{"id":128383,"date":"2024-10-26T13:45:17","date_gmt":"2024-10-26T05:45:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128383\/"},"modified":"2024-10-26T13:45:17","modified_gmt":"2024-10-26T05:45:17","slug":"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e4%bf%a1%e8%99%9f%e9%87%8f%e5%ae%89%e5%85%a8%e5%8f%af%e9%9d%a0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128383\/","title":{"rendered":"Redis \u5be6\u73fe\u7684\u4fe1\u865f\u91cf\u5b89\u5168\u53ef\u9760"},"content":{"rendered":"<h1 id=\"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e4%bf%a1%e8%99%9f%e9%87%8f%e5%ae%89%e5%85%a8%e5%8f%af%e9%9d%a0-pSRSViAISg\">Redis \u5be6\u73fe\u7684\u4fe1\u865f\u91cf\u5b89\u5168\u53ef\u9760<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u4fe1\u865f\u91cf\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u540c\u6b65\u6a5f\u5236\uff0c\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u529f\u80fd\uff0c\u80fd\u5920\u6709\u6548\u5730\u5be6\u73fe\u4fe1\u865f\u91cf\u7684\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u5be6\u73fe\u5b89\u5168\u53ef\u9760\u7684\u4fe1\u865f\u91cf\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e4%bf%a1%e8%99%9f%e9%87%8f%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-pSRSViAISg\">\u4fe1\u865f\u91cf\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u4fe1\u865f\u91cf\u662f\u4e00\u7a2e\u8a08\u6578\u5668\uff0c\u7528\u65bc\u63a7\u5236\u5c0d\u67d0\u500b\u8cc7\u6e90\u7684\u8a2a\u554f\u6578\u91cf\u3002\u5b83\u53ef\u4ee5\u7528\u65bc\u9650\u5236\u540c\u6642\u8a2a\u554f\u67d0\u500b\u8cc7\u6e90\u7684\u7dda\u7a0b\u6578\u91cf\uff0c\u5f9e\u800c\u907f\u514d\u8cc7\u6e90\u7684\u904e\u5ea6\u4f7f\u7528\u6216\u7af6\u722d\u689d\u4ef6\u7684\u767c\u751f\u3002\u4fe1\u865f\u91cf\u901a\u5e38\u6709\u5169\u7a2e\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li><strong>\u7b49\u5f85\uff08P \u64cd\u4f5c\uff09<\/strong>\uff1a\u7576\u4fe1\u865f\u91cf\u7684\u503c\u5927\u65bc\u96f6\u6642\uff0c\u5c07\u5176\u6e1b\u4e00\uff0c\u5426\u5247\u9032\u5165\u7b49\u5f85\u72c0\u614b\u3002<\/li>\n<li><strong>\u91cb\u653e\uff08V \u64cd\u4f5c\uff09<\/strong>\uff1a\u5c07\u4fe1\u865f\u91cf\u7684\u503c\u52a0\u4e00\uff0c\u4e26\u559a\u9192\u7b49\u5f85\u7684\u7dda\u7a0b\uff08\u5982\u679c\u6709\u7684\u8a71\uff09\u3002<\/li>\n<\/ul>\n<h2 id=\"redis-%e4%b8%ad%e7%9a%84%e4%bf%a1%e8%99%9f%e9%87%8f%e5%af%a6%e7%8f%be-pSRSViAISg\">Redis \u4e2d\u7684\u4fe1\u865f\u91cf\u5be6\u73fe<\/h2>\n<p>Redis \u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u5217\u8868\u3001\u96c6\u5408\u7b49\uff0c\u9019\u4e9b\u90fd\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u4fe1\u865f\u91cf\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Redis \u5be6\u73fe\u4fe1\u865f\u91cf\u7684\u4e00\u7a2e\u5e38\u898b\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8-redis-%e9%8d%b5%e5%80%bc%e5%b0%8d%e5%af%a6%e7%8f%be%e4%bf%a1%e8%99%9f%e9%87%8f-pSRSViAISg\">\u4f7f\u7528 Redis \u9375\u503c\u5c0d\u5be6\u73fe\u4fe1\u865f\u91cf<\/h3>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u5b57\u7b26\u4e32\u985e\u578b\u4f86\u5b58\u5132\u4fe1\u865f\u91cf\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SETNX semaphore_key 1  # \u521d\u59cb\u5316\u4fe1\u865f\u91cf\n# P \u64cd\u4f5c\nDECR semaphore_key  # \u6e1b\u5c11\u4fe1\u865f\u91cf\n# V \u64cd\u4f5c\nINCR semaphore_key  # \u589e\u52a0\u4fe1\u865f\u91cf\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>SETNX<\/code> \u547d\u4ee4\u4f86\u521d\u59cb\u5316\u4fe1\u865f\u91cf\uff0c\u7136\u5f8c\u4f7f\u7528 <code>DECR<\/code> \u548c <code>INCR<\/code> \u4f86\u5be6\u73fe P \u548c V \u64cd\u4f5c\u3002<\/p>\n<h3 id=\"%e7%a2%ba%e4%bf%9d%e4%bf%a1%e8%99%9f%e9%87%8f%e7%9a%84%e5%ae%89%e5%85%a8%e6%80%a7-pSRSViAISg\">\u78ba\u4fdd\u4fe1\u865f\u91cf\u7684\u5b89\u5168\u6027<\/h3>\n<p>\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\uff0c\u78ba\u4fdd\u4fe1\u865f\u91cf\u7684\u5b89\u5168\u6027\u81f3\u95dc\u91cd\u8981\u3002Redis \u7684\u539f\u5b50\u64cd\u4f5c\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u907f\u514d\u7af6\u722d\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 <code>WATCH<\/code> \u547d\u4ee4\u4f86\u76e3\u8996\u4fe1\u865f\u91cf\u7684\u9375\uff0c\u78ba\u4fdd\u5728\u64cd\u4f5c\u671f\u9593\u4e0d\u6703\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u4fee\u6539\u3002<\/li>\n<li>\u4f7f\u7528 <code>MULTI<\/code> \u548c <code>EXEC<\/code> \u547d\u4ee4\u4f86\u5be6\u73fe\u4e8b\u52d9\uff0c\u78ba\u4fdd\u4e00\u7d44\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u3002<\/li>\n<\/ul>\n<h4 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-pSRSViAISg\">\u793a\u4f8b\u4ee3\u78bc<\/h4>\n<pre><code>WATCH semaphore_key\nif (GET semaphore_key &gt; 0) {\n    MULTI\n    DECR semaphore_key\n    EXEC\n} else {\n    # \u7b49\u5f85\u6216\u8fd4\u56de\u932f\u8aa4\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u4f7f\u7528 <code>WATCH<\/code> \u76e3\u8996\u4fe1\u865f\u91cf\u7684\u9375\uff0c\u7136\u5f8c\u6aa2\u67e5\u5176\u503c\u3002\u5982\u679c\u4fe1\u865f\u91cf\u5927\u65bc\u96f6\uff0c\u6211\u5011\u4f7f\u7528 <code>MULTI<\/code> \u548c <code>EXEC<\/code> \u4f86\u78ba\u4fdd\u6e1b\u5c11\u4fe1\u865f\u91cf\u7684\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-pSRSViAISg\">\u7d50\u8ad6<\/h2>\n<p>Redis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u4e14\u5b89\u5168\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u4fe1\u865f\u91cf\uff0c\u9069\u7528\u65bc\u5404\u7a2e\u5206\u4f48\u5f0f\u7cfb\u7d71\u3002\u901a\u904e\u5229\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u548c\u4e8b\u52d9\u6a5f\u5236\uff0c\u6211\u5011\u53ef\u4ee5\u78ba\u4fdd\u4fe1\u865f\u91cf\u7684\u5b89\u5168\u6027\u548c\u53ef\u9760\u6027\u3002\u9019\u4f7f\u5f97 Redis \u6210\u70ba\u5be6\u73fe\u4fe1\u865f\u91cf\u7684\u7406\u60f3\u9078\u64c7\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9ad8\u6027\u80fd\u548c\u9ad8\u53ef\u7528\u6027\u7684\u61c9\u7528\u5834\u666f\u4e2d\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u5be6\u73fe\u7684\u4fe1\u865f\u91cf\u63d0\u4f9b\u9ad8\u6548\u3001\u5b89\u5168\u7684\u8cc7\u6e90\u7ba1\u7406\uff0c\u78ba\u4fdd\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u53ef\u9760\u6027\u8207\u4e00\u81f4\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-128383","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128383","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=128383"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128383\/revisions"}],"predecessor-version":[{"id":128384,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128383\/revisions\/128384"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}