{"id":187206,"date":"2024-11-11T12:20:17","date_gmt":"2024-11-11T04:20:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187206\/"},"modified":"2024-11-11T12:20:18","modified_gmt":"2024-11-11T04:20:18","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e5%8e%9f%e7%90%86%e7%b0%a1%e8%bf%b0-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e4%ba%8b%e5%8b%99%e7%9a%84%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187206\/","title":{"rendered":"\u6578\u64da\u5eab\u4e8b\u52d9\u539f\u7406\u7c21\u8ff0 (\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u7684\u539f\u7406)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e5%8e%9f%e7%90%86%e7%b0%a1%e8%bf%b0-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e4%ba%8b%e5%8b%99%e7%9a%84%e5%8e%9f%e7%90%86-EyLQzLANdP\">\u6578\u64da\u5eab\u4e8b\u52d9\u539f\u7406\u7c21\u8ff0 (\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u7684\u539f\u7406)<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\uff0c\u4e8b\u52d9\uff08Transaction\uff09\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\u3002\u4e8b\u52d9\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u3002\u672c\u6587\u5c07\u7c21\u8981\u4ecb\u7d39\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u539f\u7406\u53ca\u5176\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%ef%bc%9f-EyLQzLANdP\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u4e8b\u52d9\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u9019\u7a2e\u7279\u6027\u88ab\u7a31\u70ba\u539f\u5b50\u6027\uff08Atomicity\uff09\u3002\u4e8b\u52d9\u901a\u5e38\u6d89\u53ca\u5c0d\u6578\u64da\u5eab\u7684\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\uff0c\u4e26\u4e14\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\uff0c\u4e8b\u52d9\u7684\u72c0\u614b\u5fc5\u9808\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84acid%e7%89%b9%e6%80%a7-EyLQzLANdP\">\u4e8b\u52d9\u7684ACID\u7279\u6027<\/h2>\n<p>\u4e8b\u52d9\u7684\u53ef\u9760\u6027\u901a\u5e38\u7528ACID\u7279\u6027\u4f86\u63cf\u8ff0\uff0c\u9019\u56db\u500b\u7279\u6027\u5206\u5225\u662f\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09<\/strong>\uff1a\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u5b8c\u6210\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff08Consistency\uff09<\/strong>\uff1a\u4e8b\u52d9\u7684\u57f7\u884c\u5fc5\u9808\u4f7f\u6578\u64da\u5eab\u5f9e\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e4b\u9593\u4e0d\u61c9\u4e92\u76f8\u5e72\u64fe\uff0c\u6bcf\u500b\u4e8b\u52d9\u7684\u57f7\u884c\u7d50\u679c\u5c0d\u5176\u4ed6\u4e8b\u52d9\u662f\u4e0d\u53ef\u898b\u7684\uff0c\u76f4\u5230\u4e8b\u52d9\u5b8c\u6210\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u61c9\u6c38\u4e45\u4fdd\u5b58\uff0c\u5373\u4f7f\u7cfb\u7d71\u5d29\u6f70\u4e5f\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e5%af%a6%e7%8f%be-EyLQzLANdP\">\u4e8b\u52d9\u7684\u5be6\u73fe<\/h2>\n<p>\u6578\u64da\u5eab\u7cfb\u7d71\u901a\u5e38\u4f7f\u7528\u65e5\u8a8c\uff08Log\uff09\u4f86\u5be6\u73fe\u4e8b\u52d9\u7684ACID\u7279\u6027\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u958b\u59cb\u6642\uff0c\u7cfb\u7d71\u6703\u8a18\u9304\u4e0b\u6240\u6709\u7684\u64cd\u4f5c\uff0c\u9019\u6a23\u5728\u767c\u751f\u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u901a\u904e\u56de\u6efe\uff08Rollback\uff09\u64cd\u4f5c\u4f86\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<pre><code>\nBEGIN TRANSACTION;\n\nUPDATE accounts SET balance = balance - 100 WHERE account_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE account_id = 2;\n\nCOMMIT;\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u5169\u500b\u66f4\u65b0\u64cd\u4f5c\u88ab\u5305\u88f9\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u3002\u5982\u679c\u5176\u4e2d\u4e00\u500b\u64cd\u4f5c\u5931\u6557\uff0c\u6574\u500b\u4e8b\u52d9\u5c07\u88ab\u56de\u6efe\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-EyLQzLANdP\">\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225<\/h2>\n<p>\u70ba\u4e86\u5be6\u73fe\u4e8b\u52d9\u7684\u9694\u96e2\u6027\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u9694\u96e2\u7d1a\u5225\u3002\u9019\u4e9b\u9694\u96e2\u7d1a\u5225\u5b9a\u7fa9\u4e86\u4e8b\u52d9\u4e4b\u9593\u7684\u53ef\u898b\u6027\u548c\u5e72\u64fe\u7a0b\u5ea6\u3002\u4e3b\u8981\u7684\u9694\u96e2\u7d1a\u5225\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u4e8b\u52d9\u672a\u63d0\u4ea4\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u591a\u6b21\u8b80\u53d6\u540c\u4e00\u6578\u64da\u6642\uff0c\u7d50\u679c\u662f\u4e00\u81f4\u7684\u3002<\/li>\n<li><strong>\u4e32\u884c\u5316\uff08Serializable\uff09<\/strong>\uff1a\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u4e8b\u52d9\u5b8c\u5168\u4e32\u884c\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-EyLQzLANdP\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u662f\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u95dc\u9375\u6a5f\u5236\u3002\u901a\u904e\u7406\u89e3\u4e8b\u52d9\u7684ACID\u7279\u6027\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8a2d\u8a08\u548c\u7ba1\u7406\u6578\u64da\u5eab\u61c9\u7528\u3002\u96a8\u8457\u6578\u64da\u5eab\u6280\u8853\u7684\u767c\u5c55\uff0c\u5c0d\u4e8b\u52d9\u7684\u7406\u89e3\u548c\u61c9\u7528\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u4e8b\u52d9\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u5c07\u6709\u52a9\u65bc\u60a8\u5728\u6578\u64da\u7ba1\u7406\u65b9\u9762\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7c21\u8ff0\u6578\u64da\u5eab\u4e8b\u52d9\u539f\u7406\uff0c\u63a2\u8a0e\u4e8b\u52d9\u7684ACID\u7279\u6027\u53ca\u5176\u5728\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-187206","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187206","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=187206"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187206\/revisions"}],"predecessor-version":[{"id":187207,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187206\/revisions\/187207"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}