{"id":30172,"date":"2023-05-17T15:49:48","date_gmt":"2023-05-17T07:49:48","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=30172"},"modified":"2023-07-30T23:57:33","modified_gmt":"2023-07-30T15:57:33","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e5%88%86%e5%b8%83%e5%bc%8f%e6%95%b0%e6%8d%ae%e5%ba%93%e8%bf%99%e4%b9%88%e5%96%9c%e6%ac%a2%e7%94%a8kv-store","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/30172.html","title":{"rendered":"\u4e3a\u4ec0\u4e48\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u8fd9\u4e48\u559c\u6b22\u7528kv store"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>\u867d\u7136\u4e0d\u8bba\u662f\u5355\u673a\u6570\u636e\u5e93\uff08MySQL\u3001PostgreSQL\u7b49\u7b49\uff09\uff0c\u8fd8\u662f\u9898\u4e3b\u8bf4\u5230\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff08CockroachDB\u3001TiDB\uff09\uff0c\u90fd\u5b58\u5728KV\u8fd9\u4e2a\u62bd\u8c61\uff0c\u4f46\u5bf9\u4e8eKV\u8fd9\u4e2a\u63a5\u53e3\u7684\u8bbe\u8ba1\uff0c\u8fd8\u662f\u5b58\u5728\u5dee\u522b\u7684\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-30180\" decoding=\"async\" height=\"421\" sizes=\"(max-width: 680px) 100vw, 680px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u6dfb\u52a0\u6807\u9898-4-6.png?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u6dfb\u52a0\u6807\u9898-4-6.png?x-oss-process=image\/auto-orient,1\/format,webp 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u6dfb\u52a0\u6807\u9898-4-6-300x186.png 300w\" width=\"680\"\/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001\u4e3a\u4ec0\u4e48\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u8fd9\u4e48\u559c\u6b22\u7528kv store<\/strong><\/h2>\n<p>\u867d\u7136\u4e0d\u8bba\u662f\u5355\u673a\u6570\u636e\u5e93\uff08MySQL\u3001PostgreSQL\u7b49\u7b49\uff09\uff0c\u8fd8\u662f\u9898\u4e3b\u8bf4\u5230\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff08CockroachDB\u3001TiDB\uff09\uff0c\u90fd\u5b58\u5728KV\u8fd9\u4e2a\u62bd\u8c61\uff0c\u4f46\u5bf9\u4e8eKV\u8fd9\u4e2a\u63a5\u53e3\u7684\u8bbe\u8ba1\uff0c\u8fd8\u662f\u5b58\u5728\u5dee\u522b\u7684\u3002<\/p>\n<p>\u6570\u636e\u5e93\u901a\u5e38\u4f1a\u6709\u8fd9\u4e48\u51e0\u4e2a\u6a21\u5757\uff0cKV\u5b58\u50a8\u3001\u4e8b\u52a1\u3001\u7d22\u5f15\uff0c\u8fd9\u4e09\u8005\u4e4b\u95f4\u7684\u5173\u7cfb\u770b\u8d77\u6765\u6cfe\u6e2d\u5206\u660e\uff0c\u4f46\u5b9e\u9645\u4e0a\u4ea4\u7ec7\u8026\u5408\uff0c\u5176\u4e2d\u5b58\u5728\u5f88\u591a\u8bbe\u8ba1\u70b9\u3002<\/p>\n<p>\u540d\u5217\u524d\u8305\u79cd\u8bbe\u8ba1\u662f\u76ee\u524dshare-nothing\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7528\u7684\u6bd4\u8f83\u591a\u7684\uff1a\u57fa\u4e8e\u5355\u673aKV\u5b58\u50a8\u5b9e\u73b0\u5206\u5e03\u5f0fKV\uff0c\u518d\u57fa\u4e8e\u5206\u5e03\u5f0fKV\u5b9e\u73b0\u4e8b\u52a1\uff0c\u5728distributed transactional key-value store\u7684\u57fa\u7840\u4e0a\u518d\u5b9e\u73b0global index\uff0c\u4ee5\u53ca\u67e5\u8be2\u5f15\u64ce\u3002\u5728\u8fd9\u79cd\u8bbe\u8ba1\u4e0b\uff0c\u5355\u673a\u7684KV\u5b58\u50a8\u751a\u81f3\u4e0d\u9700\u8981\u652f\u6301\u4e8b\u52a1\uff0c\u56e0\u4e3a\u5b8c\u5168\u53ef\u4ee5\u57fa\u4e8e\u8fd9\u4e2aKV\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u3002\u5178\u578b\u4ee3\u8868\u662fTiDB\u3002<\/p>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u7684\u597d\u5904\u4e0d\u518d\u8d58\u8ff0\uff0c\u770b\u4e00\u4e0b\u5c40\u9650\u6027\uff1a\u5206\u5c42\u592a\u8fc7\u6e05\u6670\uff0c\u60f3\u6253\u901a\u591a\u4e2a\u5c42\u6b21\u7684\u65f6\u5019\u53cd\u800c\u6bd4\u8f83\u590d\u6742\u3002\u4f8b\u5982\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u662f\u4e0d\u662f\u53ef\u4ee5\u548cConsensus Protocol\u878d\u5408\uff0c\u5b9e\u73b0\u5b89\u5168\u7684MVCC Follower Read\uff1f\u662f\u4e0d\u662f\u53ef\u4ee5\u501f\u52a9\u5355\u673a\u5f15\u64ce\u7684\u4e8b\u52a1\uff0c\u6765\u4f18\u5316\u5355\u4e2aregion\u5185\u7684\u4e8b\u52a1\u907f\u514d\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u5f00\u9500\uff1f<\/p>\n<p>\u6240\u4ee5\u7b2c\u4e8c\u79cd\u8bbe\u8ba1\uff0c\u4fdd\u7559\u5355\u673a\u4e8b\u52a1\u7684\u6982\u5ff5\uff0c\u628a\u5355\u673a\u4e8b\u52a1\u5f53\u505acommon case\uff0c\u800c\u5206\u5e03\u5f0f\u4e8b\u52a1\u53ea\u662f\u9526\u4e0a\u6dfb\u82b1\u3002\u5960\u5b9a\u4e86\u8fd9\u4e48\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\u4e4b\u540e\uff0c\u901a\u5e38\u7d22\u5f15\u4e5f\u4f1a\u4f18\u5148\u505a\u6210\u5355\u673a\u7684\uff0c\u5168\u5c40\u7d22\u5f15\u7684\u4f18\u5148\u7ea7\u964d\u4f4e\u751a\u81f3\u4e0d\u505a\u3002\u5728\u8fd9\u79cd\u8bbe\u8ba1\u4e0b\uff0c\u5355\u673a\u7684KV\u5b58\u50a8\uff0c\u4e8b\u5b9e\u4e0a\u5c31\u9700\u8981\u652f\u6301\u4e8b\u52a1\uff0c\u751a\u81f3\uff0c\u4e3a\u4e86\u5728\u6b64\u57fa\u7840\u4e0a\u505a\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u8fd8\u9700\u8981\u63d0\u4f9b\u4e00\u4e9b\u989d\u5916\u7684\u63a5\u53e3\uff0c\u4f8b\u5982point-in-time snapshot read\u3002\u5178\u578b\u4ee3\u8868\u662fMongoDB\u3002<\/p>\n<p>\u7531\u4e8e\u5177\u6709\u4e86\u539f\u751f\u7684\u5355\u673a\u4e8b\u52a1\uff0c\u56e0\u6b64\u5728common case\u4e0b\u4f1a\u5f88\u9ad8\u6548\uff0c\u53ef\u4ee5\u5f53\u5355\u673a\u6570\u636e\u5e93\u6765\u7528\u3002\u4f46\u5176\u75db\u70b9\u4e5f\u968f\u4e4b\u4ea7\u751f\uff1a\u5982\u4f55\u57fa\u4e8e\u5355\u673a\u4e8b\u52a1\u505a\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u4e24\u9636\u6bb5\u63d0\u4ea4\u600e\u4e48\u505a\uff0c\u4e8b\u52a1\u9694\u79bb\u600e\u4e48\u505a\uff0c\u591a\u7248\u672c\u8bfb\u600e\u4e48\u505a\uff1f\u5e76\u4e14\uff0c\u8fd9\u4e9b\u529f\u80fd\u5f80\u5f80\u4f1a\u8026\u5408\u4e8e\u5355\u673a\u7684\u4e8b\u52a1\u5f15\u64ce\uff0c\u53ef\u60f3\u800c\u77e5\u5176\u590d\u6742\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u5355\u72ec\u8003\u8651\u7b2c\u4e8c\u79cd\u8bbe\u8ba1\u4e2d\u7684\u7d22\u5f15\u5b9e\u73b0\uff0c\u53c8\u4f1a\u4ea7\u751f\u591a\u79cd\u7684KV\u63a5\u53e3\u8bbe\u8ba1\u3002\u7d22\u5f15\u662f\u57fa\u4e8eKV\u505a\uff0c\u8fd8\u662f\u4e0b\u6c89\u5230KV\u4e2d\uff1f<\/p>\n<ul>\n<li>\u524d\u9762\u4e00\u79cd\u76f8\u5bf9\u6e05\u6670\uff0c\u4f46\u6027\u80fd\u65b9\u9762\u6709\u6240\u6298\u8877\uff0c\u7531\u4e8e\u7d22\u5f15\u7684\u521b\u5efa\u662f\u57fa\u4e8e\u7eaf\u7cb9\u7684KV\u63a5\u53e3\uff0cbulk load\u4e0d\u597d\u505a\uff0c\u5e76\u4e14\u7d22\u5f15\u672c\u8eab\u4e5f\u662f\u591a\u7248\u672c\u7684<\/li>\n<li>\u540e\u9762\u4e00\u79cd\u8bbe\u8ba1\uff0c\u7531\u4e8e\u5b58\u50a8\u5f15\u64ce\u5177\u6709\u4e86schema\u4fe1\u606f\uff0c\u7d22\u5f15\u53ef\u4ee5\u6709\u66f4\u591a\u7684\u4f18\u5316\u7a7a\u95f4\u3002\u4f8b\u5982\u7d22\u5f15\u53ef\u4ee5\u505a\u6210\u5355\u7248\u672c\u7684\uff08PostgreSQL\uff09\uff0c\u6307\u5411\u591a\u7248\u672c\u7684heap file\uff0c\u4ee5\u7701\u53bb\u591a\u7248\u672c\u7684\u5f00\u9500\uff1b\u4f8b\u5982\u50cfX-Engine\u90a3\u6837\uff0c\u5229\u7528LSM \u7684\u7279\u6027\u5b9e\u73b0\u66f4\u52a0\u9ad8\u6548\u7684Fast DDL<\/li>\n<\/ul>\n<p>\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\uff0c\u867d\u7136\u5927\u90e8\u5206\u6570\u636e\u5e93\u90fd\u6709KV\u5b58\u50a8\u8fd9\u4e2a\u62bd\u8c61\uff0c\u4f46\u4ecd\u7136\u5b58\u5728\u5f88\u5927\u7684\u8bbe\u8ba1\u7a7a\u95f4\uff0c\u4f8b\u5982\u5355\u673a\u7684KV\u662f\u5426\u9700\u8981\u652f\u6301\u4e8b\u52a1\uff0c\u662f\u5426\u9700\u8981\u611f\u77e5schema\uff0c\u662f\u5426\u9700\u8981\u66b4\u9732\u591a\u7248\u672c\u7684\u63a5\u53e3\u3002\u56e0\u6b64\uff0c\u4e0d\u80fd\u7b3c\u7edf\u5730\u8bf4\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u90fd\u559c\u6b22\u7528KV store\u3002<\/p>\n<p><strong>\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u4e3b\u8981\u7684\u5355\u673a\u5b58\u50a8\u5f15\u64ce<\/strong><\/h2>\n<p>1\u3001\u54c8\u5e0c\u5b58\u50a8\uff1ahash\u7684CRUD\u662f\u975e\u5e38\u5feb\u7684\u3002\u4f46\u7f3a\u70b9\u662f\u4e0d\u652f\u6301\u987a\u5e8f\u626b\u63cf\u3002bitcask\u662f\u4e00\u4e2a\u57fa\u4e8ehash\u8868\u7ed3\u6784\u7684\u5b58\u50a8\u7cfb\u7edf\u3002\u4ed6\u5c06\u5199\u64cd\u4f5c\uff08\u5305\u62ec\u5220\u9664\u6807\u8bc6\uff09\u8ffd\u52a0\u5230\u6587\u4ef6\u5c3e\u3002\u5e76\u5b9a\u671f\u5408\u5e76\u65b0\u8001\u6587\u4ef6&amp;\u8bb0\u5f55\u3002<\/p>\n<p>2\u3001B\u6811\uff1a\u65e2\u652f\u6301\u968f\u673a\u8bfb\u53d6\u53c8\u652f\u6301\u8303\u56f4\u67e5\u627e\u7684\u7cfb\u7edf\u3002\u67e5\u627e\u65f6\u95f4\u590d\u6742\u5ea6\u4e3alogd(n)\uff08d\u4e3a\u6bcf\u4e2a\u8282\u70b9\u7684\u51fa\u5ea6\uff09\u3002Mysql\u7684InnoDB\u7684\u5f15\u64ce\u548cOS\u7684\u6587\u4ef6\u7cfb\u7edf\u4f7f\u7528\u7684\u5c31\u662fB+\u6811\u3002\uff08\u4e3a\u4ec0\u4e48\u9009\u62e9\u4f7f\u7528B\u6811\u7684\u53d8\u79cdB+\u6811\uff0c\u8bfb\u8005\u6709\u5174\u8da3\u53ef\u4ee5\u53bb\u63a2\u7a76\u4e0b\u3002\u63d0\u793a\uff1a\u78c1\u76d8\u8bfb\u53d6\uff09<\/p>\n<p>3\u3001LSM\u6811(Log Structured Merge Tree)\uff1a\u7531B+\u6570\u6539\u8fdb\u800c\u6765\u3002\u5176\u601d\u60f3\u4e3a\uff1a\u5c06\u589e\u91cf\u5199\u64cd\u4f5c\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u8d85\u8fc7\u9608\u503c\u65f6\u5237\u5165\u78c1\u76d8\uff0c\u4ece\u800c\u51cf\u5c11\u968f\u673a\u5199\u78c1\u76d8\u64cd\u4f5c\u3002\u8bfb\u64cd\u4f5c\u5219\u9700\u8981\u5408\u5e76\u78c1\u76d8\u6570\u636e\u548c\u5185\u5b58\u4e2d\u7684\u5199\u64cd\u4f5c\u3002\u901a\u8fc7Memtable\/SSTable\u5b9e\u73b0\uff0c\u5b9e\u73b0\u7ec6\u8282\u5728\u6b64\u4e0d\u505a\u6df1\u5165\u63a2\u7a76\u3002\u6bd4\u8f83\u9002\u5408\u5199\u64cd\u4f5c\u8f83\u591a\u7684\u4e1a\u52a1\u573a\u666f\u3002BigTable\/HBase\/Cassandra\u4e2d\u7684\u5217\u7c07\u7684\u6570\u636e\u5b58\u50a8\u65b9\u5f0f\u91c7\u7528\u7684\u5373\u662fLSM\u6811\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u867d\u7136\u4e0d\u8bba\u662f\u5355\u673a\u6570\u636e\u5e93\uff08MySQL\u3001PostgreSQL\u7b49\u7b49\uff09\uff0c\u8fd8\u662f\u9898\u4e3b\u8bf4\u5230\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff08CockroachD [&hellip;]","protected":false},"author":1,"featured_media":30175,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/30172"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=30172"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/30172\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/30175"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=30172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=30172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=30172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}