{"id":97204,"date":"2024-10-20T15:52:16","date_gmt":"2024-10-20T07:52:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97204\/"},"modified":"2024-10-20T15:52:17","modified_gmt":"2024-10-20T07:52:17","slug":"redis-cas%e6%93%8d%e4%bd%9c%e5%ae%8c%e6%95%b4%e4%bb%8b%e7%b4%b9%ef%bc%88redis%e7%9a%84cas%e8%a9%b3%e8%a7%a3%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97204\/","title":{"rendered":"Redis CAS\u64cd\u4f5c\u5b8c\u6574\u4ecb\u7d39\uff08redis\u7684cas\u8a73\u89e3\uff09"},"content":{"rendered":"<h1 id=\"redis-cas%e6%93%8d%e4%bd%9c%e5%ae%8c%e6%95%b4%e4%bb%8b%e7%b4%b9%ef%bc%88redis%e7%9a%84cas%e8%a9%b3%e8%a7%a3%ef%bc%89-zvfFIXfSWZ\">Redis CAS\u64cd\u4f5c\u5b8c\u6574\u4ecb\u7d39\uff08Redis\u7684CAS\u8a73\u89e3\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u5176\u4e2d\uff0cCAS\uff08Compare and Swap\uff09\u64cd\u4f5c\u662f\u4e00\u7a2e\u5e38\u7528\u7684\u6280\u8853\uff0c\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u4e2d\u7684CAS\u64cd\u4f5c\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afcas%e6%93%8d%e4%bd%9c%ef%bc%9f-zvfFIXfSWZ\">\u4ec0\u9ebc\u662fCAS\u64cd\u4f5c\uff1f<\/h2>\n<p>CAS\u64cd\u4f5c\u662f\u4e00\u7a2e\u539f\u5b50\u64cd\u4f5c\uff0c\u4e3b\u8981\u7528\u65bc\u89e3\u6c7a\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u7af6\u722d\u689d\u4ef6\u3002\u5b83\u7684\u57fa\u672c\u539f\u7406\u662f\uff1a\u5728\u66f4\u65b0\u67d0\u500b\u503c\u4e4b\u524d\uff0c\u5148\u6aa2\u67e5\u8a72\u503c\u662f\u5426\u8207\u9810\u671f\u7684\u503c\u76f8\u540c\u3002\u5982\u679c\u76f8\u540c\uff0c\u5247\u9032\u884c\u66f4\u65b0\uff1b\u5982\u679c\u4e0d\u540c\uff0c\u5247\u4e0d\u9032\u884c\u66f4\u65b0\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6578\u64da\u7684\u4e0d\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"redis%e4%b8%ad%e7%9a%84cas%e6%93%8d%e4%bd%9c-zvfFIXfSWZ\">Redis\u4e2d\u7684CAS\u64cd\u4f5c<\/h2>\n<p>\u5728Redis\u4e2d\uff0cCAS\u64cd\u4f5c\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528<strong>WATCH<\/strong>\u547d\u4ee4\u4f86\u5be6\u73fe\u7684\u3002WATCH\u547d\u4ee4\u53ef\u4ee5\u76e3\u8996\u4e00\u500b\u6216\u591a\u500b\u9375\uff0c\u7576\u9019\u4e9b\u9375\u7684\u503c\u5728\u4e8b\u52d9\u57f7\u884c\u4e4b\u524d\u88ab\u4fee\u6539\u6642\uff0c\u4e8b\u52d9\u5c07\u6703\u5931\u6557\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8watch%e5%91%bd%e4%bb%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%ad%a5%e9%a9%9f-zvfFIXfSWZ\">\u4f7f\u7528WATCH\u547d\u4ee4\u7684\u57fa\u672c\u6b65\u9a5f<\/h3>\n<ol>\n<li>\u4f7f\u7528WATCH\u547d\u4ee4\u76e3\u8996\u4e00\u500b\u6216\u591a\u500b\u9375\u3002<\/li>\n<li>\u6aa2\u67e5\u9375\u7684\u7576\u524d\u503c\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8a08\u7b97\u3002<\/li>\n<li>\u4f7f\u7528MULTI\u547d\u4ee4\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\u3002<\/li>\n<li>\u57f7\u884cSET\u547d\u4ee4\u4f86\u66f4\u65b0\u9375\u7684\u503c\u3002<\/li>\n<li>\u4f7f\u7528EXEC\u547d\u4ee4\u63d0\u4ea4\u4e8b\u52d9\u3002<\/li>\n<\/ol>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-zvfFIXfSWZ\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<pre><code>redis-cli\nWATCH mykey\nGET mykey\n# \u5047\u8a2d\u7576\u524d\u503c\u70ba 10\nMULTI\nSET mykey 20\nEXEC\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u9996\u5148\u4f7f\u7528WATCH\u547d\u4ee4\u76e3\u8996\u9375mykey\u3002\u63a5\u8457\u7372\u53d6mykey\u7684\u7576\u524d\u503c\uff0c\u5982\u679c\u7576\u524d\u503c\u70ba10\uff0c\u5247\u5728\u4e8b\u52d9\u4e2d\u5c07\u5176\u66f4\u65b0\u70ba20\u3002\u5982\u679c\u5728EXEC\u57f7\u884c\u4e4b\u524d\uff0cmykey\u7684\u503c\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u4fee\u6539\uff0c\u5247EXEC\u5c07\u6703\u5931\u6557\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6578\u64da\u7684\u4e0d\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"cas%e6%93%8d%e4%bd%9c%e7%9a%84%e5%84%aa%e5%8b%a2-zvfFIXfSWZ\">CAS\u64cd\u4f5c\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff1a<\/strong>CAS\u64cd\u4f5c\u78ba\u4fdd\u4e86\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u907f\u514d\u4e86\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u7af6\u722d\u689d\u4ef6\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6027\uff1a<\/strong>\u4f7f\u7528WATCH\u547d\u4ee4\u53ef\u4ee5\u7c21\u5316\u4e8b\u52d9\u7684\u5be6\u73fe\uff0c\u7121\u9700\u624b\u52d5\u9396\u5b9a\u8cc7\u6e90\u3002<\/li>\n<li><strong>\u6027\u80fd\uff1a<\/strong>\u76f8\u8f03\u65bc\u50b3\u7d71\u7684\u9396\u6a5f\u5236\uff0cCAS\u64cd\u4f5c\u5728\u6027\u80fd\u4e0a\u66f4\u5177\u512a\u52e2\uff0c\u56e0\u70ba\u5b83\u6e1b\u5c11\u4e86\u4e0a\u4e0b\u6587\u5207\u63db\u7684\u958b\u92b7\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-zvfFIXfSWZ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5118\u7ba1CAS\u64cd\u4f5c\u6709\u5176\u512a\u52e2\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u983b\u7e41\u5730\u767c\u751f\u7af6\u722d\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u4e8b\u52d9\u5931\u6557\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li>\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e0b\uff0cWATCH\u547d\u4ee4\u7684\u4f7f\u7528\u9700\u8981\u8b39\u614e\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6027\u80fd\u640d\u8017\u3002<\/li>\n<li>\u9700\u8981\u8003\u616e\u5230WATCH\u547d\u4ee4\u7684\u5f71\u97ff\u7bc4\u570d\uff0c\u78ba\u4fdd\u76e3\u8996\u7684\u9375\u662f\u6b63\u78ba\u7684\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zvfFIXfSWZ\">\u7e3d\u7d50<\/h2>\n<p>Redis\u4e2d\u7684CAS\u64cd\u4f5c\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u4e00\u81f4\u6027\u89e3\u6c7a\u65b9\u6848\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\u3002\u901a\u904e\u4f7f\u7528WATCH\u547d\u4ee4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u7684\u4e0d\u4e00\u81f4\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u548c\u9ad8\u53ef\u7528\u6027\u7684\u61c9\u7528\uff0c\u4e86\u89e3\u548c\u638c\u63e1CAS\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u5353\u8d8a\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3Redis\u7684CAS\u64cd\u4f5c\uff0c\u63a2\u7d22\u5176\u539f\u7406\u3001\u4f7f\u7528\u5834\u666f\u53ca\u5be6\u73fe\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u548c\u6027\u80fd\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-97204","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97204","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=97204"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97204\/revisions"}],"predecessor-version":[{"id":97205,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97204\/revisions\/97205"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}