{"id":33663,"date":"2023-06-09T11:44:42","date_gmt":"2023-06-09T03:44:42","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=33663"},"modified":"2023-07-31T00:27:43","modified_gmt":"2023-07-30T16:27:43","slug":"%e4%ba%8b%e5%8a%a1%e5%b9%b6%e5%8f%91%e6%8e%a7%e5%88%b6s2pl%e5%92%8cs2pl%e6%9c%89%e4%bd%95%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/33663.html","title":{"rendered":"\u4e8b\u52a1\u5e76\u53d1\u63a7\u5236s2pl\u548cs2pl\u6709\u4f55\u533a\u522b"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>2PL\uff082 Phase Locking\uff09, \u9501\u5206\u4e24\u9636\u6bb5\uff0c\u4e00\u9636\u6bb5\u7533\u8bf7\uff0c\u4e00\u9636\u6bb5\u91ca\u653e\uff1bS2PL\uff08Strict 2PL\uff09\uff0c\u57282PL\u7684\u57fa\u7840\u4e0a\uff0c\u5199\u9501\u4fdd\u6301\u5230\u4e8b\u52a1\u7ed3\u675f\uff1bSS2PL\uff08 Strong 2PL\uff09\uff0c\u57282PL\u7684\u57fa\u7840\u4e0a\uff0c\u8bfb\u5199\u9501\u90fd\u4fdd\u6301\u5230\u4e8b\u52a1\u7ed3\u675f\uff1bGen(SS2PL) \u2282 Gen(S2PL) \u2282 Gen(2PL)\uff0cGen(XXX)\u8868\u5f0f\u751f\u6210\u7684history\/schedule\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-33665\" decoding=\"async\" height=\"421\" sizes=\"(max-width: 680px) 100vw, 680px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/06\/\u6dfb\u52a0\u6807\u9898-19-4.png?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/06\/\u6dfb\u52a0\u6807\u9898-19-4.png?x-oss-process=image\/auto-orient,1\/format,webp 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/06\/\u6dfb\u52a0\u6807\u9898-19-4-300x186.png 300w\" width=\"680\"\/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001\u4e8b\u52a1\u5e76\u53d1\u63a7\u5236s2pl\u548cs2pl\u6709\u4f55\u533a\u522b<\/strong><\/h2>\n<p>2PL\uff082 Phase Locking\uff09, \u9501\u5206\u4e24\u9636\u6bb5\uff0c\u4e00\u9636\u6bb5\u7533\u8bf7\uff0c\u4e00\u9636\u6bb5\u91ca\u653e\uff1bS2PL\uff08Strict 2PL\uff09\uff0c\u57282PL\u7684\u57fa\u7840\u4e0a\uff0c\u5199\u9501\u4fdd\u6301\u5230\u4e8b\u52a1\u7ed3\u675f\uff1bSS2PL\uff08 Strong 2PL\uff09\uff0c\u57282PL\u7684\u57fa\u7840\u4e0a\uff0c\u8bfb\u5199\u9501\u90fd\u4fdd\u6301\u5230\u4e8b\u52a1\u7ed3\u675f\uff1bGen(SS2PL) \u2282 Gen(S2PL) \u2282 Gen(2PL)\uff0c<\/p>\n<p>Gen(XXX)\u8868\u5f0f\u751f\u6210\u7684history\/schedule\u3002<\/p>\n<p>\u7b80\u5355\u6765\u8bf42PL\u65e0\u6cd5\u4fdd\u8bc1\u4e8b\u52a1\u662f\u53ef\u6062\u590d\u7684\u3002 \u8fd9\u5c31\u662f\u5e38\u89c1\u7684\u810f\u8bfb\u5f02\u5e38\uff0c\u5373\u8bfb\u5230\u672a\u63d0\u4ea4\u4e8b\u52a1\u7684\u6570\u636e\uff0c\u5982\u679c\u8be5\u672a\u63d0\u4ea4\u4e8b\u52a1\u4e2d\u6b62\uff0c\u5219\u4f1a\u5bfc\u81f4\u5df2\u63d0\u4ea4\u4e8b\u52a1\u7684\u72b6\u6001\u4e0d\u53ef\u9760\u3002\u4f46\u6ce8\u610f\uff0c\u5b9e\u9645\u4e0a\u8fd9\u91cc\u7684\u9519\u8bef\u9519\u5728\u4e8b\u52a1T2\u4e0d\u8be5\u63d0\u4ea4\uff0c\u800c\u4e0d\u662f\u8bfb\u4e86\u672a\u63d0\u4ea4\u4e8b\u52a1\uff08\u4e5f\u53ef\u4ee5\u8bfb\u4e86\u4e0d\u63d0\u4ea4\uff09\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u8fd9\u4e00\u70b9\uff0c\u5f15\u5165\u4e86\u8c03\u5ea6\u7684\u53ef\u6062\u590d\u6027\uff0c\u5373\u5982\u679c\u4e8b\u52a1Ti\u4ece\u4e8b\u52a1Tj\u4e2d\u8bfb\u5230\u4e86\u5143\u7d20x\uff0c\u5728\u4e8b\u52a1Ti\u63d0\u4ea4\u524d\uff0c\u4e8b\u52a1Tj\u5fc5\u987b\u5df2\u63d0\u4ea4\u3002<\/p>\n<p>\u4fdd\u8bc1\u4e86\u53ef\u6062\u590d\u6027\u7684\u8c03\u5ea6\u624d\u662f\u6b63\u786e\u7684\u8c03\u5ea6\u3002\u8fdb\u4e00\u6b65\u4e3a\u4e86\u7b80\u5316\u6062\u590d\u96be\u5ea6\uff0c\u6709\u66f4\u9ad8\u7684\u7ea7\u522b\uff0c\u6bd4\u5982\u907f\u514d\u7ea7\u8054\u4e2d\u6b62\uff08avoid cascading abort\uff09\uff0c\u4e25\u683c\uff08strict\uff09\u3002<\/p>\n<p>\u5176\u4e2d\u4e25\u683c\u80fd\u4fdd\u8bc1\u4e8b\u52a1\u4e2d\u6b62\u7684\u9694\u79bb\u6027\uff0c\u5373\u4e8b\u52a1\u4e2d\u6b62\u53ea\u9700\u8981\u72ec\u7acb\u5730\u64a4\u9500\u81ea\u5df1\u7684\u4fee\u6539\uff0c\u4e0d\u9700\u8981\u7ba1\u5176\u4ed6\u4e8b\u52a1\u3002<\/p>\n<p>\u800c\u4e25\u683c\u6027\u57282PL\u4e2d\u7684\u5b9e\u73b0\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u6301\u6709\u5199\u9501\u76f4\u81f3\u4e8b\u52a1\u63d0\u4ea4\u3002<\/p>\n<p><strong>\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u4ec0\u4e48\u662f\u6570\u636e\u5e93<\/strong><\/h2>\n<p>\u6570\u636e\u5e93\u5c31\u662f\u82f1\u6587\u7684\u201cdatabase\u201d\u7ffb\u8bd1\u6765\u7684\uff0cdata + base\uff0c\u6545\u540d\u601d\u4e49\u5c31\u662f\u6570\u636e\u7684\u6839\u6e90\uff0c\u6570\u636e\u7684\u57fa\u7840\u3002\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8981\u6709\u6570\u636e\u5e93\u5462\uff0c\u6570\u636e\u5e93\u9996\u5148\u662f\u4e2a\u8ba1\u7b97\u673a\u8f6f\u4ef6\uff0c\u5728\u6240\u8c13\u6570\u636e\u5e93\u8bde\u751f\u4e4b\u524d\uff0c\u5e38\u7528\u65b9\u6cd5\u53ef\u80fd\u662f\u7a0b\u5e8f\u5458\u81ea\u5df1\u5199\u4e00\u4e2a\u5c0f\u7a0b\u5e8f\u6765\u5b8c\u6210\u6570\u636e\u5904\u7406\u5206\u6790\u8fd9\u6837\u7684\u5de5\u4f5c\u3002<\/p>\n<p>\u4f34\u968f\u7740\u8ba1\u7b97\u673a\u7684\u666e\u53ca\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u573a\u666f\u5f00\u59cb\u4f7f\u7528\u8ba1\u7b97\u673a\uff0c\u4ea7\u751f\u4e86\u8d8a\u6765\u8d8a\u591a\u7684\u6570\u636e\uff0c\u4e5f\u50ac\u751f\u4e86\u8d8a\u6765\u8d8a\u591a\u7684\u6570\u636e\u5206\u6790\u9700\u6c42\u3002\u4e3a\u4e86\u964d\u4f4e\u6570\u636e\u5206\u6790\u7684\u95e8\u69db\uff0c\u8ba9\u66f4\u591a\u4eba\u80fd\u591f\u66f4\u65b9\u4fbf\u9ad8\u6548\u5730\u7ba1\u7406\u5206\u6790\u6570\u636e\uff0c\u5de5\u7a0b\u5e08\u4eec\u5c31\u6253\u9020\u4e86\u4e00\u79cd\u4e13\u95e8\u7684\u8f6f\u4ef6\u6765\u5e2e\u52a9\u4eba\u4eec\u5bf9\u6570\u636e\u8fdb\u884c\u5408\u7406\u7684\u5b58\u50a8\u4ee5\u63d0\u9ad8\u5b58\u53d6\u6548\u7387\uff0c\u63d0\u4f9b\u6613\u7528\u7684\u63a5\u53e3\u548c\u4e30\u5bcc\u7684\u5206\u6790\u7b97\u6cd5\u4ee5\u65b9\u4fbf\u4f7f\u7528\uff0c\u96c6\u6210\u6709\u6548\u7684\u7ba1\u7406\u5de5\u5177\u4ee5\u63d0\u9ad8\u6570\u636e\u5b89\u5168\u6027\u7b49\u7b49\uff0c\u8fd9\u5c31\u662f\u6570\u636e\u5e93\uff0c\u4e5f\u88ab\u79f0\u4e3a\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff0cDatabase management system\uff09\u3002<\/p>\n<p>\u6570\u636e\u5e93\u662f\u4e00\u6574\u5957\u6570\u636e\u7ba1\u7406\u4f53\u7cfb\uff0c\u5305\u62ec\u6570\u636e\u5b58\u50a8\u7684\u6a21\u578b\u3001\u6570\u636e\u7ec4\u7ec7\u7684\u67b6\u6784\u3001\u6570\u636e\u5206\u6790\u7684\u7b97\u6cd5\u3001\u6570\u636e\u7ba1\u7406\u7684\u5de5\u5177\u4ee5\u53ca\u6570\u636e\u8bbf\u95ee\u7684\u63a5\u53e3\u7b49\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"2PL\uff082 Phase Locking\uff09, \u9501\u5206\u4e24\u9636\u6bb5\uff0c\u4e00\u9636\u6bb5\u7533\u8bf7\uff0c\u4e00\u9636\u6bb5\u91ca\u653e\uff1bS2PL\uff08Strict 2PL [&hellip;]","protected":false},"author":1,"featured_media":33665,"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\/33663"}],"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=33663"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/33663\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/33665"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=33663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=33663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=33663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}