{"id":10005997,"date":"2022-07-22T19:36:45","date_gmt":"2022-07-22T11:36:45","guid":{"rendered":"https:\/\/ityet.com\/?p=10005997"},"modified":"2022-07-22T19:36:45","modified_gmt":"2022-07-22T11:36:45","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e6%b8%b8%e6%88%8f%e8%a1%8c%e4%b8%9a%e5%96%9c%e6%ac%a2%e7%94%a8polardb","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10005997","title":{"rendered":"\u4e3a\u4ec0\u4e48\u6e38\u620f\u884c\u4e1a\u559c\u6b22\u7528PolarDB"},"content":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0PolarDB \u5728\u6e38\u620f\u884c\u4e1a\u7684\u6700\u4f73\u5b9e\u8df5\u4e3a\u4ec0\u4e48\u6e38\u620f\u884c\u4e1a\u559c\u6b22\u7528PolarDB\u6e38\u620f\u884c\u4e1a\u75db\u70b9\u5728\u6211\u770b\u6765, \u4e0d\u540c\u884c\u4e1a\u5bf9\u6570\u636e\u5e93\u4f7f\u7528\u6709\u5de8\u5927\u7684\u5dee\u522b. \u6bd4\u5982\u6e38\u620f\u884c\u4e1a\u6ca1\u6709\u590d\u6742\u7684\u4e8b\u52a1\u4ea4\u6613\u573a\u666f, \u4ed6\u6709\u4e00\u4e2a\u975e\u5e38\u5927\u7684blob \u5b57\u6bb5\u7528\u4e8e\u5b58\u50a8\u89d2\u8272\u7684\u88c5\u5907\u4fe1\u606f, \u90a3\u4e48\u5927Blob \u5b57\u6bb5\u7684\u66f4\u65b0\u5c31\u4f1a\u6210\u4e3a\u6570\u636e\u5e93\u7684\u74f6\u9888, \u6bd4\u5982\u5728\u7ebf\u6559\u80b2\u884c\u4e1a\u9700\u8981\u6709\u62a2\u8bfe\u7684\u9700\u6c42, \u56e0\u6b64\u4f1a\u6709\u70ed\u70b9\u884c\u66f4\u65b0\u7684\u573a\u666f, \u5bf9\u70ed\u70b9\u884c\u5982\u4f55\u5904\u7406\u4f1a\u6210\u4e3a\u6570\u636e\u5e93\u7684\u74f6\u9888, \u6bd4\u5982SaaS \u884c\u4e1a, \u6bcf\u4e00\u4e2a\u5ba2\u6237\u6709\u4e00\u4e2aDatabase, \u56e0\u6b64\u4f1a\u6709\u975e\u5e38\u591a\u7684Table, \u90a3\u4e48\u6570\u636e\u5e93\u5c31\u9700\u8981\u5bf9\u591a\u8868\u6709\u5f88\u597d\u7684\u652f\u6301\u80fd\u529b.\u6e38\u620f\u884c\u4e1a\u548c\u5176\u4ed6\u884c\u4e1a\u5bf9\u6570\u636e\u5e93\u7684\u4f7f\u7528\u8981\u6c42\u662f\u4e0d\u4e00\u6837\u7684.\u6240\u4ee5\u5728\u652f\u6491\u4e86\u5927\u91cf\u6e38\u620f\u4e1a\u52a1\u4e4b\u540e, \u6211\u7406\u89e3\u6e38\u620f\u884c\u4e1a\u5728\u4f7f\u7528\u81ea\u5efaMySQL \u7684\u65f6\u5019\u67093\u4e2a\u6bd4\u8f83\u5927\u7684\u75db\u70b9\u5bf9\u5907\u4efd\u6062\u590d\u7684\u9700\u6c42\u5bf9\u5199\u5165\u6027\u80fd\u7684\u8981\u6c42\u5bf9\u8de8region \u5bb9\u707e\u7684\u9700\u6c42\u63a5\u4e0b\u6765\u4f1a\u5206\u522b\u8bb2\u8ff0\u8fd9\u4e09\u4e2a\u75db\u70b9PolarDB \u662f\u5982\u4f55\u89e3\u51b3\u7684.\u00a0\u5907\u4efd\u6062\u590d\u7b14\u8005\u548c\u5927\u91cf\u6e38\u620f\u5f00\u53d1\u8005\u6c9f\u901a\u4e2d, \u6e38\u620f\u884c\u4e1a\u5bf9\u5907\u4efd\u6062\u590d\u7684\u9700\u6c42\u662f\u6781\u5176\u5f3a\u70c8\u7684. \u6bd4\u5982\u5728\u7535\u5546\u884c\u4e1a, \u662f\u4e0d\u53ef\u80fd\u5b58\u5728\u5c06\u6574\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\u8fdb\u884c\u56de\u6eda\u5230\u4e00\u5929\u4e4b\u524d\u7684\u6570\u636e, \u8fd9\u6837\u6240\u6709\u7684\u7528\u6237\u7684\u8d2d\u4e70\u4ea4\u6613\u4fe1\u606f\u90fd\u4e22\u5931\u4e86.\u4f46\u662f, \u5728\u6e38\u620f\u884c\u4e1a\u4e2d, \u8fd9\u79cd\u573a\u666f\u786e\u5b9e\u5b58\u5728\u7684, \u6bd4\u5982\u5728\u53d1\u7248\u7684\u65f6\u5019, \u6e38\u620f\u884c\u4e1a\u662f\u6709\u53ef\u80fd\u53d1\u7248\u5931\u8d25, \u8fd9\u4e2a\u5728\u5176\u4ed6\u884c\u4e1a\u51fa\u73b0\u6982\u7387\u975e\u5e38\u4f4e, \u5982\u679c\u53d1\u7248\u5931\u8d25, \u90a3\u4e48\u6574\u4e2a\u5b9e\u4f8b\u5c31\u9700\u8981\u56de\u6eda\u5230\u7248\u672c\u4e4b\u524d. \u56e0\u6b64\u6bcf\u6b21\u53d1\u7248\u7684\u65f6\u5019\u90fd\u9700\u8981\u5bf9\u6570\u636e\u5e93\u5b9e\u4f8b\u8fdb\u884c\u5907\u4efd. \u56e0\u6b64\u5f53\u6211\u4eec\u73a9\u6e38\u620f\u7684\u65f6\u5019, \u770b\u5230\u5927\u7248\u672c\u9700\u8981\u505c\u670d\u66f4\u65b0, \u90a3\u4e48\u5c31\u6709\u53ef\u80fd\u662f\u56e0\u4e3a\u540e\u53f0\u9700\u8981\u5907\u4efd\u6570\u636e\u7b49\u7b49\u4e00\u7cfb\u5217\u64cd\u4f5c\u4e86.\u8fd8\u6709\u4e00\u79cd\u573a\u666f, \u5f53\u53d1\u751f\u56e0\u4e3a\u5916\u6302, \u6f0f\u6d1e, \u53c2\u6570\u914d\u7f6e\u9519\u8bef\u7b49\u7b49\u573a\u666f\u4e0b, \u8fd9\u79cd\u7d27\u6025\u60c5\u51b5\u6e38\u620f\u5c31\u9700\u8981\u56de\u6eda\u5230\u51fa\u95ee\u9898\u524d\u7684\u7248\u672c, \u8fd9\u6837\u5c31\u9700\u8981\u5bf9\u6574\u4e2a\u5b9e\u4f8b\u8fdb\u884c\u56de\u6eda.\u00a0<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042209941\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\" ><br \/>\u5b98\u65b9MySQL \u7531\u4e8e\u662f\u5355\u673a\u67b6\u6784, \u90a3\u4e48\u5e38\u89c1\u7684\u5907\u4efd\u65b9\u6cd5\u662f\u901a\u8fc7Xtrabackup \u5de5\u5177, \u5c06\u6570\u636e\u5907\u4efd\u5230\u672c\u5730\u4ee5\u540e, \u5982\u679c\u672c\u5730\u7a7a\u95f4\u4e0d\u591f, \u5c31\u9700\u8981\u4e0a\u4f20\u5230OSS \u7b49\u8fdc\u7aef\u5b58\u50a8\u4e2d. \u901a\u5e38\u901a\u8fc7Xtrabackup \u5907\u4efd\u5de5\u5177\u90fd\u9700\u89811h \u5de6\u53f3, \u5982\u679c\u9700\u8981\u5c06\u6570\u636e\u4e0a\u4f20\u5230\u8fdc\u7aef\u90a3\u4e48\u65f6\u95f4\u5c31\u66f4\u957f\u4e86.PolarDB \u662f\u5929\u7136\u7684\u8ba1\u5b58\u5206\u79bb\u7684\u67b6\u6784, \u90a3\u4e48\u5907\u4efd\u7684\u65f6\u5019\u901a\u8fc7\u5e95\u4e0b\u5206\u5e03\u5f0f\u5b58\u50a8\u7684\u5feb\u7167\u80fd\u529b, \u5907\u4efd\u53ef\u4ee5\u4e0d\u8d85\u8fc730s, \u5c06\u5907\u4efd\u65f6\u95f4\u5927\u5927\u7f29\u77ed\u4e86.\u6838\u5fc3\u601d\u8def\u662f\u91c7\u7528Redirect-on-Write \u673a\u5236, \u6bcf\u6b21\u521b\u5efa\u5feb\u7167\u5e76\u6ca1\u6709\u771f\u6b63Copy\u6570\u636e, \u53ea\u6709\u5efa\u7acb\u5feb\u7167\u7d22\u5f15, \u5f53\u6570\u636e\u5757\u540e\u671f\u6709\u4fee\u6539(Write)\u65f6\u624d\u628a\u5386\u53f2\u7248\u672c\u4fdd\u7559\u7ed9Snapshot, \u7136\u540e\u751f\u6210\u65b0\u7684\u6570\u636e\u5757, \u88ab\u539f\u6570\u636e\u5f15\u7528(Redirect).\u53e6\u5916\u4e00\u79cd\u573a\u666f\u662f, \u5728\u6e38\u620f\u884c\u4e1a\u4e2d, \u6709\u53ef\u80fd\u67d0\u4e00\u4e2a\u73a9\u5bb6\u7684\u88c5\u5907\u88ab\u76d7\u53f7\u4e86, \u90a3\u4e48\u73a9\u5bb6\u5c31\u4f1a\u627e\u6e38\u620f\u7684\u8fd0\u8425\u4eba\u5458\u6295\u8bc9, \u8fd0\u8425\u4eba\u5458\u4f1a\u627e\u5230\u6e38\u620f\u8fd0\u7ef4\u4eba\u5458, \u5e2e\u5fd9\u67e5\u8be2\u73a9\u5bb6\u7684\u5386\u53f2\u6570\u636e.\u7b14\u8005\u4e4b\u524d\u5c31\u9047\u5230\u67d0\u8457\u540d\u6e38\u620f\u591a\u4e2a\u73a9\u5bb6\u88ab\u76d7\u53f7, \u7136\u540e\u8fd0\u7ef4\u4eba\u5458\u7ecf\u5e38\u9700\u8981\u901a\u8fc7PolarDB \u6309\u65f6\u95f4\u7684\u8fd8\u539f\u7684\u80fd\u529b\u6062\u590d\u51fa\u67d0\u591a\u4e2a\u4e0d\u540c\u65f6\u95f4\u70b9\u7684\u5b9e\u4f8b, \u7528\u6765\u67e5\u8be2\u8fd9\u4e2a\u73a9\u5bb6\u7684\u5177\u4f53\u88c5\u5907\u4fe1\u606f, \u540c\u65f6\u7531\u4e8e\u73a9\u5bb6\u5bf9\u76d7\u53f7\u7684\u65f6\u95f4\u4e5f\u4e0d\u51c6\u786e, \u7ecf\u5e38\u6709\u65f6\u5019\u9700\u8981\u8fd8\u539f\u51fa\u591a\u4e2a\u5b9e\u4f8b\u624d\u53ef\u4ee5.\u9488\u5bf9\u8fd9\u6837\u7684\u573a\u666f, PolarDB \u63a8\u51fa\u4e86Flashback Query, \u5c31\u53ef\u4ee5\u5728\u5f53\u524d\u5b9e\u4f8b\u67e5\u8be2\u51fa\u4efb\u610f\u65f6\u95f4\u70b9\u7684\u5386\u53f2\u6570\u636e. \u5177\u4f53\u539f\u7406\u89c1\u6587\u7ae0\u00a0Flashback Query\u00a0<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042209942\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\" ><br \/>\u6574\u4f53\u800c\u8a00, PolarDB \u5efa\u7acb\u4e86\u4e00\u5957\u975e\u5e38\u5b8c\u5584\u7684\u5907\u4efd\u6062\u590d\u80fd\u529b, \u4ece\u5e93=&gt;\u8868=&gt;\u884c\u4e09\u4e2a\u7ef4\u5ea6\u6ee1\u8db3\u7684\u6e38\u620f\u884c\u4e1a\u5bf9\u5907\u4efd\u6062\u590d\u7684\u9700\u6c42.<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042209943\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\" ><br \/>\u00a0\u5199\u5165\u6027\u80fd\u6e38\u620f\u884c\u4e1a\u4f7f\u7528\u6570\u636e\u5e93\u7684\u65b9\u5f0f\u4e5f\u4e0e\u5176\u4ed6\u884c\u4e1a\u6709\u8f83\u5927\u533a\u522b, \u662f\u4e00\u79cd\u975e\u5e38\u5f31Schema \u7684\u4f7f\u7528\u65b9\u5f0f, \u5176\u4ed6\u884c\u4e1a\u901a\u5e38\u5bf9\u4e1a\u52a1\u7ecf\u5e38\u62bd\u8c61, \u5efa\u7acb\u8868\u7ed3\u6784, \u6bcf\u4e2a\u5b57\u6bb5\u5c3d\u53ef\u80fd\u5c0f, \u4e0d\u5efa\u8bae\u6709\u5927\u5b57\u6bb5, \u6709\u5927\u5b57\u6bb5\u5c3d\u53ef\u80fd\u8fdb\u884c\u62c6\u5c01\u7b49\u7b49.\u00a0\u4f46\u662f\u5728\u6e38\u620f\u884c\u4e1a\u4e2d, \u7531\u4e8e\u9700\u8981\u6ee1\u8db3\u6e38\u620f\u5feb\u901f\u8fed\u4ee3\u53d1\u5c55\u7684\u9700\u6c42, \u73a9\u5bb6\u7684\u88c5\u5907\u4fe1\u606f\u7ed3\u6784\u975e\u5e38\u590d\u6742, \u56e0\u6b64\u5e38\u89c1\u7684\u505a\u6cd5\u662f\u5c06\u73a9\u5bb6\u88c5\u5907\u7b49\u7ea7\u4fe1\u606f\u4fdd\u5b58\u5728\u4e00\u4e2a\u5927\u7684blob\u5b57\u6bb5\u4e2d, \u8fd9\u4e2ablob\u5b57\u6bb5\u901a\u8fc7proto_buf \u6216\u8005 json \u8fdb\u884c\u7f16\u89e3\u7801, \u6bcf\u6b21\u5728\u83b7\u5f97\u88c5\u5907\u6216\u8005\u5347\u7ea7\u4ee5\u540e, \u5c31\u8fdb\u884c\u6574\u4e2a\u5b57\u6bb5\u66f4\u65b0, \u00a0\u5728\u6e38\u620f\u5f00\u670d\u521d\u671f\u73a9\u5bb6\u6570\u636e\u957f\u5ea6\u8f83\u77ed, \u800c\u968f\u7740\u6e38\u620f\u7248\u672c\u66f4\u65b0\u7248\u672c, \u6e38\u620f\u5267\u60c5, \u8fd0\u8425\u6d3b\u52a8\u7684\u589e\u591a, \u76f8\u5bf9\u4e8e\u6e38\u620f\u5f00\u670d\u521d\u671f\u7684\u6570KB, blob\u5b57\u6bb5\u7684\u957f\u5ea6\u53ef\u80fd\u4f1a\u81a8\u80c0\u5230\u6570\u767eKB, \u751a\u81f3\u8fbe\u5230MB\u7ea7\u522b, \u56e0\u6b64\u53ef\u80fd\u53ea\u662f\u83b7\u5f97\u4e00\u4e2a\u88c5\u5907, \u5c31\u9700\u8981\u5411\u6570\u636e\u5e93\u5199\u5165\u6570\u767eKB \u5927\u5c0f\u7684\u6570\u636e, \u8fd9\u6837\u7684\u5199\u653e\u5927\u5176\u5b9e\u975e\u5e38\u4e0d\u5408\u7406.\u00a0\u76ee\u524d\u4e5f\u6709\u50cfMongoDB \u8fd9\u6837\u7684\u6587\u6863\u6570\u636e\u5e93, \u8ba9\u7528\u6237\u5199\u5165\u7684\u65f6\u5019\u4ec5\u4ec5\u66f4\u65b0\u67d0\u4e2a\u5b57\u6bb5, \u4ece\u800c\u51cf\u5c11\u5199\u653e\u5927. \u4f46\u662f\u8fd9\u6837\u5f71\u54cd\u4e86\u7528\u6237\u7684\u4f7f\u7528\u4e60\u60ef, \u9700\u8981\u7528\u6237\u5728\u4e1a\u52a1\u903b\u8f91\u4e0a\u8fdb\u884c\u4fee\u6539, \u8fd9\u662f\u5feb\u901f\u53d1\u5c55\u7684\u6e38\u620f\u884c\u4e1a\u6240\u4e0d\u80fd\u63a5\u53d7\u7684, \u6240\u4ee5\u7b14\u8005\u770b\u5230\u5c3d\u7ba1\u6709\u5ba2\u6237\u56e0\u4e3a\u5199\u5165\u95ee\u9898\u8f6c\u5411\u4e86MongoDB, \u4f46\u662f\u5176\u5b9e\u4e0d\u591a.\u00a0PolarDB \u9488\u5bf9\u8fd9\u6837\u7684\u60c5\u51b5\u5c3d\u53ef\u80fd\u6ee1\u8db3\u7528\u6237\u7684\u4f7f\u7528\u4e60\u60ef, \u5728\u6570\u636e\u5e93\u5185\u6838\u5c42\u9762\u4f18\u5316\u6570\u636e\u5e93\u7684\u5199\u5165\u80fd\u529b. \u901a\u8fc7 partition redo log, redo log cache, undo log readahead, \u00a0early lock release, no blob latch \u7b49\u7b49\u80fd\u529b\u5c06\u5199\u5165\u80fd\u529b\u5145\u5206\u4f18\u5316. \u5177\u4f53\u539f\u7406\u53ef\u4ee5\u53c2\u8003\u6211\u4eec\u5185\u6838\u6708\u62a5\u00a0\u548c\u4e4b\u524d\u7684\u6587\u7ae0PolarDB-cloudjump\u00a0\u9488\u5bf9\u6e38\u620f\u573a\u666f, \u6211\u4eec\u4fee\u6539\u4e86 sysbench \u5de5\u5177, \u6a21\u62df\u6e38\u620f\u884c\u4e1a\u4e2d\u5927Blob \u66f4\u65b0\u7684workload, \u653e\u5728\u00a0game-sysbench\u00a0\u5de5\u5177\u4e2d, \u540e\u7eed\u6211\u4eec\u8fd8\u4f1a\u5c06\u66f4\u591a\u884c\u4e1a\u6bd4\u5982Saas, \u7535\u5546\u7b49\u7b49\u884c\u4e1a\u7684workload \u653e\u5728\u8fd9\u4e2a\u5de5\u5177\u4e2d.\u5728game_blob_update workload \u4e2d, \u5982\u679c\u73a9\u5bb6\u7684\u5e73\u5747\u88c5\u5907\u4fe1\u606f\u662f 300kb, \u6211\u4eec\u5bf9\u6bd4\u4e86PolarDB VS aurora VS \u81ea\u5efaMySQL \u7684\u6570\u636ePolarDB 8.0 \u76f8\u5bf9\u6709\u6700\u9ad8\u7684QPS 1877.44, \u5cf0\u503cQPS\u6700\u9ad8\u53ef\u4ee5\u52302000, CPU bound\u573a\u666fPolarDB\u7684\u6027\u80fd\u5927\u6982\u662fAurora\u76845.7\u500d, \u662f\u81ea\u5efa MySQL \u672c\u5730\u76d8\u76843\u500d. IO bound\u573a\u666fPolarDB\u7684\u6027\u80fd\u662fAurora\u768415\u500d.CPU bound\u573a\u666f\uff1aDB\u5e76\u53d1\u6570\u636eQPSPolarDB 8.051877.44MySQL 8.0 \u672c\u5730\u76d84600.22Aurora 8.0200328.47\u00a0IO bound\u573a\u666f\uff1aDB\u5e76\u53d1\u6570\u636eQPSPolarDB 8.02001035.30MySQL 8.0 \u672c\u5730\u76d8200610Aurora 8.020069.15\u00a0\u00a0\u8de8region \u5bb9\u707e\u00a0\u76ee\u524d\u6e38\u620f\u884c\u4e1a\u7eb7\u7eb7\u51fa\u6d77, \u5305\u542b\u4e86\u6e38\u620f\u670d\u548c\u5e73\u53f0\u670d. \u7528\u6237\u5728\u81ea\u5efaMySQL\/RDS \u7684\u573a\u666f\u4e2d, \u00a0\u7528\u6237\u53ef\u80fd\u9700\u8981\u5728\u53e6\u5916\u4e00\u4e2aregion \u5efa\u7acb\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b, \u7136\u540e\u901a\u8fc7\u540c\u6b65\u5de5\u5177\u6216\u8005DTS \u8fdb\u884c\u8de8region \u5907\u4efd. \u7528\u6237\u9700\u8981\u5904\u7406region \u9519\u8bef\u573a\u666f\u5982\u4f55\u8fdb\u884c\u5207\u6362\u7b49\u7b49.\u7b14\u8005\u8ba4\u4e3a\u5bf9\u6570\u636e\u5e93\u800c\u8a00, \u7a33\u5b9a\u6027 &gt; \u6613\u7528\u6027 &gt; \u6027\u80fd.\u00a0\u5728\u8fd9\u4e2a\u573a\u666f\u4e2d, \u7528\u6237\u5982\u679c\u4f7f\u7528\u4e91\u5382\u5546\u7684\u8bdd, \u4f7f\u7528\u7684\u662f\u4e91\u5382\u5546\u63d0\u4f9b\u7684\u539f\u5b50\u80fd\u529b, \u81ea\u5df1\u901a\u8fc7\u7ec4\u88c5\u8fd9\u4e9b\u539f\u5b50\u80fd\u529b\u5b9e\u73b0\u5bb9\u707e\u7684\u9700\u6c42, \u800cPolarDB \u9488\u5bf9\u8fd9\u6837\u573a\u666f\u63d0\u51fa\u6765PolarDB GlobalDataba \u7684\u89e3\u51b3\u65b9\u6848, \u5c06\u8de8region \u7684\u5bb9\u707e\u653e\u5728\u89e3\u51b3\u65b9\u6848\u4e2d, \u63d0\u4f9b\u4e86\u4e00\u4e2a\u66f4\u52a0\u6613\u5bb9\u7684\u89e3\u51b3\u65b9\u6848, \u4ece\u800c\u7528\u6237\u53ef\u4ee5\u5173\u6ce8\u81ea\u8eab\u7684\u4e1a\u52a1\u903b\u8f91, \u800c\u4e0d\u9700\u8981\u5904\u7406\u8fd9\u4e9b\u5bb9\u707e\u7684\u573a\u666f.\u00a0\u5728\u5177\u4f53\u8de8region \u7684\u540c\u6b65\u573a\u666f\u65b9\u6848\u4e2d, PolarDB \u662f\u901a\u8fc7\u591a\u901a\u9053\u7269\u7406\u590d\u5236\u80fd\u529b, \u4ece\u800c\u4fdd\u8bc1\u8de8region \u7684\u5bb9\u707e\u57281s \u4ee5\u5185.\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=QAwayJNSpXynlrH%2BgiK3SQ%3D%3D.5mWz6%2B0j%2BLETpIJGFNftANYgBlqnIIGPX1scA1xcCUPzcLVd1iUKotNRdCx3mwXP\" rel=\"nofollow\">http:\/\/click.aliyun.com\/m\/100&#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\/1190000042209939\">https:\/\/segmentfault.com\/a\/1190000042209939<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0PolarDB \u5728\u6e38\u620f\u884c\u4e1a\u7684\u6700\u4f73\u5b9e\u8df5\u4e3a\u4ec0\u4e48\u6e38\u620f\u884c\u4e1a\u559c\u6b22\u7528PolarDB\u6e38\u620f\u884c\u4e1a\u75db\u70b9\u5728\u6211\u770b\u6765, \u4e0d\u540c\u884c\u4e1a [&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-10005997","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\/10005997","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=10005997"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10005997\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10005997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10005997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10005997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}