{"id":187196,"date":"2024-11-11T12:15:27","date_gmt":"2024-11-11T04:15:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187196\/"},"modified":"2024-11-11T12:15:28","modified_gmt":"2024-11-11T04:15:28","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e7%b0%a1%e4%bb%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187196\/","title":{"rendered":"\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u7c21\u4ecb (\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u8655\u7406)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e7%b0%a1%e4%bb%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86-hHuipiBddD\">\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u7c21\u4ecb (\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u8655\u7406)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u8655\u7406\u6210\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u91cd\u8981\u6a5f\u5236\u3002\u7121\u8ad6\u662f\u91d1\u878d\u4ea4\u6613\u3001\u96fb\u5b50\u5546\u52d9\u9084\u662f\u793e\u4ea4\u5a92\u9ad4\u5e73\u53f0\uff0c\u4e8b\u52d9\u8655\u7406\u90fd\u5728\u80cc\u5f8c\u9ed8\u9ed8\u652f\u6301\u8457\u5404\u7a2e\u61c9\u7528\u7684\u904b\u884c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5\u3001\u7279\u6027\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\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-hHuipiBddD\">\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\u57f7\u884c\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\uff0c\u5f9e\u800c\u4fdd\u8b49\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u4e8b\u52d9\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u5728\u9762\u5c0d\u932f\u8aa4\u6216\u7cfb\u7d71\u6545\u969c\u6642\uff0c\u80fd\u5920\u4fdd\u6301\u4e00\u81f4\u7684\u72c0\u614b\u3002\u4e8b\u52d9\u901a\u5e38\u9075\u5faaACID\u539f\u5247\uff0c\u5373\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u548c\u6301\u4e45\u6027\u3002<\/p>\n<h3 id=\"acid%e5%8e%9f%e5%89%87-hHuipiBddD\">ACID\u539f\u5247<\/h3>\n<ul>\n<li><strong>\u539f\u5b50\u6027 (Atomicity)<\/strong>: \u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u5b8c\u6210\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u4e8b\u52d9\u4e2d\u7684\u67d0\u4e00\u90e8\u5206\u5931\u6557\uff0c\u6574\u500b\u4e8b\u52d9\u5c07\u88ab\u56de\u6efe\uff0c\u6578\u64da\u5eab\u5c07\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027 (Consistency)<\/strong>: \u4e8b\u52d9\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\u9019\u610f\u5473\u8457\u5728\u4e8b\u52d9\u57f7\u884c\u524d\u5f8c\uff0c\u6578\u64da\u5eab\u7684\u7d04\u675f\u689d\u4ef6\u5fc5\u9808\u5f97\u5230\u6eff\u8db3\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027 (Isolation)<\/strong>: \u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e4b\u9593\u4e0d\u61c9\u4e92\u76f8\u5e72\u64fe\u3002\u9019\u610f\u5473\u8457\u5373\u4f7f\u591a\u500b\u4e8b\u52d9\u540c\u6642\u57f7\u884c\uff0c\u6bcf\u500b\u4e8b\u52d9\u90fd\u61c9\u8a72\u611f\u89ba\u5230\u81ea\u5df1\u662f\u552f\u4e00\u5728\u57f7\u884c\u7684\u4e8b\u52d9\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027 (Durability)<\/strong>: \u4e00\u65e6\u4e8b\u52d9\u6210\u529f\u57f7\u884c\uff0c\u5176\u7d50\u679c\u61c9\u8a72\u662f\u6c38\u4e45\u6027\u7684\uff0c\u5373\u4f7f\u7cfb\u7d71\u5d29\u6f70\u6216\u6545\u969c\uff0c\u6578\u64da\u4e5f\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e8%99%95%e7%90%86%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-hHuipiBddD\">\u4e8b\u52d9\u8655\u7406\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u3002\u4f8b\u5982\uff0c\u5728\u9280\u884c\u7cfb\u7d71\u4e2d\uff0c\u8f49\u8cec\u64cd\u4f5c\u6d89\u53ca\u5f9e\u4e00\u500b\u8cec\u6236\u6263\u6b3e\u548c\u5411\u53e6\u4e00\u500b\u8cec\u6236\u5b58\u6b3e\u3002\u9019\u5169\u500b\u64cd\u4f5c\u5fc5\u9808\u4f5c\u70ba\u4e00\u500b\u4e8b\u52d9\u4f86\u57f7\u884c\uff0c\u4ee5\u78ba\u4fdd\u8cc7\u91d1\u4e0d\u6703\u5728\u8f49\u8cec\u904e\u7a0b\u4e2d\u4e1f\u5931\u3002<\/p>\n<pre><code>BEGIN TRANSACTION;\n    UPDATE Accounts SET balance = balance - 100 WHERE account_id = 'A123';\n    UPDATE Accounts SET balance = balance + 100 WHERE account_id = 'B456';\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u53ea\u6709\u7576\u5169\u500b\u66f4\u65b0\u64cd\u4f5c\u90fd\u6210\u529f\u6642\uff0c\u4e8b\u52d9\u624d\u6703\u63d0\u4ea4\u3002\u5982\u679c\u5176\u4e2d\u4e00\u500b\u64cd\u4f5c\u5931\u6557\uff0c\u5247\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-hHuipiBddD\">\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\u6c7a\u5b9a\u4e86\u4e8b\u52d9\u4e4b\u9593\u7684\u53ef\u898b\u6027\u548c\u4e92\u52d5\u7a0b\u5ea6\u3002\u4e3b\u8981\u7684\u9694\u96e2\u7d1a\u5225\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u672a\u63d0\u4ea4 (Read Uncommitted)<\/strong>: \u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u4e8b\u52d9\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u53ef\u80fd\u5c0e\u81f4\u9ad2\u8b80\u3002<\/li>\n<li><strong>\u8b80\u5df2\u63d0\u4ea4 (Read Committed)<\/strong>: \u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u907f\u514d\u4e86\u9ad2\u8b80\uff0c\u4f46\u53ef\u80fd\u6703\u51fa\u73fe\u4e0d\u53ef\u91cd\u8907\u8b80\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80 (Repeatable Read)<\/strong>: \u5728\u4e8b\u52d9\u57f7\u884c\u671f\u9593\uff0c\u8b80\u53d6\u7684\u6578\u64da\u4e0d\u6703\u6539\u8b8a\uff0c\u907f\u514d\u4e86\u4e0d\u53ef\u91cd\u8907\u8b80\uff0c\u4f46\u53ef\u80fd\u6703\u51fa\u73fe\u5e7b\u8b80\u3002<\/li>\n<li><strong>\u5e8f\u5217\u5316 (Serializable)<\/strong>: \u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u6240\u6709\u4e8b\u52d9\u6309\u5e8f\u5217\u5316\u7684\u65b9\u5f0f\u57f7\u884c\uff0c\u5b8c\u5168\u907f\u514d\u4e86\u5e7b\u8b80\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-hHuipiBddD\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u662f\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u95dc\u9375\u6280\u8853\u3002\u901a\u904e\u9075\u5faaACID\u539f\u5247\uff0c\u6578\u64da\u5eab\u80fd\u5920\u5728\u9762\u5c0d\u932f\u8aa4\u548c\u6545\u969c\u6642\u4fdd\u6301\u7a69\u5b9a\u6027\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u61c9\u7528\u5834\u666f\u7684\u591a\u6a23\u5316\uff0c\u5c0d\u65bc\u4e8b\u52d9\u8655\u7406\u7684\u9700\u6c42\u4e5f\u65e5\u76ca\u589e\u52a0\u3002\u4e86\u89e3\u4e8b\u52d9\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5\u548c\u5be6\u969b\u61c9\u7528\uff0c\u5c0d\u65bc\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u4f86\u8aaa\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u4e8b\u52d9\u8655\u7406\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u5305\u62ec\u4e8b\u52d9\u7684\u7279\u6027\u3001ACID\u539f\u5247\u53ca\u5176\u5728\u6578\u64da\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-187196","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187196","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=187196"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187196\/revisions"}],"predecessor-version":[{"id":187197,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187196\/revisions\/187197"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}