{"id":126385,"date":"2024-10-26T04:17:18","date_gmt":"2024-10-25T20:17:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/126385\/"},"modified":"2024-10-26T04:17:18","modified_gmt":"2024-10-25T20:17:18","slug":"redis-%e7%a7%92%e6%ae%ba%e6%9f%a5%e8%a9%a2%ef%bc%8c%e6%9e%81%e9%80%9f%e4%ba%ab%e5%8f%97%e6%9f%a5%e8%a9%a2%e6%a8%82%e8%b6%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/126385\/","title":{"rendered":"Redis \u79d2\u6bba\u67e5\u8a62\uff0c\u6781\u901f\u4eab\u53d7\u67e5\u8a62\u6a02\u8da3"},"content":{"rendered":"<h1 id=\"redis-%e7%a7%92%e6%ae%ba%e6%9f%a5%e8%a9%a2%ef%bc%8c%e6%9e%81%e9%80%9f%e4%ba%ab%e5%8f%97%e6%9f%a5%e8%a9%a2%e6%a8%82%e8%b6%a3-dyWftajqjz\">Redis \u79d2\u6bba\u67e5\u8a62\uff0c\u6781\u901f\u4eab\u53d7\u67e5\u8a62\u6a02\u8da3<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u5feb\u901f\u67e5\u8a62\u548c\u9ad8\u6548\u6578\u64da\u8655\u7406\u662f\u4f01\u696d\u6210\u529f\u7684\u95dc\u9375\u3002Redis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6027\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5353\u8d8a\u7684\u67e5\u8a62\u901f\u5ea6\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\u800c\u53d7\u5230\u5ee3\u6cdb\u95dc\u6ce8\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u7684\u79d2\u6bba\u67e5\u8a62\u7279\u6027\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u5229\u7528\u9019\u4e00\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-redis%ef%bc%9f-dyWftajqjz\">\u4ec0\u9ebc\u662f Redis\uff1f<\/h2>\n<p>Redis\uff08Remote Dictionary Server\uff09\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\u7531\u65bc\u5176\u5728\u5167\u5b58\u4e2d\u64cd\u4f5c\u6578\u64da\uff0cRedis \u63d0\u4f9b\u4e86\u6975\u5feb\u7684\u8b80\u53d6\u548c\u5beb\u5165\u901f\u5ea6\uff0c\u9019\u4f7f\u5f97\u5b83\u6210\u70ba\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u7684\u7406\u60f3\u9078\u64c7\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9ad8\u983b\u67e5\u8a62\u7684\u5834\u666f\u4e2d\u3002<\/p>\n<h2 id=\"%e7%a7%92%e6%ae%ba%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%a6%82%e5%bf%b5-dyWftajqjz\">\u79d2\u6bba\u67e5\u8a62\u7684\u6982\u5ff5<\/h2>\n<p>\u79d2\u6bba\u67e5\u8a62\u901a\u5e38\u6307\u7684\u662f\u5728\u6975\u77ed\u7684\u6642\u9593\u5167\u5b8c\u6210\u5927\u91cf\u7684\u67e5\u8a62\u8acb\u6c42\u3002\u9019\u5728\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u7684\u4fc3\u92b7\u6d3b\u52d5\u4e2d\u5c24\u70ba\u5e38\u898b\uff0c\u7576\u7528\u6236\u5728\u77ed\u6642\u9593\u5167\u6436\u8cfc\u9650\u91cf\u5546\u54c1\u6642\uff0c\u7cfb\u7d71\u9700\u8981\u80fd\u5920\u5feb\u901f\u97ff\u61c9\u4ee5\u907f\u514d\u7528\u6236\u6d41\u5931\u3002Redis \u7684\u9ad8\u6548\u6027\u80fd\u4f7f\u5176\u6210\u70ba\u5be6\u73fe\u79d2\u6bba\u67e5\u8a62\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-dyWftajqjz\">Redis \u7684\u67e5\u8a62\u6027\u80fd<\/h2>\n<p>Redis \u7684\u67e5\u8a62\u6027\u80fd\u4e3b\u8981\u5f97\u76ca\u65bc\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u5167\u5b58\u5b58\u5132\uff1a<\/strong>\u6240\u6709\u6578\u64da\u90fd\u5b58\u5132\u5728\u5167\u5b58\u4e2d\uff0c\u9019\u4f7f\u5f97\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\u7684\u5ef6\u9072\u6642\u9593\u6975\u4f4e\u3002<\/li>\n<li><strong>\u6578\u64da\u7d50\u69cb\uff1a<\/strong>\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u7d50\u69cb\u4f86\u5b58\u5132\u6578\u64da\u3002<\/li>\n<li><strong>\u6301\u4e45\u5316\u9078\u9805\uff1a<\/strong>\u96d6\u7136 Redis \u662f\u4e00\u500b\u5167\u5b58\u6578\u64da\u5eab\uff0c\u4f46\u5b83\u4e5f\u63d0\u4f9b\u4e86\u591a\u7a2e\u6301\u4e45\u5316\u9078\u9805\uff0c\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u56e0\u70ba\u7cfb\u7d71\u5d29\u6f70\u800c\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e7%8f%be%e7%a7%92%e6%ae%ba%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%a4%ba%e4%be%8b-dyWftajqjz\">\u5be6\u73fe\u79d2\u6bba\u67e5\u8a62\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Redis \u5be6\u73fe\u79d2\u6bba\u67e5\u8a62\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>import redis\n\n# \u9023\u63a5\u5230 Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u7f6e\u5546\u54c1\u5eab\u5b58\nr.set('product:123:stock', 100)\n\n# \u79d2\u6bba\u67e5\u8a62\u51fd\u6578\ndef seckill(product_id):\n    stock_key = f'product:{product_id}:stock'\n    # \u4f7f\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u6e1b\u5c11\u5eab\u5b58\n    if r.decr(stock_key) &gt;= 0:\n        return \"\u8cfc\u8cb7\u6210\u529f\uff01\"\n    else:\n        return \"\u5eab\u5b58\u4e0d\u8db3\uff01\"\n\n# \u6a21\u64ec\u591a\u500b\u7528\u6236\u540c\u6642\u6436\u8cfc\nfor i in range(110):\n    print(seckill(123))\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 Redis \u7684 <code>decr<\/code> \u547d\u4ee4\u4f86\u539f\u5b50\u6027\u5730\u6e1b\u5c11\u5eab\u5b58\uff0c\u78ba\u4fdd\u5728\u9ad8\u4f75\u767c\u7684\u60c5\u6cc1\u4e0b\u4e0d\u6703\u51fa\u73fe\u5eab\u5b58\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-dyWftajqjz\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528 Redis \u5be6\u73fe\u79d2\u6bba\u67e5\u8a62\u6642\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\uff1a<\/strong>\u78ba\u4fdd\u6240\u6709\u7684\u5eab\u5b58\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u6027\u7684\uff0c\u4ee5\u907f\u514d\u7af6\u722d\u689d\u4ef6\u3002<\/li>\n<li><strong>\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff1a<\/strong>\u5c0d\u65bc\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\uff0c\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u4ee5\u91cb\u653e\u5167\u5b58\u3002<\/li>\n<li><strong>\u76e3\u63a7\u6027\u80fd\uff1a<\/strong>\u5b9a\u671f\u76e3\u63a7 Redis \u7684\u6027\u80fd\u6307\u6a19\uff0c\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u4e0b\u4ecd\u80fd\u7a69\u5b9a\u904b\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dyWftajqjz\">\u7e3d\u7d50<\/h2>\n<p>Redis \u7684\u9ad8\u6027\u80fd\u7279\u6027\u4f7f\u5176\u6210\u70ba\u5be6\u73fe\u79d2\u6bba\u67e5\u8a62\u7684\u7406\u60f3\u9078\u64c7\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5145\u5206\u767c\u63ee Redis \u7684\u6f5b\u529b\uff0c\u70ba\u7528\u6236\u63d0\u4f9b\u6d41\u66a2\u7684\u67e5\u8a62\u9ad4\u9a57\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u61c9\u5c0d\u9ad8\u4f75\u767c\u7684\u6311\u6230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u79d2\u6bba\u67e5\u8a62\uff0c\u8b93\u60a8\u9ad4\u9a57\u8d85\u5feb\u901f\u7684\u6578\u64da\u6aa2\u7d22\uff0c\u4eab\u53d7\u67e5\u8a62\u7684\u6a02\u8da3\uff0c\u63d0\u5347\u6548\u7387\uff0c\u512a\u5316\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-126385","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126385","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=126385"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126385\/revisions"}],"predecessor-version":[{"id":126386,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126385\/revisions\/126386"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=126385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=126385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=126385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}