{"id":163533,"date":"2024-11-05T00:18:20","date_gmt":"2024-11-04T16:18:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163533\/"},"modified":"2024-11-05T00:18:21","modified_gmt":"2024-11-04T16:18:21","slug":"%e8%a7%a3%e6%b1%baredis%e7%ab%b6%e7%88%ad%e5%8f%8a%e6%97%a9%e6%8e%a1%e5%8f%96%e8%a1%8c%e5%8b%95%ef%bc%88redis%e7%ab%b6%e7%88%ad%e6%80%8e%e9%ba%bc%e8%a7%a3%e6%b1%ba%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163533\/","title":{"rendered":"\u89e3\u6c7aRedis\u7af6\u722d\u53ca\u65e9\u63a1\u53d6\u884c\u52d5\uff08redis\u7af6\u722d\u600e\u9ebc\u89e3\u6c7a\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%baredis%e7%ab%b6%e7%88%ad%e5%8f%8a%e6%97%a9%e6%8e%a1%e5%8f%96%e8%a1%8c%e5%8b%95-ZEAFXTxBxg\">\u89e3\u6c7aRedis\u7af6\u722d\u53ca\u65e9\u63a1\u53d6\u884c\u52d5<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u8655\u7406\u7b49\u5834\u666f\u3002\u7136\u800c\uff0c\u96a8\u8457\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u8a2a\u554fRedis\uff0c\u7af6\u722d\u689d\u4ef6\uff08Race Condition\uff09\u554f\u984c\u96a8\u4e4b\u800c\u4f86\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6027\u548c\u61c9\u7528\u7a0b\u5f0f\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u7af6\u722d\u7684\u6210\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u53ca\u65e9\u63a1\u53d6\u884c\u52d5\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e7%ab%b6%e7%88%ad%e6%a2%9d%e4%bb%b6%ef%bc%9f-ZEAFXTxBxg\">\u4ec0\u9ebc\u662fRedis\u7af6\u722d\u689d\u4ef6\uff1f<\/h2>\n<p>\u7af6\u722d\u689d\u4ef6\u662f\u6307\u5728\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u6642\uff0c\u56e0\u70ba\u57f7\u884c\u9806\u5e8f\u7684\u4e0d\u540c\u800c\u5c0e\u81f4\u7684\u7d50\u679c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002\u5728Redis\u4e2d\uff0c\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u5c0d\u540c\u4e00\u9375\u9032\u884c\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\u6642\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u5169\u500b\u5ba2\u6236\u7aef\u540c\u6642\u8b80\u53d6\u4e00\u500b\u9375\u7684\u503c\uff0c\u7136\u5f8c\u6839\u64da\u8a72\u503c\u9032\u884c\u8a08\u7b97\u4e26\u5beb\u56deRedis\uff0c\u6700\u7d42\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n<h2 id=\"redis%e7%ab%b6%e7%88%ad%e6%a2%9d%e4%bb%b6%e7%9a%84%e6%88%90%e5%9b%a0-ZEAFXTxBxg\">Redis\u7af6\u722d\u689d\u4ef6\u7684\u6210\u56e0<\/h2>\n<ul>\n<li><strong>\u591a\u7dda\u7a0b\u8a2a\u554f\uff1a<\/strong>\u7576\u591a\u500b\u7dda\u7a0b\u6216\u9032\u7a0b\u540c\u6642\u8a2a\u554fRedis\u6642\uff0c\u82e5\u6c92\u6709\u9069\u7576\u7684\u540c\u6b65\u6a5f\u5236\uff0c\u5c07\u6703\u5c0e\u81f4\u7af6\u722d\u689d\u4ef6\u3002<\/li>\n<li><strong>\u7f3a\u4e4f\u539f\u5b50\u64cd\u4f5c\uff1a<\/strong>\u67d0\u4e9b\u64cd\u4f5c\u5728Redis\u4e2d\u4e26\u4e0d\u662f\u539f\u5b50\u7684\uff0c\u4f8b\u5982\u8b80\u53d6-\u8a08\u7b97-\u5beb\u5165\u7684\u904e\u7a0b\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u5728\u64cd\u4f5c\u904e\u7a0b\u4e2d\u53ef\u80fd\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u4fee\u6539\u3002<\/li>\n<li><strong>\u7db2\u7d61\u5ef6\u9072\uff1a<\/strong>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u7db2\u7d61\u5ef6\u9072\u53ef\u80fd\u5c0e\u81f4\u4e0d\u540c\u5ba2\u6236\u7aef\u7684\u64cd\u4f5c\u9806\u5e8f\u4e0d\u4e00\u81f4\uff0c\u9032\u800c\u5f15\u767c\u7af6\u722d\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%baredis%e7%ab%b6%e7%88%ad%e6%a2%9d%e4%bb%b6%e7%9a%84%e6%96%b9%e6%b3%95-ZEAFXTxBxg\">\u89e3\u6c7aRedis\u7af6\u722d\u689d\u4ef6\u7684\u65b9\u6cd5<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8redis%e7%9a%84%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-ZEAFXTxBxg\">1. \u4f7f\u7528Redis\u7684\u539f\u5b50\u64cd\u4f5c<\/h3>\n<p>Redis\u63d0\u4f9b\u4e86\u4e00\u4e9b\u539f\u5b50\u64cd\u4f5c\uff0c\u4f8b\u5982<code>INCR<\/code>\u548c<code>DECR<\/code>\uff0c\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u5728\u4e0d\u9700\u8981\u984d\u5916\u9396\u7684\u60c5\u6cc1\u4e0b\u5b89\u5168\u5730\u5c0d\u6578\u64da\u9032\u884c\u589e\u6e1b\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>INCR mycounter<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u64cd\u4f5c\u78ba\u4fdd\u4e86\u8a08\u6578\u5668\u7684\u6b63\u78ba\u6027\uff0c\u7121\u8ad6\u6709\u591a\u5c11\u5ba2\u6236\u7aef\u540c\u6642\u8a2a\u554f\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99-ZEAFXTxBxg\">2. \u4f7f\u7528\u4e8b\u52d9<\/h3>\n<p>Redis\u7684\u4e8b\u52d9\u6a5f\u5236\u53ef\u4ee5\u901a\u904e<code>MULTI<\/code>\u548c<code>EXEC<\/code>\u547d\u4ee4\u4f86\u5be6\u73fe\u3002\u9019\u6a23\u53ef\u4ee5\u5c07\u591a\u500b\u547d\u4ee4\u6253\u5305\u5728\u4e00\u8d77\uff0c\u78ba\u4fdd\u5b83\u5011\u4f5c\u70ba\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\u57f7\u884c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nMULTI\nSET key1 value1\nSET key2 value2\nEXEC\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u5176\u4ed6\u5ba2\u6236\u7aef\u5c0d\u9019\u4e9b\u9375\u7684\u4fee\u6539\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e9%8e%96-ZEAFXTxBxg\">3. \u4f7f\u7528\u9396<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u9396\u662f\u89e3\u6c7a\u7af6\u722d\u689d\u4ef6\u7684\u6709\u6548\u65b9\u6cd5\u3002\u53ef\u4ee5\u4f7f\u7528Redis\u7684<code>SETNX<\/code>\u547d\u4ee4\u4f86\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nSETNX lock_key 1\n<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba1\uff0c\u5247\u7372\u5f97\u9396\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u6301\u6709\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac-ZEAFXTxBxg\">4. \u4f7f\u7528Lua\u8173\u672c<\/h3>\n<p>Redis\u652f\u6301Lua\u8173\u672c\uff0c\u9019\u4f7f\u5f97\u53ef\u4ee5\u5c07\u591a\u500b\u64cd\u4f5c\u5c01\u88dd\u5728\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\u4e2d\u57f7\u884c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u5176\u4ed6\u5ba2\u6236\u7aef\u7684\u5e72\u64fe\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nEVAL \"return redis.call('INCR', KEYS[1])\" 1 mycounter\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ZEAFXTxBxg\">\u7d50\u8ad6<\/h2>\n<p>\u89e3\u6c7aRedis\u7af6\u722d\u689d\u4ef6\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5f0f\u7a69\u5b9a\u6027\u548c\u6578\u64da\u4e00\u81f4\u6027\u7684\u95dc\u9375\u3002\u901a\u904e\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\u3001\u4e8b\u52d9\u3001\u9396\u548cLua\u8173\u672c\u7b49\u6280\u8853\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u7af6\u722d\u689d\u4ef6\u7684\u5f71\u97ff\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5f0f\u7684\u64f4\u5c55\u548c\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\uff0c\u53ca\u65e9\u63a1\u53d6\u884c\u52d5\u4ee5\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\u5c07\u8b8a\u5f97\u6108\u52a0\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6709\u6548\u89e3\u6c7aRedis\u7af6\u722d\u7684\u65b9\u6cd5\uff0c\u53ca\u65e9\u63a1\u53d6\u884c\u52d5\u4ee5\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u548c\u7a69\u5b9a\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-163533","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163533","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=163533"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163533\/revisions"}],"predecessor-version":[{"id":163534,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163533\/revisions\/163534"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163533"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163533"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}