{"id":134517,"date":"2024-10-31T00:49:23","date_gmt":"2024-10-30T16:49:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/134517\/"},"modified":"2024-10-31T00:49:23","modified_gmt":"2024-10-30T16:49:23","slug":"redis%e5%84%aa%e5%8c%96%e4%b9%8b%e8%b7%af%e6%af%94%e8%bc%83%e6%9b%b4%e6%96%b0%e6%a8%a1%e5%bc%8f%ef%bc%88redis%e6%af%94%e8%bc%83%e6%9b%b4%e6%96%b0%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/134517\/","title":{"rendered":"Redis\u512a\u5316\u4e4b\u8def\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\uff08redis\u6bd4\u8f03\u66f4\u65b0\uff09"},"content":{"rendered":"<h1 id=\"redis%e5%84%aa%e5%8c%96%e4%b9%8b%e8%b7%af%e6%af%94%e8%bc%83%e6%9b%b4%e6%96%b0%e6%a8%a1%e5%bc%8f%ef%bc%88redis%e6%af%94%e8%bc%83%e6%9b%b4%e6%96%b0%ef%bc%89-uahIUXJQtT\">Redis\u512a\u5316\u4e4b\u8def\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\uff08redis\u6bd4\u8f03\u66f4\u65b0\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u5305\u62ec\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u7b49\u3002\u96a8\u8457\u61c9\u7528\u9700\u6c42\u7684\u589e\u9577\uff0c\u5982\u4f55\u512a\u5316Redis\u7684\u6027\u80fd\u6210\u70ba\u4e86\u958b\u767c\u8005\u548c\u7cfb\u7d71\u67b6\u69cb\u5e2b\u7684\u91cd\u8981\u8ab2\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u7684\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u512a\u5316\u5efa\u8b70\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-uahIUXJQtT\">Redis\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\u662f\u4e00\u500b\u958b\u6e90\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u3002\u5176\u9ad8\u6027\u80fd\u7684\u7279\u6027\u4f7f\u5f97Redis\u80fd\u5920\u5728\u6beb\u79d2\u7d1a\u5225\u5167\u8655\u7406\u6578\u64da\u8acb\u6c42\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e6%af%94%e8%bc%83%e6%9b%b4%e6%96%b0%e6%a8%a1%e5%bc%8f%e7%9a%84%e5%ae%9a%e7%be%a9-uahIUXJQtT\">\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\u7684\u5b9a\u7fa9<\/h2>\n<p>\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\u662f\u6307\u5728\u66f4\u65b0\u6578\u64da\u6642\uff0c\u9996\u5148\u6aa2\u67e5\u7576\u524d\u6578\u64da\u7684\u72c0\u614b\uff0c\u7136\u5f8c\u6839\u64da\u6bd4\u8f03\u7d50\u679c\u6c7a\u5b9a\u662f\u5426\u9032\u884c\u66f4\u65b0\u3002\u9019\u7a2e\u6a21\u5f0f\u5728Redis\u4e2d\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u5f0f\u5be6\u73fe\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li id=\"%e4%bd%bf%e7%94%a8watch%e5%91%bd%e4%bb%a4%e9%80%b2%e8%a1%8c%e6%a8%82%e8%a7%80%e9%8e%96%e5%ae%9a-uahIUXJQtT\">\u4f7f\u7528WATCH\u547d\u4ee4\u9032\u884c\u6a02\u89c0\u9396\u5b9a<\/li>\n<li id=\"%e4%bd%bf%e7%94%a8get%e5%91%bd%e4%bb%a4%e6%aa%a2%e6%9f%a5%e7%95%b6%e5%89%8d%e5%80%bc-uahIUXJQtT\">\u4f7f\u7528GET\u547d\u4ee4\u6aa2\u67e5\u7576\u524d\u503c<\/li>\n<li id=\"%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac%e9%80%b2%e8%a1%8c%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-uahIUXJQtT\">\u4f7f\u7528Lua\u8173\u672c\u9032\u884c\u539f\u5b50\u64cd\u4f5c<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8watch%e5%91%bd%e4%bb%a4%e9%80%b2%e8%a1%8c%e6%a8%82%e8%a7%80%e9%8e%96%e5%ae%9a-uahIUXJQtT\">\u4f7f\u7528WATCH\u547d\u4ee4\u9032\u884c\u6a02\u89c0\u9396\u5b9a<\/h2>\n<p>Redis\u7684WATCH\u547d\u4ee4\u5141\u8a31\u7528\u6236\u5728\u9032\u884c\u66f4\u65b0\u4e4b\u524d\u76e3\u8996\u4e00\u500b\u6216\u591a\u500b\u9375\u3002\u5982\u679c\u5728\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u4e4b\u524d\uff0c\u9019\u4e9b\u9375\u7684\u503c\u767c\u751f\u4e86\u8b8a\u5316\uff0c\u5247\u66f4\u65b0\u5c07\u88ab\u62d2\u7d55\u3002\u9019\u7a2e\u65b9\u5f0f\u9069\u5408\u65bc\u9700\u8981\u9ad8\u4f75\u767c\u7684\u5834\u666f\u3002<\/p>\n<pre><code>WATCH key1 key2\nval1 = GET key1\nval2 = GET key2\n# \u6839\u64da\u696d\u52d9\u908f\u8f2f\u9032\u884c\u6bd4\u8f03\nif val1 == expected_value1 and val2 == expected_value2:\n    MULTI\n    SET key1 new_value1\n    SET key2 new_value2\n    EXEC\nelse:\n    UNWATCH\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8get%e5%91%bd%e4%bb%a4%e6%aa%a2%e6%9f%a5%e7%95%b6%e5%89%8d%e5%80%bc-uahIUXJQtT\">\u4f7f\u7528GET\u547d\u4ee4\u6aa2\u67e5\u7576\u524d\u503c<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9078\u64c7\u5728\u66f4\u65b0\u4e4b\u524d\u4f7f\u7528GET\u547d\u4ee4\u4f86\u6aa2\u67e5\u7576\u524d\u503c\u3002\u9019\u7a2e\u65b9\u6cd5\u96d6\u7136\u7c21\u55ae\uff0c\u4f46\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e0b\u53ef\u80fd\u6703\u5c0e\u81f4\u7af6\u722d\u689d\u4ef6\u3002<\/p>\n<pre><code>current_value = GET key\nif current_value == expected_value:\n    SET key new_value\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac%e9%80%b2%e8%a1%8c%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-uahIUXJQtT\">\u4f7f\u7528Lua\u8173\u672c\u9032\u884c\u539f\u5b50\u64cd\u4f5c<\/h2>\n<p>Lua\u8173\u672c\u53ef\u4ee5\u5728Redis\u4e2d\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c\uff0c\u9019\u610f\u5473\u8457\u6574\u500b\u8173\u672c\u5c07\u4f5c\u70ba\u4e00\u500b\u55ae\u4f4d\u57f7\u884c\uff0c\u907f\u514d\u4e86\u4e2d\u9593\u72c0\u614b\u7684\u554f\u984c\u3002\u9019\u5c0d\u65bc\u9700\u8981\u591a\u500b\u64cd\u4f5c\u7684\u5834\u666f\u7279\u5225\u6709\u7528\u3002<\/p>\n<pre><code>eval \"if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('set', KEYS[1], ARGV[2]) else return nil end\" 1 key expected_value new_value\n<\/code><\/pre>\n<h2 id=\"%e5%84%aa%e5%8c%96%e5%bb%ba%e8%ad%b0-uahIUXJQtT\">\u512a\u5316\u5efa\u8b70<\/h2>\n<p>\u5728\u5be6\u65bd\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\u6642\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\u512a\u5316\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u6e1b\u5c11WATCH\u7684\u4f7f\u7528\u7bc4\u570d\uff1a<\/strong>\u53ea\u76e3\u8996\u5fc5\u8981\u7684\u9375\uff0c\u4ee5\u964d\u4f4e\u6027\u80fd\u958b\u92b7\u3002<\/li>\n<li><strong>\u4f7f\u7528Lua\u8173\u672c\uff1a<\/strong>\u5c07\u591a\u500b\u64cd\u4f5c\u5408\u4f75\u5230\u4e00\u500bLua\u8173\u672c\u4e2d\uff0c\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u3002<\/li>\n<li><strong>\u5408\u7406\u8a2d\u8a08\u6578\u64da\u7d50\u69cb\uff1a<\/strong>\u6839\u64da\u696d\u52d9\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u7d50\u69cb\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u548c\u66f4\u65b0\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uahIUXJQtT\">\u7e3d\u7d50<\/h2>\n<p>Redis\u7684\u6bd4\u8f03\u66f4\u65b0\u6a21\u5f0f\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9748\u6d3b\u7684\u6578\u64da\u66f4\u65b0\u65b9\u5f0f\uff0c\u901a\u904e\u5408\u7406\u7684\u4f7f\u7528WATCH\u547d\u4ee4\u3001GET\u547d\u4ee4\u548cLua\u8173\u672c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u6578\u64da\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u548c\u6027\u80fd\u3002\u5728\u9078\u64c7\u5408\u9069\u7684\u512a\u5316\u7b56\u7565\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u548c\u7cfb\u7d71\u67b6\u69cb\u9032\u884c\u8abf\u6574\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u512a\u8cea\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u512a\u5316\u4e4b\u8def\uff0c\u6df1\u5165\u6bd4\u8f03\u4e0d\u540c\u66f4\u65b0\u6a21\u5f0f\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u52a9\u529b\u6578\u64da\u8655\u7406\u7684\u6700\u4f73\u5be6\u8e10\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-134517","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134517","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=134517"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134517\/revisions"}],"predecessor-version":[{"id":134518,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134517\/revisions\/134518"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=134517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=134517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=134517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}