\u901f\u80fd\u529b\uff0c\u4f46\u5176\u4f5c\u7528\u4e0d\u6b62\u4e8e\u6b64\uff0c\u4f5c\u4e3aPolarDB\u4e91\u539f\u751f\u7279\u6027\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u66f4\u91cd\u8981\u7684\u80fd\u529b\u662f\u6a2a\u5411\u6253\u901a\u96c6\u7fa4\u7684\u8ba1\u7b97\u8d44\u6e90\uff0c\u5c06\u96c6\u7fa4\u4e2d\u7684\u5404\u8282\u70b9\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u6765\u8003\u8651\uff0c\u6216\u662f\u5bf9\u5927\u8868\u67e5\u8be2\u8fdb\u884c\u52a0\u901f\uff0c\u6216\u662f\u5bf9\u67e5\u8be2\u8fdb\u884c\u52a8\u6001\u8c03\u5ea6\uff0c\u4ece\u800c\u4fdd\u8bc1\u5206\u6790\u7684\u5b9e\u65f6\u6027\u548c\u8d44\u6e90\u7684\u5145\u5206\u5747\u8861\u5229\u7528\u3002\u6b64\u5916\u4e0e\u5f39\u6027\u80fd\u529b\u7684\u7ed3\u5408\u8ba9\u5e76\u884c\u80fd\u591f\u5e94\u7528\u5230\u66f4\u5e7f\u6cdb\u7684\u573a\u666f\u4e2d\uff0c\u4e3a\u5ba2\u6237\u63d0\u4f9b\u66f4\u6781\u81f4\u7684\u6027\u4ef7\u6bd4\u3002\u591a\u673a\u5e76\u884c\u7684\u5de5\u4f5c\u8fdc\u6ca1\u6709\u7ed3\u675f\uff0c\u540e\u7eed\u8fd8\u6709\u5f88\u591a\u7684\u4f18\u5316\u548c\u5e94\u7528\u573a\u666f\u7b49\u5f85\u6211\u4eec\u6316\u6398\uff1a\u589e\u5f3aMySQL\u539f\u751f\u4f18\u5316\u5668\uff0c\u7ed9\u51fa\u66f4\u4f18\u7684join 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href=\"https:\/\/link.segmentfault.com\/?enc=664GZF2Q6FS2%2FJWHoPjfHA%3D%3D.mAts8aUYlsKIKW8nn1SZ6QfENPaHkcdQrNUJynUXZ8A5MK2x5Rr2u1GFIf%2BhQT17vZiASeQyDpWgy7fEDnMngg%3D%3D\" rel=\"nofollow\">https:\/\/help.aliyun.com\/docum&#8230;<\/a>[2]<a href=\"https:\/\/link.segmentfault.com\/?enc=xACdXEGbWbOuYUwv9bQuNg%3D%3D.uX2ifdG7kWaQ%2BGSifJ49njfwpAaB1FtPZ6CoeW%2FRXAlDl4cYg0808d96htS864ptbz%2FRST1kNBTwd4YjWTh41g%3D%3D\" rel=\"nofollow\">https:\/\/help.aliyun.com\/docum&#8230;<\/a>[3]<a href=\"https:\/\/link.segmentfault.com\/?enc=p1sQXfd9AbavCqCY9PPN3g%3D%3D.7UzTj3XGcWg4HVttW6XPYE0gYANv676%2Frei4rDBlEgA%3D\" rel=\"nofollow\">https:\/\/www.tpc.org\/tpch\/<\/a>\u63a8\u8350\u9605\u8bfb1.\u5982\u4f55\u5199\u51fa\u4e00\u7bc7\u597d\u7684\u6280\u672f\u65b9\u6848\uff1f2.\u963f\u91cc10\u5e74\u6c89\u6dc0\uff5c\u90a3\u4e9b\u6280\u672f\u5b9e\u6218\u4e2d\u7684\u67b6\u6784\u8bbe\u8ba1\u65b9\u6cd53.\u5982\u4f55\u505a\u597d\u201c\u9632\u5fa1\u6027\u7f16\u7801\u201d\uff1f\u00a0PolarDB for PostgreSQL \u4ece\u5165\u95e8\u5230\u5b9e\u6218\u00a0PolarDB for PostgreSQL\u662f\u963f\u91cc\u4e91\u81ea\u4e3b\u7814\u53d1\u7684\u4e00\u6b3e\u4e91\u539f\u751f\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4ea7\u54c1\uff0c100%\u517c\u5bb9PostgreSQL\uff0c\u91c7\u7528\u57fa\u4e8eShared-Storage\u7684\u5b58\u50a8\u8ba1\u7b97\u5206\u79bb\u67b6\u6784\uff0c\u5177\u6709\u6781\u81f4\u5f39\u6027\u3001\u6beb\u79d2\u7ea7\u5ef6\u8fdf\u3001HTAP\u3001\u4e91\u539f\u751f\u3001\u591a\u6a21\u8ba1\u7b97\u3001\u91d1\u878d\u7ea7\u9ad8\u53ef\u9760\u548c\u9ad8\u53ef\u7528\u7684\u80fd\u529b\uff0c\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u5728\u7ebf\u4e8b\u52a1\u3001\u5b9e\u65f6\u590d\u6742\u8ba1\u7b97\u548c\u67e5\u8be2\u5206\u6790\u3001\u5b9e\u65f6\u56fe\u6587\u641c\u7d22\u3001\u91d1\u878d\u7b49\u4e1a\u52a1\u573a\u666f\u3002\u672c\u4e66\u7531\u963f\u91cc\u4e91\u53ca\u7f51\u6613\u6570\u5e06\u3001\u7f8e\u521b\u79d1\u6280\u3001CUUG\u3001\u6052\u8f89\u4fe1\u8fbe\u7b49\u5f00\u6e90\u751f\u6001\u5408\u4f5c\u4f19\u4f34\u5171\u540c\u51fa\u54c1\uff0c\u4ece\u5b89\u88c5\u90e8\u7f72\u5230\u8fd0\u7ef4\u5b9e\u8df5\u3001\u5f00\u53d1\u5de5\u5177\uff0c\u516b\u5927\u7ae0\u8282\u8f7b\u677e\u5165\u95e8 PolarDB for PostgreSQL \u5f00\u6e90\u6570\u636e\u5e93\u3002\u70b9\u51fb\u8fd9\u91cc\uff0c\u67e5\u770b\u8be6\u60c5\u3002\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=hSwNN8kycitBHUF8AShFyg%3D%3D.FDdXkttcWXz%2B630V1tJcpZrRZR5FTgUP%2FA2xd3DScSrZ68BBr%2BuT%2FJng5YFTKnM1\" rel=\"nofollow\">https:\/\/click.aliyun.com\/m\/10&#8230;<\/a>\u672c\u6587\u4e3a\u963f\u91cc\u4e91\u539f\u521b\u5185\u5bb9\uff0c\u672a\u7ecf\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042552762\">https:\/\/segmentfault.com\/a\/1190000042552762<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u5173\u4e8e\u5e76\u884c\u67e5\u8be2\u7684\u529f\u80fd\u3001\u7279\u6027\u3001\u6280\u672f\u539f\u7406\u7b49\uff0c&#8221;\u5e76\u884c\u67e5\u8be2\u7684\u524d\u4e16\u4eca\u751f&#8221;\u8fd9\u7bc7\u5df2\u505a\u8fc7\u8be6\u7ec6\u7684\u89e3 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006614","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006614"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006614\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}