{"id":180316,"date":"2024-11-09T09:12:19","date_gmt":"2024-11-09T01:12:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180316\/"},"modified":"2024-11-09T09:12:20","modified_gmt":"2024-11-09T01:12:20","slug":"%e8%a8%ad%e8%a8%88%e7%81%ab%e7%88%86%e7%a7%92%e6%ae%ba%e5%9f%ba%e6%96%bcredis%e7%9a%84%e9%ab%98%e4%b8%a6%e7%99%bc%e4%bb%a3%e7%a2%bc%e5%af%a6%e7%8f%be%ef%bc%88redis%e7%a7%92%e6%ae%ba%e9%ab%98%e4%b8%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180316\/","title":{"rendered":"\u8a2d\u8a08\u706b\u7206\u79d2\u6bba\u57fa\u65bcRedis\u7684\u9ad8\u4e26\u767c\u4ee3\u78bc\u5be6\u73fe\uff08redis\u79d2\u6bba\u9ad8\u4e26\u767c\u4ee3\u78bc\uff09"},"content":{"rendered":"<h1 id=\"%e8%a8%ad%e8%a8%88%e7%81%ab%e7%88%86%e7%a7%92%e6%ae%ba%e5%9f%ba%e6%96%bcredis%e7%9a%84%e9%ab%98%e4%b8%a6%e7%99%bc%e4%bb%a3%e7%a2%bc%e5%af%a6%e7%8f%be-iRgxITToRa\">\u8a2d\u8a08\u706b\u7206\u79d2\u6bba\u57fa\u65bcRedis\u7684\u9ad8\u4e26\u767c\u4ee3\u78bc\u5be6\u73fe<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u96fb\u5b50\u5546\u52d9\u74b0\u5883\u4e2d\uff0c\u79d2\u6bba\u6d3b\u52d5\u5df2\u6210\u70ba\u5438\u5f15\u9867\u5ba2\u7684\u91cd\u8981\u624b\u6bb5\u3002\u7136\u800c\uff0c\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u6fc0\u589e\uff0c\u5982\u4f55\u6709\u6548\u5730\u8655\u7406\u9ad8\u4e26\u767c\u8acb\u6c42\u6210\u70ba\u4e86\u6280\u8853\u5718\u968a\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5353\u8d8a\u7684\u6027\u80fd\u548c\u7c21\u55ae\u7684\u64cd\u4f5c\uff0c\u6210\u70ba\u4e86\u5be6\u73fe\u9ad8\u4e26\u767c\u79d2\u6bba\u7cfb\u7d71\u7684\u7406\u60f3\u9078\u64c7\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u8a2d\u8a08\u57fa\u65bcRedis\u7684\u9ad8\u4e26\u767c\u79d2\u6bba\u4ee3\u78bc\u5be6\u73fe\u3002<\/p>\n<h2 id=\"%e9%ab%98%e4%b8%a6%e7%99%bc%e7%a7%92%e6%ae%ba%e7%9a%84%e6%8c%91%e6%88%b0-iRgxITToRa\">\u9ad8\u4e26\u767c\u79d2\u6bba\u7684\u6311\u6230<\/h2>\n<p>\u5728\u79d2\u6bba\u6d3b\u52d5\u4e2d\uff0c\u901a\u5e38\u6703\u6709\u5927\u91cf\u7528\u6236\u5728\u77ed\u6642\u9593\u5167\u540c\u6642\u767c\u8d77\u8acb\u6c42\u3002\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u7cfb\u7d71\u9700\u8981\u80fd\u5920\u5feb\u901f\u97ff\u61c9\u4e26\u8655\u7406\u9019\u4e9b\u8acb\u6c42\uff0c\u5426\u5247\u5c07\u5c0e\u81f4\u7528\u6236\u9ad4\u9a57\u4e0b\u964d\uff0c\u751a\u81f3\u9020\u6210\u7cfb\u7d71\u5d29\u6f70\u3002\u4e3b\u8981\u6311\u6230\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8acb\u6c42\u7684\u77ac\u6642\u6fc0\u589e\uff0c\u5c0e\u81f4\u5f8c\u7aef\u670d\u52d9\u5668\u904e\u8f09\u3002<\/li>\n<li>\u6578\u64da\u4e00\u81f4\u6027\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u5eab\u5b58\u7ba1\u7406\u65b9\u9762\u3002<\/li>\n<li>\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u8cc7\u6e90\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u958b\u92b7\u3002<\/li>\n<\/ul>\n<h2 id=\"redis%e7%9a%84%e5%84%aa%e5%8b%a2-iRgxITToRa\">Redis\u7684\u512a\u52e2<\/h2>\n<p>Redis\u662f\u4e00\u7a2e\u57fa\u65bc\u9375\u503c\u5c0d\u7684\u6578\u64da\u5eab\uff0c\u5177\u6709\u4ee5\u4e0b\u5e7e\u500b\u512a\u52e2\uff0c\u4f7f\u5176\u6210\u70ba\u9ad8\u4e26\u767c\u79d2\u6bba\u7cfb\u7d71\u7684\u7406\u60f3\u9078\u64c7\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u6027\u80fd\uff1a<\/strong>Redis\u80fd\u5920\u6bcf\u79d2\u8655\u7406\u6578\u5341\u842c\u6b21\u8acb\u6c42\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u9ad8\u4e26\u767c\u5834\u666f\u4e2d\u8868\u73fe\u51fa\u8272\u3002<\/li>\n<li><strong>\u6578\u64da\u6301\u4e45\u5316\uff1a<\/strong>Redis\u652f\u6301\u591a\u7a2e\u6301\u4e45\u5316\u65b9\u5f0f\uff0c\u80fd\u5920\u5728\u7cfb\u7d71\u91cd\u555f\u5f8c\u6062\u5fa9\u6578\u64da\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>Redis\u7684API\u8a2d\u8a08\u7c21\u55ae\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5feb\u901f\u4e0a\u624b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9f%ba%e6%96%bcredis%e7%9a%84%e7%a7%92%e6%ae%ba%e5%af%a6%e7%8f%be-iRgxITToRa\">\u57fa\u65bcRedis\u7684\u79d2\u6bba\u5be6\u73fe<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u65bcRedis\u7684\u7c21\u55ae\u79d2\u6bba\u4ee3\u78bc\u5be6\u73fe\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nimport redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u5b9a\u79d2\u6bba\u5546\u54c1\u7684\u5eab\u5b58\nproduct_id = \"product_1\"\nr.set(product_id, 100)  # \u5047\u8a2d\u5eab\u5b58\u70ba100\n\ndef seckill(user_id):\n    # \u6aa2\u67e5\u5eab\u5b58\n    if int(r.get(product_id)) &gt; 0:\n        # \u958b\u59cb\u79d2\u6bba\n        r.decr(product_id)  # \u5eab\u5b58\u6e1b1\n        print(f\"\u7528\u6236 {user_id} \u6210\u529f\u6436\u8cfc\u5546\u54c1\uff01\")\n    else:\n        print(f\"\u7528\u6236 {user_id} \u62b1\u6b49\uff0c\u5546\u54c1\u5df2\u552e\u7f44\u3002\")\n\n# \u6a21\u64ec\u591a\u500b\u7528\u6236\u540c\u6642\u6436\u8cfc\nfor user in range(1, 201):\n    time.sleep(0.01)  # \u6a21\u64ec\u8acb\u6c42\u5ef6\u9072\n    seckill(user)\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528Redis\u7684`SET`\u548c`DECR`\u547d\u4ee4\u4f86\u7ba1\u7406\u5eab\u5b58\u3002\u7576\u7528\u6236\u767c\u8d77\u6436\u8cfc\u8acb\u6c42\u6642\uff0c\u7cfb\u7d71\u9996\u5148\u6aa2\u67e5\u5eab\u5b58\u662f\u5426\u5927\u65bc0\uff0c\u5982\u679c\u662f\uff0c\u5247\u6e1b\u5c11\u5eab\u5b58\u4e26\u8fd4\u56de\u6210\u529f\u6d88\u606f\uff1b\u5426\u5247\uff0c\u8fd4\u56de\u552e\u7f44\u6d88\u606f\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7%e8%99%95%e7%90%86-iRgxITToRa\">\u6578\u64da\u4e00\u81f4\u6027\u8655\u7406<\/h2>\n<p>\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528Redis\u7684\u4e8b\u52d9\u529f\u80fd\u6216Lua\u8173\u672c\u4f86\u539f\u5b50\u6027\u5730\u57f7\u884c\u591a\u500b\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c07\u5eab\u5b58\u6aa2\u67e5\u548c\u6e1b\u5c11\u5eab\u5b58\u7684\u64cd\u4f5c\u653e\u5728\u540c\u4e00\u500bLua\u8173\u672c\u4e2d\u57f7\u884c\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u6aa2\u67e5\u5eab\u5b58\u548c\u6e1b\u5c11\u5eab\u5b58\u4e4b\u9593\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\u3002<\/p>\n<pre><code>\nlocal stock = redis.call('get', KEYS[1])\nif tonumber(stock) &gt; 0 then\n    redis.call('decr', KEYS[1])\n    return 1\nelse\n    return 0\nend\n<\/code><\/pre>\n<p>\u9019\u6bb5Lua\u8173\u672c\u53ef\u4ee5\u78ba\u4fdd\u5728\u6aa2\u67e5\u5eab\u5b58\u548c\u6e1b\u5c11\u5eab\u5b58\u4e4b\u9593\u4e0d\u6703\u6709\u5176\u4ed6\u8acb\u6c42\u5e72\u64fe\uff0c\u5f9e\u800c\u4fdd\u8b49\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iRgxITToRa\">\u7e3d\u7d50<\/h2>\n<p>\u57fa\u65bcRedis\u7684\u9ad8\u4e26\u767c\u79d2\u6bba\u7cfb\u7d71\u8a2d\u8a08\u9700\u8981\u8003\u616e\u591a\u65b9\u9762\u7684\u56e0\u7d20\uff0c\u5305\u62ec\u6027\u80fd\u3001\u6578\u64da\u4e00\u81f4\u6027\u548c\u8cc7\u6e90\u7ba1\u7406\u3002\u901a\u904e\u5408\u7406\u5229\u7528Redis\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u61c9\u5c0d\u9ad8\u4e26\u767c\u8acb\u6c42\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8655\u7406\u4e26\u767c\u8acb\u6c42\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u67b6\u69cb\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\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u57fa\u65bcRedis\u7684\u9ad8\u4e26\u767c\u79d2\u6bba\u4ee3\u78bc\u5be6\u73fe\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\uff0c\u61c9\u5c0d\u706b\u7206\u79d2\u6bba\u6d3b\u52d5\u7684\u6311\u6230\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-180316","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180316","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=180316"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180316\/revisions"}],"predecessor-version":[{"id":180317,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180316\/revisions\/180317"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}