{"id":128827,"date":"2024-10-26T17:03:21","date_gmt":"2024-10-26T09:03:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128827\/"},"modified":"2024-10-26T17:03:22","modified_gmt":"2024-10-26T09:03:22","slug":"redis%e5%af%a6%e7%8f%be%e5%bc%b7%e4%b8%80%e8%87%b4%e6%80%a7%e8%88%87%e5%b9%82%e7%ad%89%e6%80%a7%e8%a8%ad%e8%a8%88%ef%bc%88redis%e8%a7%a3%e6%b1%ba%e5%b9%82%e7%ad%89%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128827\/","title":{"rendered":"Redis\u5be6\u73fe\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u8a2d\u8a08\uff08redis\u89e3\u6c7a\u5e42\u7b49\uff09"},"content":{"rendered":"<h1 id=\"redis%e5%af%a6%e7%8f%be%e5%bc%b7%e4%b8%80%e8%87%b4%e6%80%a7%e8%88%87%e5%b9%82%e7%ad%89%e6%80%a7%e8%a8%ad%e8%a8%88%ef%bc%88redis%e8%a7%a3%e6%b1%ba%e5%b9%82%e7%ad%89%ef%bc%89-dnmZmZRHro\">Redis\u5be6\u73fe\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u8a2d\u8a08\uff08redis\u89e3\u6c7a\u5e42\u7b49\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u548c\u5e42\u7b49\u6027\u662f\u8a2d\u8a08\u9ad8\u6548\u80fd\u61c9\u7528\u7a0b\u5f0f\u7684\u95dc\u9375\u8981\u7d20\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u5be6\u73fe\u9019\u4e9b\u7279\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u5982\u4f55\u5be6\u73fe\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u8a2d\u8a08\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e5%bc%b7%e4%b8%80%e8%87%b4%e6%80%a7%e8%88%87%e5%b9%82%e7%ad%89%e6%80%a7%e7%9a%84%e5%ae%9a%e7%be%a9-dnmZmZRHro\">\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u7684\u5b9a\u7fa9<\/h2>\n<p>\u5728\u6df1\u5165Redis\u7684\u5be6\u73fe\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u660e\u78ba\u5f37\u4e00\u81f4\u6027\u548c\u5e42\u7b49\u6027\u7684\u5b9a\u7fa9\uff1a<\/p>\n<ul>\n<li><strong>\u5f37\u4e00\u81f4\u6027\uff1a<\/strong>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u5f37\u4e00\u81f4\u6027\u78ba\u4fdd\u6240\u6709\u7528\u6236\u5728\u4efb\u4f55\u6642\u9593\u9ede\u90fd\u80fd\u8b80\u53d6\u5230\u6700\u65b0\u7684\u6578\u64da\u3002\u9019\u610f\u5473\u8457\u4e00\u65e6\u6578\u64da\u88ab\u66f4\u65b0\uff0c\u6240\u6709\u5f8c\u7e8c\u7684\u8b80\u53d6\u64cd\u4f5c\u90fd\u5fc5\u9808\u8fd4\u56de\u66f4\u65b0\u5f8c\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u5e42\u7b49\u6027\uff1a<\/strong>\u5e42\u7b49\u6027\u662f\u6307\u5c0d\u540c\u4e00\u64cd\u4f5c\u7684\u591a\u6b21\u57f7\u884c\u7d50\u679c\u76f8\u540c\u3002\u9019\u5728\u8655\u7406\u91cd\u8a66\u6a5f\u5236\u6642\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u9632\u6b62\u56e0\u91cd\u8907\u8acb\u6c42\u800c\u5c0e\u81f4\u7684\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h2 id=\"redis%e4%b8%ad%e7%9a%84%e5%bc%b7%e4%b8%80%e8%87%b4%e6%80%a7-dnmZmZRHro\">Redis\u4e2d\u7684\u5f37\u4e00\u81f4\u6027<\/h2>\n<p>Redis\u672c\u8eab\u662f\u4e00\u500b\u55ae\u7dda\u7a0b\u7684\u6578\u64da\u5eab\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u67d0\u7a2e\u7a0b\u5ea6\u4e0a\u5929\u7136\u5177\u5099\u4e86\u5f37\u4e00\u81f4\u6027\u3002\u7576\u4e00\u500b\u64cd\u4f5c\u88ab\u57f7\u884c\u6642\uff0c\u8a72\u64cd\u4f5c\u6703\u7acb\u5373\u53cd\u6620\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u4e26\u4e14\u6240\u6709\u5f8c\u7e8c\u7684\u8b80\u53d6\u64cd\u4f5c\u90fd\u6703\u7372\u5f97\u6700\u65b0\u7684\u6578\u64da\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5728\u5206\u4f48\u5f0f\u74b0\u5883\u4e2d\uff0cRedis\u7684\u4e3b\u5f9e\u8907\u88fd\u6a5f\u5236\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u53ef\u4ee5\u4f7f\u7528Redis\u7684<strong>WATCH<\/strong>\u547d\u4ee4\u4f86\u5be6\u73fe\u6a02\u89c0\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u66f4\u65b0\u6578\u64da\u4e4b\u524d\u6aa2\u67e5\u6578\u64da\u7684\u72c0\u614b\uff0c\u78ba\u4fdd\u5728\u66f4\u65b0\u904e\u7a0b\u4e2d\u6578\u64da\u672a\u88ab\u5176\u4ed6\u64cd\u4f5c\u4fee\u6539\u3002<\/p>\n<pre><code>WATCH key\n\/\/ \u8b80\u53d6\u6578\u64da\nvalue = GET key\n\/\/ \u6839\u64da\u696d\u52d9\u908f\u8f2f\u4fee\u6539\u6578\u64da\nvalue = modify(value)\n\/\/ \u5617\u8a66\u66f4\u65b0\u6578\u64da\nMULTI\nSET key value\nEXEC<\/code><\/pre>\n<h2 id=\"redis%e4%b8%ad%e7%9a%84%e5%b9%82%e7%ad%89%e6%80%a7%e8%a8%ad%e8%a8%88-dnmZmZRHro\">Redis\u4e2d\u7684\u5e42\u7b49\u6027\u8a2d\u8a08<\/h2>\n<p>\u5728\u8a2d\u8a08\u5e42\u7b49\u6027\u6642\uff0cRedis\u63d0\u4f9b\u4e86\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u78ba\u4fdd\u64cd\u4f5c\u7684\u91cd\u8907\u57f7\u884c\u4e0d\u6703\u5f71\u97ff\u6700\u7d42\u7d50\u679c\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e5%94%af%e4%b8%80%e6%a8%99%e8%ad%98%e7%ac%a6-dnmZmZRHro\">\u4f7f\u7528\u552f\u4e00\u6a19\u8b58\u7b26<\/h3>\n<p>\u4e00\u7a2e\u5e38\u898b\u7684\u5e42\u7b49\u6027\u5be6\u73fe\u65b9\u5f0f\u662f\u4f7f\u7528\u552f\u4e00\u6a19\u8b58\u7b26\u4f86\u6a19\u8a18\u6bcf\u500b\u8acb\u6c42\u3002\u7576\u4e00\u500b\u8acb\u6c42\u5230\u9054\u6642\uff0c\u7cfb\u7d71\u9996\u5148\u6aa2\u67e5\u8a72\u6a19\u8b58\u7b26\u662f\u5426\u5df2\u7d93\u8655\u7406\u904e\u3002\u5982\u679c\u5df2\u7d93\u8655\u7406\u904e\uff0c\u5247\u76f4\u63a5\u8fd4\u56de\u7d50\u679c\uff1b\u5982\u679c\u672a\u8655\u7406\uff0c\u5247\u57f7\u884c\u76f8\u61c9\u7684\u64cd\u4f5c\u4e26\u8a18\u9304\u8a72\u6a19\u8b58\u7b26\u3002<\/p>\n<pre><code>if (GET request_id) {\n    return previous_result\n} else {\n    \/\/ \u57f7\u884c\u64cd\u4f5c\n    result = perform_operation()\n    SET request_id result\n    return result\n}<\/code><\/pre>\n<h3 id=\"%e4%bd%bf%e7%94%a8redis%e7%9a%84setnx%e5%91%bd%e4%bb%a4-dnmZmZRHro\">\u4f7f\u7528Redis\u7684SETNX\u547d\u4ee4<\/h3>\n<p>\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528Redis\u7684<strong>SETNX<\/strong>\u547d\u4ee4\u3002\u8a72\u547d\u4ee4\u5728\u9375\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u67d0\u500b\u64cd\u4f5c\u53ea\u6703\u57f7\u884c\u4e00\u6b21\u3002<\/p>\n<pre><code>SETNX lock_key value\nif (result == 1) {\n    \/\/ \u57f7\u884c\u64cd\u4f5c\n    perform_operation()\n    DEL lock_key\n}<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-dnmZmZRHro\">\u7d50\u8ad6<\/h2>\n<p>Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u5be6\u73fe\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u8a2d\u8a08\u3002\u901a\u904e\u4f7f\u7528WATCH\u547d\u4ee4\u3001\u552f\u4e00\u6a19\u8b58\u7b26\u548cSETNX\u547d\u4ee4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u64cd\u4f5c\u7684\u5e42\u7b49\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<p>\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\u7a0b\u5f0f\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u5982\u4f55\u5be6\u73fe\u5f37\u4e00\u81f4\u6027\u8207\u5e42\u7b49\u6027\u8a2d\u8a08\uff0c\u89e3\u6c7a\u5e42\u7b49\u6027\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u7684\u53ef\u9760\u6027\u8207\u6548\u7387\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-128827","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128827","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=128827"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128827\/revisions"}],"predecessor-version":[{"id":128828,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128827\/revisions\/128828"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}