{"id":10006478,"date":"2022-09-14T13:03:19","date_gmt":"2022-09-14T05:03:19","guid":{"rendered":"https:\/\/ityet.com\/?p=10006478"},"modified":"2022-09-14T13:03:19","modified_gmt":"2022-09-14T05:03:19","slug":"%e6%88%91%ef%bc%8cpolardb%e4%ba%91%e5%8e%9f%e7%94%9f%e6%95%b0%e6%8d%ae%e5%ba%93%ef%bc%8c5%e5%b9%b4%e6%9d%a5%e5%ae%9e%e7%8e%b0%e8%bf%99%e4%ba%9b%e9%87%8d%e7%a3%85%e6%8a%80%e6%9c%af%e5%88%9b%e6%96%b0","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006478","title":{"rendered":"\u6211\uff0cPolarDB\u4e91\u539f\u751f\u6570\u636e\u5e93\uff0c5\u5e74\u6765\u5b9e\u73b0\u8fd9\u4e9b\u91cd\u78c5\u6280\u672f\u521b\u65b0"},"content":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u8fc7\u53bb5\u5e74\uff0c\u963f\u91cc\u4e91\u9488\u5bf9PolarDB\u8fdb\u884c\u4e86\u8bf8\u591a\u521b\u65b0\uff0c\u901a\u8fc7\u91c7\u7528\u5b58\u50a8\u8ba1\u7b97\u5206\u79bb\u3001\u8f6f\u786c\u4e00\u4f53\u5316\u8bbe\u8ba1\uff0cPolarDB\u5b9e\u73b0\u6210\u672c\u4ec5\u4e3a\u4f20\u7edf\u5546\u4e1a\u6570\u636e\u5e93\u7684\u5341\u5206\u4e4b\u4e00\u3002\u6240\u5b9e\u73b0\u7684\u8ba1\u7b97\u3001\u5185\u5b58\u4e0e\u5b58\u50a8\u8d44\u6e90\u7684\u201c\u4e09\u5c42\u89e3\u8026\u201d\u67b6\u6784\u3001\u591a\u4e3b\u591a\u5199\u3001\u57fa\u4e8eIMCI\uff08\u5185\u5b58\u5217\u5b58\u7d22\u5f15\uff09\u7684HTAP\u3001Serverless\u7b49\u529f\u80fd\u5df2\u662f\u5168\u7403\u9996\u521b\u6216\u4e1a\u5185\u9886\u5148\u7684\u6280\u672f\u3002\u4ecePolarDB\u53d1\u5e03\u4ee5\u6765\uff0c\u5b83\u5728\u6280\u672f\u548c\u5546\u4e1a\u5316\u4e0a\u90fd\u83b7\u5f97\u4e86\u8fc5\u731b\u53d1\u5c55\uff0c\u5982\u4eca\u5df2\u7ecf\u6210\u4e3a\u963f\u91cc\u4e91\u6570\u636e\u5e93\u4ea7\u54c1\u5bb6\u65cf\u4e2d\u6700\u95ea\u8000\u7684\u4ea7\u54c1\u3002\u672c\u6587\u6211\u4eec\u5c06\u5411\u5927\u5bb6\u8be6\u7ec6\u4ecb\u7ecd\uff0cPolarDB\u53d1\u5e035\u5e74\u6765\u6240\u5b9e\u73b0\u7684\u6280\u672f\u521b\u65b0\u3002<br 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Provision\uff0c\u4f7f\u5f97\u7528\u6237\u4e0d\u9700\u8981\u518d\u4e3a\u6570\u636e\u5e93\u89c4\u5212\u5bb9\u91cf\uff0c\u5728\u9ad8\u5cf0\u65f6\u81ea\u52a8\u5347\u914d\u63d0\u5347\u7a33\u5b9a\u6027\uff0c\u5728\u4f4e\u5cf0\u65f6\u81ea\u52a8\u964d\u914d\u964d\u4f4e\u6210\u672c\u3002\u56e0\u6b64\u4e00\u65f6\u95f4\u4e91\u6570\u636e\u5e93\u5382\u5546\u90fd\u7eb7\u7eb7\u63a8\u51fa\u4e86\u81ea\u5df1\u7684Serverless\u5f62\u6001\u3002\u7136\u800c\uff0c\u5f53\u524d\u4e1a\u5185\u7684\u6570\u636e\u5e93Serverless\u5f62\u6001\u5747\u4e3a\u5355\u673aServerless\uff0c\u5176\u5bb9\u91cf\u4e0a\u9650\u53d7\u5230\u4e86\u5f88\u5927\u7684\u9650\u5236\uff088~32 core\uff09\uff0c\u5e76\u4e0d\u80fd\u5f88\u597d\u7684\u5b9e\u73b0\u5176\u9ad8\u5cf0\u65f6\u81ea\u52a8\u5347\u914d\u4ee5\u4fdd\u969c\u7a33\u5b9a\u6027\u7684\u76ee\u6807\uff0c\u4e5f\u9650\u5236\u4e86\u4f01\u4e1a\u7ea7\u5ba2\u6237\u7684\u4f7f\u7528\uff0c\u540c\u65f6\u8bfb\u5199\u8282\u70b9\u81ea\u8eab\u7684\u5347\u964d\u914d\u5bf9\u672c\u8282\u70b9\u7684\u541e\u5410\u540c\u6837\u5b58\u5728\u5f71\u54cd\u3002\u8fd9\u4e9b\u9650\u5236\u7684\u672c\u8d28\u662f\u76ee\u524d\u4e91\u6570\u636e\u5e93\u7684\u65e0\u611f\u8de8\u673a\u5f39\u6027\u548c\u5f3a\u4e00\u81f4\u8de8\u673a\u6269\u5c55\u80fd\u529b\u90fd\u5c1a\u4e0d\u6210\u719f\uff0c\u5bfc\u81f4\u5f53\u524d\u7684Serverless\u53ea\u80fd\u5b9e\u73b0\u5355\u8282\u70b9\u4e0b\u6709\u9650\u7684Serverless\u3002\u8de8\u673a\u5f39\u6027\u7684\u9650\u5236\u662f\u8282\u70b9\u65e0\u6cd5\u8de8\u673a\u8c03\u5ea6\uff0c\u56e0\u6b64\u5355\u8282\u70b9\u5f39\u6027\u4e0a\u9650\u53ea\u80fd\u9650\u5236\u5230\u4e00\u4e2a\u8fdc\u5c0f\u4e8e\u7269\u7406\u673a\u9650\u5236\u7684\u503c\uff1b\u800c\u8de8\u673a\u5f3a\u4e00\u81f4\u8bfb\u6269\u5c55\u7684\u80fd\u529b\u7f3a\u5931\uff0c\u5bfc\u81f4\u5176\u65e0\u6cd5\u901a\u8fc7\u589e\u5220\u5f3a\u4e00\u81f4\u7684\u53ea\u8bfb\u8282\u70b9\u6765\u5b9e\u73b0\u8bfb\u6d41\u91cf\u7684\u5f39\u6027\u3002\u4e3a\u89e3\u51b3\u5355\u673aServerless\u7684\u5c40\u9650\u6027\uff0c\u963f\u91cc\u4e91\u5728\u4e1a\u5185\u7b2c\u4e00\u6b21\u7a81\u7834\u4e86\u8fd9\u4e24\u4e2a\u6280\u672f\u96be\u70b9\uff1a\u57fa\u4e8e\u4e8b\u52a1\u7eed\u4f20\u548c\u79d2\u7ea7\u5207\u6362\u7684\u65e0\u611f\u79d2\u5207\u6280\u672f\uff0c\u89e3\u51b3\u8de8\u673a\u5f39\u6027\u95ee\u9898\uff1b\u6027\u80fd\u65e0\u635f\u7684\u5f3a\u4e00\u81f4\u8bfb\u6280\u672f\uff0c\u7ed3\u5408\u70ed\u8282\u70b9\u6c60\u6280\u672f\uff0c\u89e3\u51b3\u8de8\u673a\u900f\u660e\u8bfb\u6269\u5c55\u95ee\u9898\u3002\u57fa\u4e8e\u4ee5\u4e0a\u6280\u672f\u7a81\u7834\uff0cPolarDB Serverless\u7684\u4e0a\u9650\u89c4\u683c\u7a81\u7834\u4e861000core\uff0c\u5e26\u6765\u4e86\u6570\u91cf\u7ea7\u7684Serverless\u80fd\u529b\u63d0\u5347\uff0c\u4f7f\u5f97Serverless\u6280\u672f\u6709\u4e86\u652f\u6491\u4f01\u4e1a\u7ea7\u4e1a\u52a1\u7684\u80fd\u529b\u3002HTAP\uff1a\u540c\u65f6\u5904\u7406\u4ea4\u6613\u548c\u5206\u6790\u6027\u8d1f\u8f7d\u4f20\u7edf\u9762\u5411OLTP\u573a\u666f\u8bbe\u8ba1\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u4e00\u822c\u4f18\u5316\u76ee\u6807\u662f\u63d0\u5347\u5355\u6838\u6027\u80fd\/\u591a\u6838\u6269\u5c55\u6027\/\u589e\u5f3a\u96c6\u7fa4\u80fd\u529b\u4ee5\u63d0\u5347\u53ef\u7528\u6027\u7b49\uff0c\u5176\u5206\u6790\u6027\u80fd\u5f80\u5f80\u4e0d\u4f73\u3002\u7136\u800c\u771f\u5b9e\u4e1a\u52a1\u7684SQL\u53c8\u5929\u7136\u662fTP\/AP\u6df7\u5408\u7684\uff0c\u5176\u9700\u8981\u4e8b\u52a1\u5904\u7406\u548c\u5b9e\u65f6\u6570\u636e\u5206\u6790\u517c\u5177\u7684HTAP\u7cfb\u7edf\u3002\u9762\u5bf9\u6b64\u95ee\u9898\uff0c\u4f20\u7edf\u65b9\u6848\u662f\u4f7f\u7528\u4e00\u5957\u6570\u636e\u540c\u6b65\u7cfb\u7edf\u4e32\u8054\u8d77\u4e0a\u6e38\u7684TP\u7cfb\u7edf\u548c\u4e0b\u6e38\u7684\u6570\u4ed3\u7cfb\u7edf\uff0c\u5f62\u6210\u4e00\u5957\u642d\u79ef\u6728\u7684\u65b9\u6848\uff0c\u7528\u591a\u5957\u7cfb\u7edf\u7684\u7ec4\u5408\u6765\u5b8c\u6210\u4efb\u52a1\u3002\u5728\u4e91\u6570\u636e\u5e93\u65f6\u4ee3\u8fd9\u79cd\u67b6\u6784\u56e0\u4e3a\u4e32\u8054\u4e86OLTP\u6570\u636e\u5e93\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0cOLAP\u6570\u636e\u5e93\u4e09\u5957\u7cfb\u7edf\uff0c\u4e0a\u4e0b\u6e38\u534f\u8bae\u4e0d\u517c\u5bb9\uff0c\u8fd0\u884c\u7ef4\u62a4\u590d\u6742\u3002\u5728\u4e91\u4e0a\u5f88\u96be\u89c4\u6a21\u90e8\u7f72\u4ee5\u6ee1\u8db3\u5404\u79cd\u5ba2\u6237\u7684\u9700\u6c42\u3002\u9488\u5bf9\u8fd9\u4e9b\u95ee\u9898\uff0c\u5728PolarDB\u4e91\u539f\u751f\u6570\u636e\u5e93\u9886\u57df\u7684\u6280\u672f\u79ef\u7d2f\u57fa\u7840\u4e0a\uff0c\u963f\u91cc\u4e91\u5728PolarDB\u4e0a\u63a8\u51fa\u4e86In-Memory Column Index\u529f\u80fd\uff0c\u5176\u4e3aPolarDB\u5e26\u6765\u5217\u5f0f\u5b58\u50a8\u4ee5\u53ca\u5185\u5b58\u8ba1\u7b97\u80fd\u529b\uff0c\u8ba9\u7528\u6237\u53ef\u4ee5\u5728\u4e00\u5957PolarDB\u6570\u636e\u5e93\u4e0a\u540c\u65f6\u8fd0\u884cOLTP\u548cOLAP\u578b\u6df7\u5408\u8d1f\u8f7d\uff0c\u5728\u4fdd\u8bc1\u73b0\u6709PolarDB\u4f18\u5f02\u7684OLTP\u6027\u80fd\u7684\u540c\u65f6\uff0c\u5927\u5e45\u63d0\u5347PolarDB\u5728\u5927\u6570\u636e\u91cf\u4e0a\u8fd0\u884c\u590d\u6742\u67e5\u8be2\u7684\u6027\u80fd\uff0c\u8ba9PolarDB \u771f\u6b63\u6210\u4e3a\u4e00\u6b3eHTAP\u6570\u636e\u5e93\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042476699\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>PolarDB HTAP\u5305\u542b\u5982\u4e0b\u51e0\u4e2a\u5173\u952e\u6280\u672f\u521b\u65b0\uff1aPolarDB\u5b58\u50a8\u5f15\u64ce\u65b0\u589e\u5bf9\u5217\u5f0f\u7d22\u5f15\uff08Columnar Index\uff09\u7684\u652f\u6301\uff0c\u7528\u6237\u53ef\u4ee5\u9009\u62e9\u901a\u8fc7DDL\u5c06\u4e00\u5f20\u8868\u7684\u5168\u90e8\u5217\u6216\u8005\u90e8\u5206\u5217\u521b\u5efa\u4e3a\u5217\u7d22\u5f15\uff0c\u540c\u65f6\u5217\u7d22\u5f15\u91c7\u7528\u5217\u538b\u7f29\u5b58\u50a8\uff0c\u5176\u5b58\u50a8\u7a7a\u95f4\u6d88\u8017\u4f1a\u8fdc\u5c0f\u4e8e\u884c\u5b58\u683c\u5f0f\u3002\u5728PolarDB\u7684SQL\u6267\u884c\u5668\u5c42\uff0c\u963f\u91cc\u4e91\u91cd\u5199\u4e86\u4e00\u5957\u9762\u5411\u5217\u5b58\u7684\u6267\u884c\u5668\u5f15\u64ce\u6846\u67b6(Column-oriented), \u8be5\u6267\u884c\u5668\u6846\u67b6\u5145\u5206\u5229\u7528\u5217\u5f0f\u5b58\u50a8\u7684\u4f18\u52bf\uff0c\u4f7f\u7528\u5411\u91cf\u5316\u6267\u884c\u65b9\u6cd5\u63d0\u5347\u7b97\u5b50\u5904\u7406\u6d77\u91cf\u6570\u636e\u7684\u6548\u7387\u3002\u540c\u65f6\u5145\u5206\u53d1\u6325\u73b0\u4ee3CPU\u7684SIMD\u6307\u4ee4\u80fd\u529b\uff0c\u63d0\u5347CPU\u5355\u6838\u5fc3\u5904\u7406\u6570\u636e\u7684\u541e\u5410\uff0c\u4e14\u6240\u6709\u5173\u952e\u7b97\u5b50\u5747\u652f\u6301\u5e76\u884c\u6267\u884c\u3002\u5728\u5217\u5f0f\u5b58\u50a8\u4e0a\uff0c\u65b0\u7684\u6267\u884c\u5668\u5bf9\u6bd4MySQL\u539f\u6709\u7684\u884c\u5b58\u6267\u884c\u5668\u6027\u6709\u51e0\u4e2a\u6570\u91cf\u7ea7\u7684\u6027\u80fd\u63d0\u5347\u3002\u652f\u6301\u884c\u5217\u6df7\u5408\u6267\u884c\u7684\u4f18\u5316\u5668\u6846\u67b6\uff0c\u8be5\u4f18\u5316\u5668\u4f1a\u6839\u636e\u517c\u5bb9\u6027\u53ca\u6267\u884c\u8ba1\u5212\u4ee3\u4ef7\u4e24\u65b9\u9762\u7684\u56e0\u7d20\uff0c\u4ee5\u9009\u4e2d\u6700\u4f18\u7684\u6267\u884c\u8def\u5f84\u3002\u540c\u65f6\u963f\u91cc\u4e91\u8fd8\u5145\u5206\u5229\u7528\u4e86PolarDB\u4e91\u539f\u751f\u6570\u636e\u5e93\u7684\u6280\u672f\u4f18\u52bf\uff0c\u652f\u6301HTAP\u8282\u70b9\u7684\u89c4\u683c\u5f02\u6784\u53ca\u6309\u9700\u5f39\u6027\uff08Serverless\uff09\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e00\u4f53\u5316HTAP\u4f53\u9a8c\u7684\u540c\u65f6\u517c\u5177\u6781\u81f4\u7684\u6027\u4ef7\u6bd4\u3002\u5e76\u884c\u67e5\u8be2\uff1a\u7a81\u7834\u5355\u8282\u70b9\u7684\u8d44\u6e90\u548c\u6027\u80fd\u74f6\u9888\u4f20\u7edf\u7684\u57fa\u4e8eMySQL\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5728\u90e8\u7f72\u5230\u4e91\u4e0a\u540e\uff0c\u4f9d\u7136\u91c7\u7528\u4e86\u4e3b\u5907\u590d\u5236\u7684\u6570\u636e\u540c\u6b65\u6a21\u5f0f\u6765\u63d0\u4f9b\u5b9e\u4f8b\u7684\u9ad8\u53ef\u9760\u548c\u9ad8\u53ef\u7528\uff0c\u4f46\u57fa\u4e8e\u903b\u8f91\u590d\u5236\u5bfc\u81f4\u5b9e\u4f8b\u5ef6\u8fdf\u589e\u5927\u3001\u591a\u4efd\u5b58\u50a8\u7b49\u95ee\u9898\u3002PolarDB\u901a\u8fc7\u5171\u4eab\u5b58\u50a8\u548c\u7269\u7406\u590d\u5236\u5b9e\u73b0\u4e86\u4e91\u4e0a\u7684\u8ba1\u5b58\u5206\u79bb\u548c\u8d44\u6e90\u6c60\u5316\u80fd\u529b\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e86\u6700\u4f18\u7684\u5f39\u6027\u80fd\u529b\u548c\u6027\u4ef7\u6bd4\u3002\u800c\u4ece\u7ebf\u4e0a\u7684\u957f\u671f\u8fd0\u7ef4\u53ef\u4ee5\u53d1\u73b0\uff0c\u4e91\u4e0a\u7528\u6237\u5b9e\u4f8b\u5bf9CPU\u8d44\u6e90\u7684\u5e73\u5747\u5229\u7528\u7387\u662f\u8f83\u4f4e\u7684\uff0c\u540c\u65f6MySQL\u5bf9\u67e5\u8be2\u7684\u5355\u7ebf\u7a0b\u5904\u7406\u65b9\u5f0f\u53c8\u65e0\u6cd5\u6ee1\u8db3\u4e1a\u52a1\u4e0a\u57fa\u4e8e\u6d77\u91cf\u6570\u636e\u7684\u5b9e\u65f6\u5206\u6790\u9700\u6c42\uff0c\u8fd9\u9020\u6210\u4e86\u6781\u5927\u7684\u8d44\u6e90\u6d6a\u8d39\u3002\u4e3a\u6b64\u963f\u91cc\u4e91\u63a8\u51fa\u4e86\u8282\u70b9\u5185\u4ee5\u53ca\u8de8\u8282\u70b9\u5e76\u884c\u67e5\u8be2(Parallel Query)\u529f\u80fd\uff0c\u9488\u5bf9\u6027\u7684\u5229\u7528\u591a\u6838CPU\u5e76\u884c\u8ba1\u7b97\u6765\u63d0\u5347\u67e5\u8be2\u54cd\u5e94\u901f\u5ea6\u3002\u4f46\u968f\u7740\u5171\u4eab\u5b58\u50a8\u5c42\u7684\u6570\u636e\u91cf\u8fdb\u4e00\u6b65\u589e\u957f\uff0c\u5355\u673a\u7684\u6269\u5c55\u80fd\u529b\u5c06\u9047\u5230\u74f6\u9888\uff0c\u5305\u62ecCPU\u3001Memory\u548cIO\u7b49\uff0c\u4f20\u7edf\u6570\u636e\u5e93\u901a\u8fc7share nothing\u7684\u5206\u7247\u67b6\u6784\u548cMPP\u8ba1\u7b97\u5f15\u64ce\u6765\u7a81\u7834\u5355\u673a\u7684\u8d44\u6e90\u74f6\u9888\uff0c\u4f46\u8fd9\u7834\u574f\u4e86\u4e91\u4e0a\u8ba1\u5b58\u5206\u79bb\u5e26\u6765\u7684\u72ec\u7acb\u6269\u5c55\u6027\u548c\u6781\u81f4\u5f39\u6027\u80fd\u529b\uff0c\u6709\u6096\u4e8e\u73b0\u4ee3\u4e91\u539f\u751f\u6570\u636e\u5e93\u7684\u53d1\u5c55\u8d8b\u52bf\u3002PolarDB\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u65b9\u6848\u662f\u66f4\u4e3a\u5148\u8fdb\u7684\u8ba1\u7b97\u3001\u5185\u5b58\u3001\u5b58\u50a8&#8221;\u4e09\u5c42\u89e3\u8026&#8221;\u6a21\u5f0f\uff0c\u901a\u8fc7\u5c06\u8d44\u6e90\u8fdb\u4e00\u6b65\u62c6\u89e3\uff0c\u5728\u5404\u4e2a\u5c42\u9762\u4e0a\u5404\u81ea\u72ec\u7acb\u6269\u5c55\u3002\u800c\u9488\u5bf9\u5927\u6570\u636e\u91cf\u5206\u6790\u67e5\u8be2\uff0c\u6211\u4eec\u5728\u8ba1\u7b97\u8fd9\u4e00\u5c42\u5c42\u57fa\u4e8eParallel Query\u8fdb\u4e00\u6b65\u6f14\u8fdb\uff0c\u63a8\u51fa\u4e86\u57fa\u4e8e\u5171\u4eab\u5b58\u50a8\u7684\u5206\u5e03\u5f0f\u5f39\u6027\u5e76\u884c\u67e5\u8be2(Elastic Parallel Query)\uff0c\u901a\u8fc7\u8282\u70b9\u95f4+\u8282\u70b9\u5185\u4e24\u5c42\u5e76\u884c\u7684\u7ed3\u5408\u4ee5\u53ca\u57fa\u4e8e\u5206\u5e03\u5f0f\u8d44\u6e90\u89c6\u56fe\u7684\u667a\u80fd\u8c03\u5ea6\u7b56\u7565\uff0c\u6253\u901a\u4e86\u96c6\u7fa4\u5185\u7684\u591a\u8282\u70b9\u8ba1\u7b97\u8d44\u6e90\uff0c\u4e0e\u4f20\u7edf\u7684\u56fa\u5316\u7684MPP\u67b6\u6784\u76f8\u6bd4\uff0c\u8fd9\u5e26\u6765\u4e86\u591a\u65b9\u9762\u7684\u6280\u672f\u548c\u6210\u672c\u4f18\u52bf\uff1a\u901a\u8fc7\u591a\u7c92\u5ea6\u7684\u5e76\u884c\uff0c\u66f4\u5145\u5206\u7684\u5229\u7528\u96c6\u7fa4\u7ea7\u7684\u8ba1\u7b97\u8d44\u6e90\uff0c\u7a81\u7834\u5355\u8282\u70b9\u7684\u8d44\u6e90\u548c\u6027\u80fd\u74f6\u9888\uff0cPolarDB\u5728\u5229\u7528\u5e76\u884c\u67e5\u8be2\u63d0\u5347CPU\u5229\u7528\u7387\u7684\u540c\u65f6\uff0c\u4e5f\u5f00\u53d1\u4e86\u5e76\u884cDDL\u7b49\u80fd\u529b\uff0c\u5927\u5927\u7f29\u77ed\u4e86DDL\u7684\u65f6\u95f4\uff0c\u89e3\u51b3\u4e86\u4e00\u4e9b\u5927\u8868\u7528\u6237\u7684\u4e00\u4e2a\u91cd\u8981\u75db\u70b9\uff0c\u5b9e\u73b0\u548c\u4f20\u7edfMPP\u7cfb\u7edf\u76f8\u540c\u751a\u81f3\u66f4\u4f18\u7684\u6781\u81f4\u67e5\u8be2\u6027\u80fd\u3002\u57fa\u4e8e\u5206\u5e03\u5f0f\u7684\u5168\u5c40\u8d44\u6e90\u89c6\u56fe\uff0c\u5e76\u7ed3\u5408\u6570\u636e\u7684\u4eb2\u548c\u6027\u7279\u5f81\uff0c\u5bf9\u67e5\u8be2\u5185\u7684\u5b50\u8ba1\u7b97\u4efb\u52a1\u8fdb\u884c\u667a\u80fd\u8c03\u5ea6\uff0c\u5728\u5c3d\u53ef\u80fd\u907f\u514dIO\u7684\u60c5\u51b5\u4e0b\u5b9e\u73b0\u5404\u8282\u70b9\u8ba1\u7b97\u8d44\u6e90\u7684\u5747\u8861\u5229\u7528\uff0c\u907f\u514d\u5c40\u90e8\u70ed\u70b9\u5e26\u6765\u7684\u6027\u80fd\u548c\u7ef4\u62a4\u95ee\u9898\u3002\u4e0e\u4e91\u4e0a\u7684\u81ea\u52a8\u5f39\u6027\u65e0\u7f1d\u7ed3\u5408\uff0c\u968f\u7740\u5b9e\u4f8b\u8ba1\u7b97\u5c42\u7684scale up\/scale out\u81ea\u9002\u5e94\u7684\u8c03\u6574\u5e76\u884c\u8ba1\u7b97\u7b56\u7565\uff0c\u65e2\u6ee1\u8db3\u4e86\u7528\u6237\u7684\u6210\u672c\u548c\u6027\u80fd\u9700\u6c42\uff0c\u53c8\u65e0\u9700\u989d\u5916\u7684\u914d\u7f6e\u7ef4\u62a4\u52a8\u4f5c\u3002\u7075\u6d3b\u63a7\u5236\u5b9e\u4f8b\u7ea7\u522b\u7684\u8ba1\u7b97\u8d44\u6e90\u62d3\u6251\uff0c\u901a\u8fc7\u4e0d\u540c\u63a5\u5165\u5730\u5740\uff08\u5b50\u96c6\u7fa4\uff09\uff0c\u5b9e\u73b0\u4e0d\u540c\u4e1a\u52a1\u7684\u76f8\u4e92\u9694\u79bb\u548c\u5404\u81ea\u72ec\u7acb\u914d\u7f6e\uff0c\u6ee1\u8db3\u5177\u6709\u4e0d\u540c\u7279\u6027\u7684\u67e5\u8be2\u4e1a\u52a1\u9700\u6c42\u3002\u67b6\u6784\u6f14\u8fdb\u7684\u793a\u610f\u56fe\u5982\u4e0b\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042476700\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u5206\u5e03\u5f0f\uff1a\u5b9e\u73b0\u900f\u660e\u5206\u5e03\u5f0f\u4f53\u9a8c<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042476701\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u6570\u636e\u5e93\u7ecf\u5386\u8fc7\u53bb40\u591a\u5e74\u7684\u53d1\u5c55\uff0c\u968f\u7740\u4e92\u8054\u7f51\u3001\u5927\u6570\u636e\u7684\u98de\u901f\u53d1\u5c55\uff0c\u5355\u53f0\u52a1\u5668\u4e0a\u7684\u6027\u80fd\u6781\u9650\u5df2\u7ecf\u6162\u6162\u663e\u9732\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6280\u672f\u4eba\u5458\u9010\u6e10\u5f00\u59cb\u63a2\u7d22\u6570\u636e\u5e93\u7684\u6269\u5c55\u80fd\u529b\uff0c\u76ee\u524d\u6574\u4f53\u6269\u5c55\u67b6\u6784\u53c8\u4e24\u79cd\u5f62\u6001\uff1a\u57fa\u4e8e\u5171\u4eab\u5b58\u50a8\u7684share-storage\u67b6\u6784\u3001\u4ee5\u53ca\u57fa\u4e8eshare-nothing\u7684\u5206\u5e03\u5f0f\u67b6\u6784\uff0c\u8fd9\u4e24\u79cd\u67b6\u6784\u5206\u522b\u4ee3\u8868\u4e86\u4e24\u4e2a\u4e0d\u540c\u7684\u6269\u5c55\u601d\u8def\uff0c\u6709\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\u3002\u57fa\u4e8escale-up\u7684\u5355\u673a\u6269\u5c55\u67b6\u6784\uff0c\u5728\u9762\u5411\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u5bb9\u6613\u9047\u5230\u5355\u673a\u6269\u5c55\u6027\u7684\u5929\u82b1\u677f\uff0c\u56e0\u6b64\u57282019\u5e74\u5f00\u59cb\uff0cPolarDB\u57fa\u4e8eshare-nothing\u7684\u5206\u5e03\u5f0f\u67b6\u6784\uff0c\u6b63\u5f0f\u63a8\u51fa\u4e86\u4e91\u539f\u751f\u5206\u5e03\u5f0f\u7248(PolarDB-X)\uff0c\u652f\u6301\u591a\u5199\u591a\u8bfb\u3001\u4ee5\u53ca\u4f4e\u6210\u672c\u7684\u51b7\u70ed\u5206\u79bb\u5206\u5c42\u67b6\u6784\u3002PolarDB\u4e91\u539f\u751f\u5206\u5e03\u5f0f\u7248\uff08PolarDB-X\uff09\u4f5c\u4e3a\u4e00\u6b3e\u57fa\u4e8e\u539f\u751fMySQL\u7684\u4e91\u539f\u751f\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff0c\u9ad8\u5ea6\u517c\u5bb9MySQL\u7684\u534f\u8bae\u548c\u5f00\u6e90\u751f\u6001\uff0c\u5f15\u5165Paxos\u591a\u6570\u6d3e\u5171\u8bc6\u534f\u8bae\uff0c\u805a\u7126\u56fd\u4ea7\u5316MySQL\u66ff\u4ee3\u3001\u5206\u5e03\u5f0f\u7ebf\u6027\u6269\u5c55\u3001\u4ee5\u53caHTAP\u6df7\u5408\u8d1f\u8f7d\u7b49\u573a\u666f\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042476702\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>PolarDB\u4e91\u539f\u751f\u5206\u5e03\u5f0f\u7248\uff08PolarDB-X\uff09\u5305\u542b\u5982\u4e0b\u51e0\u4e2a\u5173\u952e\u6280\u672f\u521b\u65b0\uff1a1.\u900f\u660e\u5206\u5e03\u5f0f\u4f53\u9a8c\uff0c\u5f15\u5165\u81ea\u52a8\u6570\u636e\u5206\u533a\u4e0e\u6570\u636e\u81ea\u52a8\u4eb2\u548c\u6027\u805a\u96c6\u6280\u672f\uff0c\u81ea\u52a8\u8bc6\u522b\u6570\u636e\u7684\u4e1a\u52a1\u5c5e\u6027\u8fdb\u884c\u76f8\u5173\u6027\u7ed1\u5b9a\u548c\u7edf\u4e00\u8c03\u5ea6\uff0c\u5728\u63d0\u5347\u6570\u636e\u5e93\u7ebf\u6027\u6269\u5c55\u80fd\u529b\u7684\u540c\u65f6\uff0c\u907f\u514d\u56e0\u4e3a\u8de8\u5206\u533a\u7684\u4e8b\u52a1\u548c\u590d\u6742\u67e5\u8be2\u5e26\u6765\u7684\u6027\u80fd\u5f00\u9500\uff0c\u6700\u5927\u7a0b\u5ea6\u5c06\u4e8b\u52a1\u6d89\u53ca\u8303\u56f4\u5c40\u9650\u5728\u5355\u4e2a\u7269\u7406\u8282\u70b9\uff0c\u4ee5\u53ca\u6700\u5927\u5316\u4e0b\u63a8\u8ba1\u7b97\u7b97\u5b50\u51cf\u5c11\u6570\u636e\u4ea4\u6362\u3002\u7ed3\u5408\u5168\u5c40\u4e8c\u7ea7\u7d22\u5f15\u3001\u5728\u7ebf\u6570\u636e\u53d8\u66f4\uff0c\u505a\u5230\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u63a5\u8fd1\u5355\u673a\u6570\u636e\u5e93\u4f53\u9a8c\uff0c\u6253\u7834\u4e86\u5206\u5e03\u5f0f\u80fd\u529b\u5e94\u7528\u73b0\u5b9e\u573a\u666f\u4e2d\u7684\u5173\u952e\u969c\u788d\u30022.\u51b7\u70ed\u5206\u79bb\u5b58\u50a8\u67b6\u6784\uff0c\u5f15\u5165\u6570\u636e\u5206\u533a\u7684Time-to-Live(TTL)\u7b56\u7565\uff0c\u968f\u7740\u65f6\u95f4\u63a8\u8fdb\uff0c\u53ef\u4ee5\u5c06\u5386\u53f2\u4e0d\u5e38\u8bbf\u95ee\u7684\u51b7\u6570\u636e\u8fdb\u884c\u5b9a\u671f\u5f52\u6863\uff0cPolarDB\u5206\u5e03\u5f0f\u7ed3\u5408\u4e91\u5bf9\u8c61\u5b58\u50a8OSS\u4f5c\u4e3a\u51b7\u5b58\u50a8\u4ecb\u8d28\uff0c\u91c7\u7528\u7f16\u7801\u538b\u7f29\u3001\u4ee5\u53caOSS\u672c\u8eab\u7684\u6210\u672c\u4f18\u52bf\uff0c\u51b7\u6570\u636e\u4ec5\u6709MySQL InnoDB\u5728\u7ebf\u6570\u636e1\/20\u7684\u5b58\u50a8\u6210\u672c\uff0c\u540c\u65f6\u63d0\u4f9b\u5355\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\u7684\u900f\u660e\u4f7f\u7528\u4f53\u9a8c\uff0c\u7edf\u4e00SQL\u8bbf\u95ee\u3001\u5907\u4efd\u64cd\u4f5c\u7b49\u30023.\u5168\u9762\u62e5\u62b1\u56fd\u4ea7\u5316\uff0c\u57fa\u4e8e\u5168\u5185\u6838\u5f00\u6e90\u7684\u7b56\u7565\uff0c\u575a\u6301\u57fa\u4e8eMySQL\u7684\u654f\u6377\u53ef\u63a7\u8def\u7ebf\uff0c\u76ee\u524dPolarDB\u5df2\u7ecf\u987a\u5229\u9ad8\u5206\u901a\u8fc7\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7684\u91d1\u878d\u884c\u4e1a\u6807\u51c6\u8ba4\u8bc1\u3001\u4fe1\u901a\u9662\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6027\u80fd\u548c\u9ad8\u53ef\u7528\u8ba4\u8bc1\u7b49\u3002\u9664\u4e86\u6ee1\u8db3\u516c\u6709\u4e91\u7684\u4ea4\u4ed8\u5916\uff0cPolarDB\u53ef\u4ee5\u9762\u5411\u4f20\u7edf\u91d1\u878d\u3001\u653f\u5e9c\u884c\u4e1a\u7684\u79c1\u6709\u4e91\u4ea4\u4ed8\u3001\u4ee5\u53ca\u57fa\u4e8e\u5f00\u6e90\u5185\u6838\u7684\u7eaf\u8f6f\u90e8\u7f72\u80fd\u529b\uff0c\u5168\u9762\u652f\u6301\u6570\u636e\u5e93\u7684\u591a\u573a\u666f\u3001\u591a\u5f62\u6001\u7684\u4ea4\u4ed8\u80fd\u529b\u3002PolarDB\u4e91\u539f\u751f\u5206\u5e03\u5f0f\u7248\uff08PolarDB-X\uff09\u7684\u6570\u636e\u5e93\u5f62\u6001\uff0c\u7ed3\u5408\u4e91\u539f\u751f+\u5206\u5e03\u5f0f+\u56fd\u4ea7\u5316\u7684\u6280\u672f\uff0c\u672a\u6765\u4e5f\u4f1a\u8fdb\u4e00\u6b65\u878d\u5408HTAP\u6df7\u5408\u8d1f\u8f7d\u80fd\u529b\uff0c\u5f15\u5165\u884c\u5217\u6df7\u5b58\u67b6\u6784\uff0c\u66f4\u597d\u7684\u6ee1\u8db3\u6570\u636e\u5b9e\u65f6\u6027\u7684\u8981\u6c42\u3002\u6027\u80fd\u6f14\u8fdb\uff1a\u63d0\u51fa\u4e00\u7cfb\u5217\u4f18\u5316\u65b9\u6cd5\u8bbe\u8ba1\u4e4b\u521d\uff0cPolarDB\u7684\u7406\u5ff5\u5c31\u662f\u4e3a\u4e91\u4e0a\u7528\u6237\u63d0\u4f9b\u5177\u5907\u6781\u81f4\u5f39\u6027\u3001\u9ad8\u6027\u80fd\u3001\u6d77\u91cf\u5b58\u50a8\u3001\u5b89\u5168\u53ef\u9760\u7684\u6570\u636e\u5e93\u670d\u52a1\u3002PolarDB\u91c7\u7528\u8ba1\u7b97\u548c\u5b58\u50a8\u5206\u79bb\u7684\u67b6\u6784\uff0c\u901a\u8fc7\u7269\u7406\u590d\u5236\u6280\u672f\u548c\u5171\u4eab\u5b58\u50a8\u67b6\u6784\uff0c\u5728\u6ee1\u8db3\u4e1a\u52a1\u5bb9\u91cf\u5f39\u6027\u6269\u5c55\u9700\u6c42\u7684\u540c\u65f6\u6781\u5927\u7684\u964d\u4f4e\u4e86\u7528\u6237\u7684\u5b58\u50a8\u6210\u672c\u3002\u5728\u8bbe\u8ba1\u4e0a\uff0cPolarDB\u65e2\u878d\u5408\u4e86\u5546\u4e1a\u6570\u636e\u5e93\u7a33\u5b9a\u53ef\u9760\u3001\u9ad8\u6027\u80fd\u3001\u53ef\u6269\u5c55\u7684\u7279\u5f81\uff0c\u53c8\u5177\u6709\u5f00\u6e90\u4e91\u6570\u636e\u5e93\u7b80\u5355\u5f00\u653e\u3001\u81ea\u6211\u8fed\u4ee3\u7684\u4f18\u52bf\u3002\u4f9d\u6258\u4e8e\u963f\u91cc\u4e91\u5148\u8fdb\u53ef\u9760\u7684\u786c\u4ef6\u5e73\u53f0\uff0cPolarDB\u91c7\u7528RoCE RDMA\u7f51\u7edc\u30013DXpoint\u5b58\u50a8\u4ecb\u8d28\u7b49\u5148\u8fdb\u6280\u672f\uff0c\u5e76\u9762\u5411\u65b0\u786c\u4ef6\u67b6\u6784\u5b9e\u73b0\u8f6f\u786c\u4e00\u4f53\u4f18\u5316\u3002\u4ece\u6570\u636e\u5e93\u5185\u6838\u3001\u6587\u4ef6\u7cfb\u7edf\u5230\u7f51\u7edc\u901a\u8baf\u534f\u8bae\u548c\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0cPolarDB\u5b9e\u73b0\u4e86\u7eb5\u8d2f\u8f6f\u4ef6\u6808\u5404\u5c42\u6b21\u7684\u6df1\u5ea6\u4f18\u5316\u3002\u4ec5\u4ec5\u6784\u5efa\u9ad8\u6027\u80fd\u786c\u4ef6\u5e95\u5ea7\u5e76\u4e0d\u80fd\u5b8c\u5168\u89e3\u51b3\u4e91\u539f\u751f\u6570\u636e\u5e93\u7684\u6027\u80fd\u95ee\u9898\u3002\u4f8b\u5982\u5373\u4fbf\u62e5\u6709\u9ad8\u541e\u5410\u7684RDMA\u7f51\u7edc\u4f46\u805a\u5408\u5e26\u5bbd\u96be\u4ee5\u5145\u5206\u5229\u7528\uff1b\u8fdc\u7aef\u8282\u70b9I\/O\u8bbf\u95ee\u3001\u591a\u526f\u672c\u6301\u4e45\u5316\u7b49\u8981\u6c42\u4f7f\u5f97\u4e91\u5b58\u50a8I\/O\u5ef6\u65f6\u8fdc\u9ad8\u4e8e\u672c\u5730\u5b58\u50a8\uff1b\u53c8\u6bd4\u5982\u66f4\u957f\u7684\u6570\u636e\u94fe\u8def\u4e2d\u6709\u66f4\u591a\u7684\u6392\u961f\uff0c\u5bfc\u81f4I\/O\u95f4\u7684\u9694\u79bb\u6027\u53d8\u4f4e\uff1b\u5171\u4eab\u5b58\u50a8\u67b6\u6784cache concurrence\u4ee3\u4ef7\u7b49\u3002\u9488\u5bf9\u4e91\u539f\u751f\u6570\u636e\u5e93\u9762\u4e34\u7684\u6027\u80fd\u6311\u6218\uff0cPolarDB\u7684\u5b58\u50a8\u5f15\u64ce\u63d0\u51fa\u4e86\u4e00\u7cfb\u5217\u4f18\u5316\u65b9\u6cd5\uff1a\u5e76\u884c\u5316\u591a\u4efb\u52a1\uff1a\u4f8b\u5982\u5bf9\u96c6\u4e2dLog buffer\u6309Page Partition\u5206\u7247\uff0c\u5b9e\u73b0\u5e76\u884c\u5199\u5165\u5e76\u57fa\u4e8e\u5206\u7247\u8fdb\u884c\u5e76\u884cRecovery\u3002\u9884\u53d6\u548c\u8bfb\u53d6\u88c1\u526a\uff1a\u4f8b\u5982\u901a\u8fc7\u6536\u96c6\u5e76\u805a\u5408\u539f\u5206\u6563meta\u81f3\u7edf\u4e00\u7684superblock\uff0c\u5c06\u591a\u4e2aI\/O\u5408\u4e00\u5b9e\u73b0fast validating\uff1b\u901a\u8fc7\u9884\u8bfb\u5229\u7528\u805a\u5408\u8bfb\u5e26\u5bbd\u3001\u51cf\u5c11\u8bfb\u4efb\u52a1\u5ef6\u65f6\u7b49\u3002\u9501\u4f18\u5316\uff1a\u9488\u5bf9\u7cfb\u7edf\u74f6\u9888\uff0c\u5b9e\u73b0\u65e0\u9501\u5237\u810f\u3001\u57fa\u4e8eblink-tree\u7684\u65e0\u9501SMO\u7b49\u3002\u8bbf\u95ee\u6253\u6563\u548c\u4f18\u5148\u7ea7\u8c03\u5ea6\uff1a\u4f8b\u5982\u5c06\u5355\u4e2a\u5927I\/O\u5e76\u53d1\u5206\u6563\u81f3\u4e0d\u540c\u5b58\u50a8\u8282\u70b9\u5206\u6563\u8bbf\u95ee\uff0c\u5145\u5206\u5229\u7528\u4e91\u5b58\u50a8\u805a\u5408\u5e26\u5bbd\uff1b\u5728DB\u5c42\u9762\u5bf9\u4e0d\u540cI\/O\u8fdb\u884c\u6253\u6807\u3001\u8c03\u5ea6\u4f18\u5148\u7ea7\uff0c\u6d88\u9664\u957f\u94fe\u8def\u3001\u4f4e\u9694\u79bbI\/O\u4efb\u52a1\u7684\u5f71\u54cd\u3002\u901a\u8fc7Bypassing Caches\u6765\u907f\u514d\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u7684cache 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