{"id":127885,"date":"2024-10-26T10:01:29","date_gmt":"2024-10-26T02:01:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/127885\/"},"modified":"2024-10-26T10:01:29","modified_gmt":"2024-10-26T02:01:29","slug":"redis-%e7%86%94%e6%96%b7%e4%bd%95%e7%82%ba%e5%ae%89%e5%85%a8%e4%bf%9d%e8%ad%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/127885\/","title":{"rendered":"Redis \u7194\u65b7\u4f55\u70ba\u5b89\u5168\u4fdd\u8b77"},"content":{"rendered":"<h1 id=\"redis-%e7%86%94%e6%96%b7%e4%bd%95%e7%82%ba%e5%ae%89%e5%85%a8%e4%bf%9d%e8%ad%b7-wByrRcPyfm\">Redis \u7194\u65b7\u4f55\u70ba\u5b89\u5168\u4fdd\u8b77<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u74b0\u5883\u4e2d\uff0c\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u7528\u6236\u9700\u6c42\u7684\u589e\u52a0\uff0c\u7cfb\u7d71\u7684\u8ca0\u8f09\u4e5f\u96a8\u4e4b\u4e0a\u5347\uff0c\u9019\u4f7f\u5f97\u61c9\u7528\u7a0b\u5e8f\u9762\u81e8\u8457\u5404\u7a2e\u6311\u6230\u3002\u70ba\u4e86\u61c9\u5c0d\u9019\u4e9b\u6311\u6230\uff0c\u8a31\u591a\u958b\u767c\u8005\u9078\u64c7\u4f7f\u7528 Redis \u4f5c\u70ba\u5176\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u3002Redis \u4e0d\u50c5\u662f\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u9084\u63d0\u4f9b\u4e86\u7194\u65b7\u6a5f\u5236\u4f86\u4fdd\u8b77\u7cfb\u7d71\u7684\u5b89\u5168\u6027\u548c\u7a69\u5b9a\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u7194\u65b7\u7684\u6982\u5ff5\u53ca\u5176\u5728\u5b89\u5168\u4fdd\u8b77\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%86%94%e6%96%b7%ef%bc%9f-wByrRcPyfm\">\u4ec0\u9ebc\u662f\u7194\u65b7\uff1f<\/h2>\n<p>\u7194\u65b7\u662f\u4e00\u7a2e\u8a2d\u8a08\u6a21\u5f0f\uff0c\u4e3b\u8981\u7528\u65bc\u9632\u6b62\u7cfb\u7d71\u5728\u9762\u5c0d\u9ad8\u8ca0\u8f09\u6216\u6545\u969c\u6642\u7684\u5d29\u6f70\u3002\u7576\u4e00\u500b\u670d\u52d9\u7684\u8acb\u6c42\u5931\u6557\u7387\u8d85\u904e\u9810\u8a2d\u7684\u95be\u503c\u6642\uff0c\u7194\u65b7\u5668\u6703\u81ea\u52d5\u5207\u65b7\u5c0d\u8a72\u670d\u52d9\u7684\u8acb\u6c42\uff0c\u5f9e\u800c\u907f\u514d\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d6a\u8cbb\u548c\u9032\u4e00\u6b65\u7684\u6545\u969c\u64f4\u5927\u3002\u9019\u4e00\u6a5f\u5236\u53ef\u4ee5\u6709\u6548\u5730\u4fdd\u8b77\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u4e26\u70ba\u6545\u969c\u6062\u5fa9\u63d0\u4f9b\u6642\u9593\u3002<\/p>\n<h2 id=\"redis-%e4%b8%ad%e7%9a%84%e7%86%94%e6%96%b7%e6%a9%9f%e5%88%b6-wByrRcPyfm\">Redis \u4e2d\u7684\u7194\u65b7\u6a5f\u5236<\/h2>\n<p>\u5728 Redis \u4e2d\uff0c\u7194\u65b7\u6a5f\u5236\u901a\u5e38\u8207\u5176\u9ad8\u53ef\u7528\u6027\u548c\u5206\u4f48\u5f0f\u67b6\u69cb\u76f8\u7d50\u5408\u3002\u7576 Redis \u4f5c\u70ba\u7de9\u5b58\u5c64\u6642\uff0c\u7194\u65b7\u53ef\u4ee5\u9632\u6b62\u5f8c\u7aef\u6578\u64da\u5eab\u7684\u904e\u8f09\u3002\u4ee5\u4e0b\u662f Redis \u7194\u65b7\u7684\u4e00\u4e9b\u95dc\u9375\u7279\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u81ea\u52d5\u6062\u5fa9\uff1a<\/strong>\u7576\u7194\u65b7\u5668\u88ab\u89f8\u767c\u5f8c\uff0c\u7cfb\u7d71\u6703\u5728\u4e00\u6bb5\u6642\u9593\u5f8c\u81ea\u52d5\u6062\u5fa9\u5c0d\u8a72\u670d\u52d9\u7684\u8acb\u6c42\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4eba\u5de5\u5e72\u9810\u7684\u9700\u6c42\u3002<\/li>\n<li><strong>\u6545\u969c\u8f49\u79fb\uff1a<\/strong>\u5728\u7194\u65b7\u671f\u9593\uff0c\u7cfb\u7d71\u53ef\u4ee5\u5c07\u8acb\u6c42\u8f49\u767c\u5230\u5176\u4ed6\u53ef\u7528\u7684\u670d\u52d9\u5be6\u4f8b\uff0c\u5f9e\u800c\u4fdd\u6301\u7cfb\u7d71\u7684\u53ef\u7528\u6027\u3002<\/li>\n<li><strong>\u76e3\u63a7\u548c\u544a\u8b66\uff1a<\/strong>\u7194\u65b7\u6a5f\u5236\u901a\u5e38\u8207\u76e3\u63a7\u7cfb\u7d71\u96c6\u6210\uff0c\u7576\u7194\u65b7\u5668\u88ab\u89f8\u767c\u6642\uff0c\u7cfb\u7d71\u6703\u767c\u9001\u544a\u8b66\u901a\u77e5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u53ca\u6642\u8655\u7406\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be-redis-%e7%86%94%e6%96%b7-wByrRcPyfm\">\u5982\u4f55\u5be6\u73fe Redis \u7194\u65b7<\/h2>\n<p>\u5be6\u73fe Redis \u7194\u65b7\u6a5f\u5236\u901a\u5e38\u9700\u8981\u7d50\u5408\u61c9\u7528\u7a0b\u5e8f\u7684\u908f\u8f2f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 Node.js \u61c9\u7528\u4e2d\u4f7f\u7528\u7194\u65b7\u5668\uff1a<\/p>\n<pre><code>\nconst Redis = require('ioredis');\nconst CircuitBreaker = require('opossum');\n\nconst redis = new Redis();\n\nconst options = {\n    timeout: 1000, \/\/ \u8acb\u6c42\u8d85\u6642\u6642\u9593\n    errorThresholdPercentage: 50, \/\/ \u932f\u8aa4\u95be\u503c\u767e\u5206\u6bd4\n    resetTimeout: 30000 \/\/ \u91cd\u7f6e\u8d85\u6642\u6642\u9593\n};\n\nconst breaker = new CircuitBreaker(async () =&gt; {\n    return await redis.get('key');\n}, options);\n\nbreaker.fallback(() =&gt; '\u670d\u52d9\u66ab\u6642\u4e0d\u53ef\u7528');\n\n(async () =&gt; {\n    try {\n        const result = await breaker.fire();\n        console.log(result);\n    } catch (error) {\n        console.error(error);\n    }\n})();\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>opossum<\/code> \u5eab\u4f86\u5be6\u73fe\u7194\u65b7\u5668\uff0c\u4e26\u8a2d\u7f6e\u4e86\u76f8\u95dc\u7684\u53c3\u6578\u3002\u7576 Redis \u8acb\u6c42\u5931\u6557\u7387\u8d85\u904e 50% \u6642\uff0c\u7194\u65b7\u5668\u5c07\u6703\u555f\u52d5\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u5099\u7528\u97ff\u61c9\u3002<\/p>\n<h2 id=\"%e7%86%94%e6%96%b7%e7%9a%84%e5%ae%89%e5%85%a8%e4%bf%9d%e8%ad%b7%e4%bd%9c%e7%94%a8-wByrRcPyfm\">\u7194\u65b7\u7684\u5b89\u5168\u4fdd\u8b77\u4f5c\u7528<\/h2>\n<p>\u7194\u65b7\u6a5f\u5236\u5728\u5b89\u5168\u4fdd\u8b77\u65b9\u9762\u7684\u4f5c\u7528\u4e0d\u5bb9\u5ffd\u8996\u3002\u5b83\u80fd\u5920\u6709\u6548\u5730\u9632\u6b62\u7cfb\u7d71\u56e0\u70ba\u904e\u8f09\u800c\u5d29\u6f70\uff0c\u5f9e\u800c\u4fdd\u8b77\u7528\u6236\u6578\u64da\u7684\u5b89\u5168\u3002\u6b64\u5916\uff0c\u7194\u65b7\u9084\u80fd\u5920\u6e1b\u5c11\u670d\u52d9\u5668\u7684\u8cc7\u6e90\u6d88\u8017\uff0c\u964d\u4f4e\u904b\u71df\u6210\u672c\u3002\u7576\u7cfb\u7d71\u9762\u81e8\u653b\u64ca\u6216\u7570\u5e38\u6d41\u91cf\u6642\uff0c\u7194\u65b7\u6a5f\u5236\u80fd\u5920\u8fc5\u901f\u97ff\u61c9\uff0c\u4fdd\u8b77\u7cfb\u7d71\u7684\u6838\u5fc3\u529f\u80fd\u4e0d\u53d7\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-wByrRcPyfm\">\u7d50\u8ad6<\/h2>\n<p>Redis \u7684\u7194\u65b7\u6a5f\u5236\u662f\u4e00\u7a2e\u6709\u6548\u7684\u5b89\u5168\u4fdd\u8b77\u624b\u6bb5\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u61c9\u5c0d\u9ad8\u8ca0\u8f09\u548c\u6545\u969c\u60c5\u6cc1\u3002\u901a\u904e\u5408\u7406\u7684\u914d\u7f6e\u548c\u5be6\u73fe\uff0c\u7194\u65b7\u5668\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u7528\u6027\u3002\u5c0d\u65bc\u5e0c\u671b\u5728\u9999\u6e2f\u5c0b\u627e\u9ad8\u6548\u80fd\u89e3\u6c7a\u65b9\u6848\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u5c07\u662f\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u7684\u91cd\u8981\u4e00\u6b65\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u7194\u65b7\u662f\u4e00\u7a2e\u5b89\u5168\u4fdd\u8b77\u6a5f\u5236\uff0c\u901a\u904e\u81ea\u52d5\u66ab\u505c\u6545\u969c\u670d\u52d9\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u53ef\u7528\u6027\uff0c\u9632\u6b62\u8cc7\u6e90\u904e\u8f09\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-127885","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/127885","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=127885"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/127885\/revisions"}],"predecessor-version":[{"id":127886,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/127885\/revisions\/127886"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=127885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=127885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=127885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}