{"id":10006117,"date":"2022-08-05T18:32:26","date_gmt":"2022-08-05T10:32:26","guid":{"rendered":"https:\/\/ityet.com\/?p=10006117"},"modified":"2022-08-05T18:32:26","modified_gmt":"2022-08-05T10:32:26","slug":"polardb-b-tree-%e5%b9%b6%e5%8f%91%e6%8e%a7%e5%88%b6%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006117","title":{"rendered":"PolarDB B-tree \u5e76\u53d1\u63a7\u5236\u4f18\u5316"},"content":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0PolarDB \u89e3\u51b3\u4e86 InnoDB \u5728 B-tree \u5e76\u53d1\u63a7\u5236\u4e0a\u7684\u9650\u5236\uff0c\u89e3\u51b3 index lock \u7ade\u4e89\u95ee\u9898\uff0c\u5e76\u652f\u6301\u4e86 latch coupling\u3002InnoDB \u7d22\u5f15InnoDB \u5f15\u64ce\u4f7f\u7528\u7d22\u5f15\u7ec4\u7ec7\u8868\uff0c\u6bcf\u4e2a\u8868\u7684\u6570\u636e\u90fd\u653e\u5728\u4e00\u4e2a\u5bf9\u5e94\u7684\u7d22\u5f15\u4e2d\uff0c\u8be5\u7d22\u5f15\u79f0\u4e3a\u805a\u96c6\u7d22\u5f15\uff08clustered index\uff09\uff0c\u4f7f\u7528\u7d22\u5f15\u7ec4\u7ec7\u8868\u7684\u76ee\u7684\u662f\uff1a\u52a8\u6001\u5730\u7ec4\u7ec7\u78c1\u76d8\u6587\u4ef6\u7ed3\u6784\uff0c\u7ef4\u62a4\u6570\u636e\u8bb0\u5f55\u6709\u5e8f\uff1b\u501f\u52a9\u7d22\u5f15\u5feb\u901f\u5b9a\u4f4d\u8bb0\u5f55\uff1b\u9664\u4e86 clustered index\uff0c\u4e00\u4e2a\u8868\u4e2d\u7684\u5176\u5b83\u7d22\u5f15\u79f0\u4e3a\u4e8c\u7ea7\u7d22\u5f15\uff08secondary indexes\uff09\u3002\u4e8c\u7ea7\u7d22\u5f15\u7684\u6bcf\u4e2a record \u9664\u4e86\u5305\u542b\u672c\u8eab\u7684 columns\uff0c\u8fd8\u5305\u542b\u5176\u5bf9\u5e94\u7684\u6570\u636e\u884c\u7684 primary key\uff0cInnoDB \u53ef\u4ee5\u5229\u7528 primary key \u53bb\u4e3b\u7d22\u5f15\u627e\u5230\u5b8c\u6574\u7684 row\u3002InnoDB \u4f7f\u7528 B-tree \u4f5c\u4e3a\u7d22\u5f15\u7684\u6570\u636e\u7ed3\u6784\uff0cB-tree \u672c\u8d28\u662f\u591a\u7ea7\u7d22\u5f15\uff0c\u6241\u5e73\u4e14\u5e73\u8861\u7684\u6811\u7ed3\u6784\u53ef\u4ee5\u4fdd\u8bc1\u5355\u6b21\u8bbf\u95ee\u6570\u636e\u7684 IO \u6b21\u6570\u8f83\u5c0f\u4e14\u56fa\u5b9a\u3002InnoDB \u5b9e\u73b0\u7684 B-tree \u7ed3\u6784\u6709\u51e0\u70b9\u7279\u6027\uff1a\u5b9e\u9645\u6570\u636e\u5168\u90e8\u5b58\u50a8\u5728 leaf \u5c42\uff08\u5373 B+ tree\uff0c\u964d\u4f4e\u6811\u9ad8\u5ea6\u3001\u4f18\u5316\u987a\u5e8f\u8bbf\u95ee\uff09\uff1bnon-leaf \u5c42\u53ea\u5b58\u50a8\u7d22\u5f15\u9879\uff08key, page no\uff09\uff0c\u6bcf\u4e2a\u7d22\u5f15\u9879\u6307\u5411\u552f\u4e00\u4e00\u4e2a child \u8282\u70b9\uff1b\u4e00\u4e2a\u7d22\u5f15\u9879\u7684 key \u4e3a P\uff0c\u5b83\u7684 child \u8282\u70b9\u53ea\u80fd\u5b58 &gt;= P \u5e76\u4e14 &lt; P1 \u7684\u8bb0\u5f55\uff0c\u5176\u4e2d P1 \u662f\u4e0b\u4e00\u4e2a\u7d22\u5f15\u9879\u7684 key\uff1b\u6bcf\u5c42\u8282\u70b9\u901a\u8fc7\u53cc\u5411\u94fe\u8868\u4e32\u8d77\u6765\uff1bB-tree \u5e76\u53d1\u63a7\u5236\u5982\u679c\u628a B-tree \u7d22\u5f15\u770b\u6210\u4e00\u4e2a\u9ed1\u76d2\uff0c\u4e0d\u5173\u5fc3\u5185\u90e8\u5177\u4f53\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5916\u9762\u770b\u6765\u53ea\u6709\u6709\u5e8f\u6392\u5217\u7684 record\uff0c\u6240\u6709\u7684\u8bfb\u53d6\u3001\u63d2\u5165\u3001\u5220\u9664\u7b49\u64cd\u4f5c\u90fd\u80fd\u539f\u5b50\u5730\u4e00\u6b65\u5b8c\u6210\u3002\u8fd9\u65f6\u591a\u7ebf\u7a0b\u5e76\u53d1\u64cd\u4f5c\u4e0d\u4f1a\u611f\u77e5\u5230\u7d22\u5f15\u7ed3\u6784\uff0c\u53ea\u9700\u8981\u8003\u8651\u4e8b\u52a1\u5c42\u9762\u7684\u7ea6\u675f\uff0c\u4f8b\u5982 InnoDB \u4e2d\u4e00\u4e2a\u4e8b\u52a1\u5bf9 record \u52a0\u903b\u8f91\u9501\uff08lock\uff09\u963b\u6b62\u5176\u5b83\u4e8b\u52a1\u8bbf\u95ee\u3002\u4f46\u662f\u5b9e\u9645\u7684 B-tree \u64cd\u4f5c\u4e0d\u662f\u539f\u5b50\u7684\uff0c\u4f8b\u5982\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u5728\u505a\u7ed3\u6784\u8c03\u6574\uff08SMO\uff09\u65f6\u4f1a\u6d89\u53ca\u591a\u4e2a\u9875\u9762\u7684\u6539\u52a8\uff0c\u6b64\u65f6\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u6765\u4f1a\u8bbf\u95ee\u5230\u4e0d\u6b63\u786e\u7684 B-tree \u7ed3\u6784\u800c\u4ea7\u751f\u9519\u8bef\uff0c\u53e6\u5916\uff0c\u9875\u9762\u5185\u90e8\u7684\u6570\u636e\u7ed3\u6784\u6539\u52a8\u4e5f\u4e0d\u80fd\u591a\u7ebf\u7a0b\u5e76\u53d1\u6267\u884c\u3002InnoDB \u662f\u91c7\u7528 page \u52a0\u9501\u7684\u65b9\u5f0f\u5bf9 B-tree \u8fdb\u884c\u5e76\u53d1\u63a7\u5236\uff0c\u6bcf\u4e2a page \u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u7269\u7406\u8bfb\u5199\u9501\uff08rw latch\uff09\uff0c\u7ebf\u7a0b\u8bfb\u53d6\u4e00\u4e2a page \u8981\u5148\u52a0 S latch\uff0c\u4fee\u6539 page \u65f6\u8981\u52a0 X latch\u3002\u56e0\u4e3a B-tree \u7d22\u5f15\u7684\u8bbf\u95ee\u548c\u4fee\u6539\u6d41\u7a0b\u662f\u786e\u5b9a\u7684\uff0c\u6240\u4ee5 InnoDB \u6709\u4e00\u5957\u8bbe\u8ba1\u597d\u7684\u52a0\u9501\u89c4\u5219\uff0c\u9632\u6b62\u591a\u7ebf\u7a0b\u6b7b\u9501\u3002\u4e0e\u4e4b\u5bf9\u5e94\u7684\u662f\uff0c\u4e8b\u52a1\u9501\uff08lock\uff09\u662f\u7528\u6237\u5c42\u9762\u7684\uff0c\u52a0\u9501\u987a\u5e8f\u4e0d\u53ef\u63a7\uff0c\u56e0\u6b64\u9700\u8981\u6b7b\u9501\u68c0\u6d4b\u673a\u5236\u3002\u5e76\u53d1\u74f6\u9888InnoDB \u5bf9 B-tree \u7684\u5e76\u53d1\u63a7\u5236\u5b9e\u73b0\u7ec6\u8282\u53ef\u4ee5\u53c2\u8003\u00a0InnoDB btree latch \u4f18\u5316\u5386\u7a0b\u00a0\u8fd9\u7bc7\u6587\u7ae0\uff0c\u53ef\u4ee5\u770b\u5230\u591a\u6b21\u4f18\u5316\u6539\u8fdb\u7684\u76ee\u7684\u90fd\u662f\u4e3a\u4e86\u63d0\u9ad8 B-tree \u7684\u5e76\u53d1\u8bbf\u95ee\u80fd\u529b\uff0c\u5373\u5c3d\u91cf\u51cf\u5c0f\u6bcf\u4e2a\u64cd\u4f5c\u7684\u52a0\u9501\u8303\u56f4\u548c\u65f6\u95f4\u3002\u76ee\u524d 8.0 \u7248\u672c\u5728 B-tree \u5e76\u53d1\u4e0a\u8fd8\u6709\u4e00\u4e9b\u9650\u5236\uff1aSMO \u65e0\u6cd5\u5e76\u53d1\uff1a\u540c\u4e00\u65f6\u523b\u53ea\u5141\u8bb8\u6709\u4e00\u4e2a SMO \u8fdb\u884c\uff08SMO \u7ebf\u7a0b\u6301\u6709 index SX latch\uff09\uff0c\u5bfc\u81f4\u5728\u5927\u6279\u91cf\u63d2\u5165\u573a\u666f\u4e0b index latch \u4f1a\u6210\u4e3a\u5168\u5c40\u7684\u74f6\u9888\u70b9\uff0cMySQL \u5b98\u65b9\u6027\u80fd\u6d4b\u8bd5\u4eba\u5458 Dimitrick \u4e5f\u6307\u51fa TPCC \u573a\u666f\u4e0b\u6700\u5927\u7684\u74f6\u9888\u5728\u4e8e index lock contention\uff08MySQL Performance : TPCC &#8220;Mystery&#8221; [SOLVED]\uff09\u3002\u8bbe\u60f3\u4e00\u4e0b\uff0c\u5982\u679c\u5c06\u8fd9\u4e2a\u9650\u5236\u653e\u5f00\uff0c\u591a\u4e2a\u505a SMO \u7684\u7ebf\u7a0b\u4f1a\u540c\u65f6\u8fdb\u5165 B-tree\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u8981\u62ff\u591a\u4e2a page\uff0c\u5982\u4f55\u8bbe\u8ba1\u52a0\u9501\u89c4\u5219\u907f\u514d\u7ebf\u7a0b\u95f4\u6b7b\u9501\uff0c\u6709\u5f88\u591a\u7ec6\u8282\u9700\u8981\u5904\u7406\u3002\u52a0\u9501\u8303\u56f4\u5927\uff1a\u4e3a\u4e86\u907f\u514d\u6b7b\u9501\uff0c\u4e50\u89c2\u8bfb\u5199\u64cd\u4f5c\u8981\u6301\u6709\u904d\u5386\u8def\u5f84\u4e0a\u6240\u6709 non-leaf page \u7684 S latch\uff0cSMO \u64cd\u4f5c\u8981\u6301\u6709\u6240\u6709\u53ef\u80fd\u4fee\u6539\u7684 page \u7684 X latch\u3002\u5355\u4e00\u64cd\u4f5c\u7684\u52a0\u9501\u8303\u56f4\u6bd4\u8f83\u5927\uff0c\u5e76\u53d1\u64cd\u4f5c\u8d8a\u591a\u8d8a\u4f1a\u52a0\u5267\u9501\u7ade\u4e89\uff0c\u5728\u67d0\u4e9b\u5173\u952e\u8282\u70b9\uff08\u4f8b\u5982\uff0croot\u3001internal node\uff09\u7684\u7ade\u4e89\u4f1a\u66f4\u660e\u663e\u3002\u7406\u8bba\u4e0a\u91c7\u7528 latch coupling \u7684\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c0f\u52a0\u9501\u8303\u56f4\uff0c\u904d\u5386\u8fc7\u7a0b\u4e2d\u6700\u591a\u540c\u65f6\u6301\u6709 2 \u4e2a page \u7684\u9501\uff08\u5373\u6cbf\u7740\u4e00\u4e2a\u6307\u9488\u4ece\u4e00\u4e2a\u8282\u70b9\u5230\u53e6\u4e00\u4e2a\u8282\u70b9\u65f6\uff0c\u4e0d\u80fd\u6709\u5176\u4ed6\u7ebf\u7a0b\u53bb\u6539\u53d8\u8fd9\u4e2a\u6307\u9488\uff0c\u56e0\u6b64\u8981\u62ff\u5230\u540e\u4e00\u4e2a\u8282\u70b9\u7684 latch \u518d\u653e\u5f00\u524d\u4e00\u4e2a latch\uff09\uff0c\u6709\u5229\u4e8e\u964d\u4f4e\u5e76\u53d1\u64cd\u4f5c\u7684\u7ade\u4e89\u3002PolarDB \u5e76\u53d1\u63a7\u5236\u4f18\u5316PolarDB \u89e3\u51b3\u4e86 InnoDB \u5728 B-tree \u5e76\u53d1\u63a7\u5236\u4e0a\u7684\u9650\u5236\uff1a\u63d0\u5347\u5e76\u53d1\u5ea6\uff1a\u53bb\u9664 index \u9501\uff0c\u5141\u8bb8\u6240\u6709\u64cd\u4f5c\u5e76\u53d1\u8bbf\u95ee B-tree\uff0c\u7ebf\u7a0b\u95f4\u51b2\u7a81\u53ea\u5728 page \u7ea7\u522b\uff1b\u964d\u4f4e\u9501\u7c92\u5ea6\uff1a\u6240\u6709\u64cd\u4f5c\u90fd\u5b9e\u73b0\u4e86 latch coupling\uff0c\u51cf\u5c0f\u9501\u8303\u56f4\uff0c\u5927\u5927\u964d\u4f4e\u7ebf\u7a0b\u95f4\u51b2\u7a81\uff1bPolarDB \u8bbe\u8ba1\u4e86\u9875\u7ea7\u522b\u7684 B-tree \u5e76\u53d1\u63a7\u5236\uff0c\u5bf9\u7d22\u5f15\u9875\u7684\u52a0\u9501\u89c4\u5219\u5982\u4e0b\uff1a\u89c4\u5219 1\uff1a\u6240\u6709\u64cd\u4f5c\u91c7\u7528 latch coupling \u5f62\u5f0f\u904d\u5386 B-tree\uff0c\u904d\u5386\u8fc7\u7a0b\u4e2d\u5bf9\u975e\u76ee\u6807\u8282\u70b9\u52a0 S latch\uff08\u76f8\u5f53\u4e8e\u8bfb\u53d6\u8282\u70b9\u6307\u9488\uff09\uff0c\u76f4\u5230\u627e\u5230\u76ee\u6807\u8282\u70b9\uff0c\u6839\u636e\u64cd\u4f5c\u8bfb\/\u5199\u7c7b\u578b\u5bf9\u76ee\u6807\u8282\u70b9\u52a0 S latch \u6216 X latch\uff08SMO \u64cd\u4f5c\u6d89\u53ca\u90bb\u5c45\u8282\u70b9\u66f4\u65b0\uff0c\u8fd8\u9700\u8981\u52a0\u5de6\u53f3\u90bb\u5c45\u8282\u70b9\u7684 latch\uff09\uff1b\u4e3a\u4e86\u907f\u514d\u6b7b\u9501\uff0c\u89c4\u5b9a\u52a0\u9501\u65b9\u5411\u4e3a\uff0c\u81ea\u4e0a\u800c\u4e0b\uff0c\u4ece\u5de6\u5230\u53f3\u3002\u800c SMO \u64cd\u4f5c\u662f\u81ea\u4e0b\u800c\u4e0a\u7684\uff0c\u5373 SMO \u7684\u52a0\u9501\u65b9\u5411\u662f\u7834\u574f\u89c4\u5219\u7684\uff0c\u4f1a\u9020\u6210\u6b7b\u9501\uff08InnoDB \u7684 SMO \u64cd\u4f5c\u4e0d\u4f7f\u7528 latch coupling \u65b9\u5f0f\uff0c\u5f00\u59cb\u5c31\u4ece\u4e0a\u5230\u4e0b\u62ff\u5230\u6240\u6709\u76f8\u5173\u8282\u70b9\u7684 latch\uff0c\u4ece\u800c\u907f\u514d\u6b7b\u9501\uff09\u3002\u89c4\u5219 2\uff1a\u5728 SMO \u64cd\u4f5c\u4e2d\u95f4\uff0c\u7533\u8bf7\u7236\u8282\u70b9\u6216\u5de6\u90bb\u5c45\u8282\u70b9\u7684 latch \u4e4b\u524d\uff0c\u5bf9\u5f53\u524d\u6301\u6709 X latch \u7684 page \u505a SMO \u6807\u8bb0\uff0c\u5e76\u91ca\u653e\u8fd9\u4e9b latch\u3002\u8fd9\u91cc\u501f\u9274\u4e86 B-link \u7684\u8bbe\u8ba1\uff0c\u5c06 SMO \u64cd\u4f5c\u5212\u5206\u4e3a\u4e24\u4e2a\u9636\u6bb5\uff0c\u7b2c\u4e00\u9636\u6bb5\u5b8c\u6210\u63d0\u524d\u91ca\u653e latch\uff0c\u907f\u514d\u4e86 SMO \u64cd\u4f5c\u53cd\u5411\u52a0\u9501\u3002\u8fd9\u6837\uff0c\u5728 SMO \u4e2d\u95f4\u72b6\u6001\u6ca1\u6709\u6301\u6709\u4efb\u4f55 latch\u3002SMO \u4e2d\u95f4\u72b6\u6001\u8282\u70b9\u8bbe\u7f6e\u4e00\u4e2a\u6307\u5411\u5176\u53f3\u4fa7\u8282\u70b9\u7684\u6307\u9488\uff08side link\uff09\uff0c\u5176\u5b83\u8bfb\u64cd\u4f5c\u8bbf\u95ee\u5230 SMO \u4e2d\u95f4\u72b6\u6001\u7684\u8282\u70b9\uff0c\u5e76\u53ef\u4ee5\u540c\u65f6\u5728\u5176 right page \u4e2d\u68c0\u7d22\uff0c\u89e3\u51b3\u4e86 B-tree \u7ed3\u6784\u4e0d\u5b8c\u6574\u7684\u95ee\u9898\u3002\u5176\u5b83\u5199\u64cd\u4f5c\u4e0d\u5e94\u8be5\u4fee\u6539\u5904\u4e8e SMO \u4e2d\u95f4\u72b6\u6001\u7684\u8282\u70b9\uff0c\u56e0\u4e3a\u4e4b\u524d SMO \u64cd\u4f5c\u8fd8\u6ca1\u63d0\u4ea4\u3002\u56e0\u6b64\uff0c\u5176\u5b83\u7ebf\u7a0b\u7684\u5199\u64cd\u4f5c\u9047\u5230 SMO \u8282\u70b9\uff0c\u8981\u7b49\u5f85\u5176 SMO \u5b8c\u6210\u3002\u89c4\u5219 3:\u00a0\u5176\u5b83\u7ebf\u7a0b\u904d\u5386\u5230\u6709 SMO \u6807\u8bb0\u7684\u8282\u70b9\uff0c\u5e76\u60f3\u8981\u4fee\u6539\u8be5\u8282\u70b9\u65f6\uff1a\u7acb\u5373\u91ca\u653e\u6389\u5df2\u6301\u6709\u7684 latch\uff0c\u7b49\u5f85\u8be5\u8282\u70b9 SMO \u5b8c\u6210\u518d\u4ece root \u91cd\u8bd5\uff1b\u5982\u679c\u5176\u5b83\u7ebf\u7a0b\u4e0d\u91ca\u653e\u5df2\u6301\u6709\u7684 latch\uff0c\u76f8\u5f53\u4e8e\u8ddf SMO \u7ebf\u7a0b\u4e4b\u95f4\u4e92\u76f8\u5360\u6709\u5e76\u7b49\u5f85\uff0c\u9020\u6210\u6b7b\u9501\u3002\u6027\u80fd\u5bf9\u6bd4\u91c7\u7528\u4e0a\u8ff0\u7684 B-tree \u5e76\u53d1\u63a7\u5236\u673a\u5236\uff0c\u5728\u9ad8\u5e76\u53d1 TPCC \u573a\u666f\uff081000 warehouse\uff09\u4e0b\uff1a\u5f53\u5e76\u53d1\u5c0f\u4e8e 64 \u65f6\uff0cInnoDB \u4e0e Polar index \u6027\u80fd\u7ed3\u679c\u63a5\u8fd1\uff0cInnoDB \u5728\u5e76\u53d1 128 \u65f6\u8fbe\u5230\u6027\u80fd\u5cf0\u503c\uff1bPolar index \u5728\u5e76\u53d1 256 \u65f6\u8fbe\u5230\u5cf0\u503c\uff0c\u53ef\u4ee5\u770b\u5230 Polar index \u76f8\u6bd4\u4e8e InnoDB\uff0c\u5cf0\u503c\u63d0\u9ad8 141%\uff1b<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042276379\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u539f\u6587\u94fe\u63a5:<a href=\"https:\/\/link.segmentfault.com\/?enc=MOdLew1QKWKhoKhJs4wzDA%3D%3D.9wYOWLLQCANMOqaNAfREbb2pKAdL70YnSa%2B5HF7zmmGsMLWjF9PVj24bpooqypKK\" 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\/1190000042276377\">https:\/\/segmentfault.com\/a\/1190000042276377<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0PolarDB \u89e3\u51b3\u4e86 InnoDB \u5728 B-tree \u5e76\u53d1\u63a7\u5236\u4e0a\u7684\u9650\u5236\uff0c\u89e3\u51b3 index lock  [&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-10006117","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\/10006117","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=10006117"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006117\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}