{"id":49077,"date":"2025-07-30T15:21:41","date_gmt":"2025-07-30T07:21:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/49077.html"},"modified":"2025-07-30T15:21:41","modified_gmt":"2025-07-30T07:21:41","slug":"horain%e4%ba%91-redis%e7%bc%93%e5%ad%98%e4%b8%89%e5%89%91%e5%ae%a2%ef%bc%9a%e7%a9%bf%e9%80%8f%e3%80%81%e5%87%bb%e7%a9%bf%e3%80%81%e9%9b%aa%e5%b4%a9%e7%bb%88%e6%9e%81%e9%98%b2%e5%be%a1%e6%8c%87","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/49077.html","title":{"rendered":"HoRain\u4e91--Redis\u7f13\u5b58\u4e09\u5251\u5ba2\uff1a\u7a7f\u900f\u3001\u51fb\u7a7f\u3001\u96ea\u5d29\u7ec8\u6781\u9632\u5fa1\u6307\u5357"},"content":{"rendered":"<\/p>\n<p style=\"text-align:center\">\u00a0\u00a0<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"70\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730072137-6889c801c0f0e.jpg\" width=\"70\" \/><\/p>\n<p style=\"text-align:center\">&#x1f3ac; HoRain \u4e91\u5c0f\u52a9\u624b&#xff1a;\u4e2a\u4eba\u4e3b\u9875<\/p>\n<p style=\"text-align:center\">\u26fa\ufe0f\u751f\u6d3b\u7684\u7406\u60f3&#xff0c;\u5c31\u662f\u4e3a\u4e86\u7406\u60f3\u7684\u751f\u6d3b!<\/p>\n<hr \/>\n<h4 id=\"%E2%9B%B3%EF%B8%8F%20%E6%8E%A8%E8%8D%90\">\u26f3\ufe0f \u63a8\u8350<\/h4>\n<p>\u524d\u4e9b\u5929\u53d1\u73b0\u4e86\u4e00\u4e2a\u8d85\u68d2\u7684\u670d\u52a1\u5668\u8d2d\u4e70\u7f51\u7ad9&#xff0c;\u6027\u4ef7\u6bd4\u8d85\u9ad8&#xff0c;\u5927\u5185\u5b58\u8d85\u5212\u7b97&#xff01;\u5fcd\u4e0d\u4f4f\u5206\u4eab\u4e00\u4e0b\u7ed9\u5927\u5bb6\u3002\u70b9\u51fb\u8df3\u8f6c\u5230\u7f51\u7ad9\u3002<\/p>\n<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"%E2%9B%B3%EF%B8%8F%20%E6%8E%A8%E8%8D%90-toc\" style=\"margin-left:80px\">\u26f3\ufe0f \u63a8\u8350<\/p>\n<p id=\"%F0%9F%9B%A1%EF%B8%8F%20%E2%80%8B%E2%80%8B%E4%B8%80%E3%80%81%E7%BC%93%E5%AD%98%E7%A9%BF%E9%80%8F%EF%BC%88Cache%20Penetration%EF%BC%89%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:80px\">&#x1f6e1;\ufe0f \u200b\u200b\u4e00\u3001\u7f13\u5b58\u7a7f\u900f&#xff08;Cache Penetration&#xff09;\u200b\u200b<\/p>\n<p id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:120px\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/p>\n<p id=\"%F0%9F%94%A5%20%E2%80%8B%E2%80%8B%E4%BA%8C%E3%80%81%E7%BC%93%E5%AD%98%E5%87%BB%E7%A9%BF%EF%BC%88Cache%20Breakdown%EF%BC%89%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:80px\">&#x1f525; \u200b\u200b\u4e8c\u3001\u7f13\u5b58\u51fb\u7a7f&#xff08;Cache Breakdown&#xff09;\u200b\u200b<\/p>\n<p id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:120px\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/p>\n<p id=\"%E2%9D%84%EF%B8%8F%20%E2%80%8B%E2%80%8B%E4%B8%89%E3%80%81%E7%BC%93%E5%AD%98%E9%9B%AA%E5%B4%A9%EF%BC%88Cache%20Avalanche%EF%BC%89%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:80px\">\u2744\ufe0f \u200b\u200b\u4e09\u3001\u7f13\u5b58\u96ea\u5d29&#xff08;Cache Avalanche&#xff09;\u200b\u200b<\/p>\n<p id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:120px\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/p>\n<p id=\"%F0%9F%92%8E%20%E2%80%8B%E2%80%8B%E5%9B%9B%E3%80%81%E6%96%B9%E6%A1%88%E9%80%89%E5%9E%8B%E5%AF%B9%E6%AF%94%E8%A1%A8%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:80px\">&#x1f48e; \u200b\u200b\u56db\u3001\u65b9\u6848\u9009\u578b\u5bf9\u6bd4\u8868\u200b\u200b<\/p>\n<p id=\"%E2%9A%99%EF%B8%8F%20%E2%80%8B%E2%80%8B%E4%BA%94%E3%80%81%E8%BF%90%E7%BB%B4%E4%B8%8E%E7%9B%91%E6%8E%A7%E2%80%8B%E2%80%8B-toc\" style=\"margin-left:80px\">\u2699\ufe0f \u200b\u200b\u4e94\u3001\u8fd0\u7ef4\u4e0e\u76d1\u63a7\u200b\u200b<\/p>\n<hr id=\"hr-toc\" \/>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"540\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730072139-6889c80310760.png\" width=\"960\" \/><\/p>\n<p>Redis \u7f13\u5b58\u7a7f\u900f\u3001\u51fb\u7a7f\u548c\u96ea\u5d29\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u9ad8\u9891\u95ee\u9898&#xff0c;\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u538b\u529b\u5267\u589e\u751a\u81f3\u670d\u52a1\u5d29\u6e83\u3002\u4ee5\u4e0b\u662f\u9488\u5bf9\u4e09\u7c7b\u95ee\u9898\u7684\u5b8c\u6574\u89e3\u51b3\u65b9\u6848\u53ca\u5b9e\u8df5\u7b56\u7565&#xff1a;<\/p>\n<hr \/>\n<h4 id=\"%F0%9F%9B%A1%EF%B8%8F%20%E2%80%8B%E2%80%8B%E4%B8%80%E3%80%81%E7%BC%93%E5%AD%98%E7%A9%BF%E9%80%8F%EF%BC%88Cache%20Penetration%EF%BC%89%E2%80%8B%E2%80%8B\">&#x1f6e1;\ufe0f \u200b\u200b\u4e00\u3001\u7f13\u5b58\u7a7f\u900f&#xff08;Cache Penetration&#xff09;\u200b\u200b<\/h4>\n<p>\u200b\u200b\u95ee\u9898\u672c\u8d28\u200b\u200b&#xff1a;\u8bf7\u6c42\u8bbf\u95ee\u200b\u200b\u4e0d\u5b58\u5728\u7684\u6570\u636e\u200b\u200b&#xff08;\u7f13\u5b58\u548c\u6570\u636e\u5e93\u5747\u65e0&#xff09;&#xff0c;\u5bfc\u81f4\u6076\u610f\u6d41\u91cf\u76f4\u63a5\u51b2\u51fb\u6570\u636e\u5e93\u3002<\/p>\n<h5 id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/h5>\n<li>\n<p>\u200b\u200b\u5e03\u9686\u8fc7\u6ee4\u5668&#xff08;Bloom Filter&#xff09;\u200b\u200b<\/p>\n<ul>\n<li>\u200b\u200b\u539f\u7406\u200b\u200b&#xff1a;\u9884\u52a0\u8f7d\u6240\u6709\u5408\u6cd5 Key \u5230\u5e03\u9686\u8fc7\u6ee4\u5668&#xff08;\u57fa\u4e8e\u591a\u4e2a\u54c8\u5e0c\u51fd\u6570\u7684\u4f4d\u6570\u7ec4&#xff09;&#xff0c;\u62e6\u622a\u975e\u6cd5\u8bf7\u6c42\u3002<\/li>\n<li>\u200b\u200b\u5b9e\u8df5\u200b\u200b&#xff1a;\n<ul>\n<li>\u8bef\u5224\u7387\u8bbe\u7f6e&#xff1a;50\u4e07\u6570\u636e\u91cf\u4e0b\u8bef\u5224\u73871%\u4ec5\u9700\u7ea658KB\u5185\u5b58\u3002<\/li>\n<li>\u542f\u52a8\u65f6\u901a\u8fc7 &#064;PostConstruct \u521d\u59cb\u5316\u8fc7\u6ee4\u5668\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u200b\u200b\u4ee3\u7801\u793a\u4f8b\u200b\u200b&#xff1a; if (!bloomFilter.mightContain(key)) return null; \/\/ \u76f4\u63a5\u62e6\u622a\u975e\u6cd5\u8bf7\u6c42 <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u7f13\u5b58\u7a7a\u5bf9\u8c61&#xff08;Null Caching&#xff09;\u200b\u200b<\/p>\n<ul>\n<li>\u200b\u200b\u539f\u7406\u200b\u200b&#xff1a;\u5c06\u67e5\u8be2\u4e3a\u7a7a\u7684 Key \u7f13\u5b58\u4e3a\u7279\u6b8a\u503c&#xff08;\u5982 &#034;NULL&#034;&#xff09;&#xff0c;\u5e76\u8bbe\u7f6e\u77edTTL&#xff08;\u59822~5\u5206\u949f&#xff09;\u3002<\/li>\n<li>\u200b\u200b\u98ce\u9669\u200b\u200b&#xff1a;\u77ed\u671f\u6570\u636e\u4e0d\u4e00\u81f4&#xff08;\u5982\u65b0\u6570\u636e\u63d2\u5165\u540e\u4ecd\u8fd4\u56de\u7a7a\u503c&#xff09;\u3002<\/li>\n<li>\u200b\u200b\u4ee3\u7801\u4f18\u5316\u200b\u200b&#xff1a; if (dbData &#061;&#061; null) {<br \/>\n    redis.set(key, &#034;NULL&#034;, 5, TimeUnit.MINUTES); \/\/ \u7a7a\u503c\u7f13\u5b58<br \/>\n} <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u8bf7\u6c42\u62e6\u622a\u200b\u200b<\/p>\n<ul>\n<li>\u5165\u53e3\u5c42\u6821\u9a8c\u53c2\u6570\u683c\u5f0f&#xff08;\u5982ID\u5fc5\u987b&gt;0&#xff09;\u3002<\/li>\n<li>\u9ad8\u9891\u65e0\u6548\u8bf7\u6c42\u89e6\u53d1\u9650\u6d41\u6216\u5c01\u7981 IP\u3002<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4 id=\"%F0%9F%94%A5%20%E2%80%8B%E2%80%8B%E4%BA%8C%E3%80%81%E7%BC%93%E5%AD%98%E5%87%BB%E7%A9%BF%EF%BC%88Cache%20Breakdown%EF%BC%89%E2%80%8B%E2%80%8B\">&#x1f525; \u200b\u200b\u4e8c\u3001\u7f13\u5b58\u51fb\u7a7f&#xff08;Cache Breakdown&#xff09;\u200b\u200b<\/h4>\n<p>\u200b\u200b\u95ee\u9898\u672c\u8d28\u200b\u200b&#xff1a;\u200b\u200b\u70ed\u70b9 Key \u7a81\u7136\u5931\u6548\u200b\u200b&#xff0c;\u77ac\u65f6\u9ad8\u5e76\u53d1\u8bf7\u6c42\u538b\u57ae\u6570\u636e\u5e93\u3002<\/p>\n<h5 id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/h5>\n<li>\n<p>\u200b\u200b\u4e92\u65a5\u9501&#xff08;Mutex Lock&#xff09;\u200b\u200b<\/p>\n<ul>\n<li>\u200b\u200b\u539f\u7406\u200b\u200b&#xff1a;\u7f13\u5b58\u5931\u6548\u65f6&#xff0c;\u901a\u8fc7\u9501&#xff08;\u672c\u5730\u9501\u6216\u5206\u5e03\u5f0f\u9501&#xff09;\u786e\u4fdd\u4ec5\u4e00\u4e2a\u7ebf\u7a0b\u67e5\u8be2\u6570\u636e\u5e93\u3002<\/li>\n<li>\u200b\u200b\u5b9e\u8df5\u200b\u200b&#xff1a;\n<ul>\n<li>\u200b\u200b\u672c\u5730\u9501\u200b\u200b&#xff1a;synchronized(key.intern()) \u7ec6\u5316\u9501\u7c92\u5ea6\u3002<\/li>\n<li>\u200b\u200b\u5206\u5e03\u5f0f\u9501\u200b\u200b&#xff1a;Redis \u7684 SETNX \u547d\u4ee4\u5b9e\u73b0&#xff08;\u9700\u8bbe\u7f6e\u9501\u8d85\u65f6&#xff0c;\u907f\u514d\u6b7b\u9501&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u200b\u200b\u4ee3\u7801\u793a\u4f8b\u200b\u200b&#xff1a; if (redis.setnx(lockKey, &#034;1&#034;, 10, SECONDS)) { \/\/ \u83b7\u53d6\u9501<br \/>\n    data &#061; db.query(key);<br \/>\n    redis.set(key, data);<br \/>\n    redis.del(lockKey);<br \/>\n} else {<br \/>\n    Thread.sleep(50); \/\/ \u7b49\u5f85\u540e\u91cd\u8bd5<br \/>\n} <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u903b\u8f91\u8fc7\u671f &#043; \u5f02\u6b65\u5237\u65b0\u200b\u200b<\/p>\n<ul>\n<li>\u200b\u200b\u539f\u7406\u200b\u200b&#xff1a;\u7f13\u5b58\u6c38\u4e0d\u8fc7\u671f&#xff0c;Value \u4e2d\u5b58\u50a8\u903b\u8f91\u8fc7\u671f\u65f6\u95f4&#xff0c;\u540e\u53f0\u7ebf\u7a0b\u5f02\u6b65\u66f4\u65b0\u6570\u636e\u3002<\/li>\n<li>\u200b\u200b\u4f18\u52bf\u200b\u200b&#xff1a;\u7528\u6237\u65e0\u611f\u77e5&#xff0c;\u907f\u514d\u51fb\u7a7f\u98ce\u9669\u3002<\/li>\n<li>\u200b\u200b\u4ee3\u7801\u793a\u4f8b\u200b\u200b&#xff1a; class CacheData {<br \/>\n    Object data;<br \/>\n    long expireAt; \/\/ \u903b\u8f91\u8fc7\u671f\u65f6\u95f4\u6233<br \/>\n} <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u70ed\u70b9\u6570\u636e\u6c38\u4e0d\u8fc7\u671f\u200b\u200b<\/p>\n<ul>\n<li>\u5bf9\u6781\u9ad8\u9891 Key&#xff08;\u5982\u9996\u9875\u5546\u54c1&#xff09;\u4e0d\u8bbe TTL&#xff0c;\u901a\u8fc7\u5b9a\u65f6\u4efb\u52a1\u5f02\u6b65\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4 id=\"%E2%9D%84%EF%B8%8F%20%E2%80%8B%E2%80%8B%E4%B8%89%E3%80%81%E7%BC%93%E5%AD%98%E9%9B%AA%E5%B4%A9%EF%BC%88Cache%20Avalanche%EF%BC%89%E2%80%8B%E2%80%8B\">\u2744\ufe0f \u200b\u200b\u4e09\u3001\u7f13\u5b58\u96ea\u5d29&#xff08;Cache Avalanche&#xff09;\u200b\u200b<\/h4>\n<p>\u200b\u200b\u95ee\u9898\u672c\u8d28\u200b\u200b&#xff1a;\u200b\u200b\u5927\u91cf Key \u540c\u65f6\u5931\u6548\u200b\u200b \u6216 \u200b\u200bRedis \u96c6\u7fa4\u5b95\u673a\u200b\u200b&#xff0c;\u8bf7\u6c42\u6d2a\u5cf0\u538b\u57ae\u6570\u636e\u5e93\u3002<\/p>\n<h5 id=\"%E2%80%8B%E2%80%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E2%80%8B%E2%80%8B\">\u200b\u200b\u89e3\u51b3\u65b9\u6848\u200b\u200b<\/h5>\n<li>\n<p>\u200b\u200b\u5206\u6563\u8fc7\u671f\u65f6\u95f4\u200b\u200b<\/p>\n<ul>\n<li>\u57fa\u7840 TTL &#043; \u968f\u673a\u504f\u79fb\u503c&#xff08;\u5982 60\u00b110\u5206\u949f&#xff09;&#xff0c;\u907f\u514d\u96c6\u4e2d\u5931\u6548\u3002<\/li>\n<li>\u200b\u200b\u4ee3\u7801\u793a\u4f8b\u200b\u200b&#xff1a; long ttl &#061; 3600 &#043; ThreadLocalRandom.current().nextInt(600); \/\/ \u968f\u673aTTL <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u591a\u7ea7\u7f13\u5b58\u67b6\u6784\u200b\u200b<\/p>\n<ul>\n<li>\u672c\u5730\u7f13\u5b58&#xff08;Caffeine\/Guava&#xff09;\u2192 Redis \u2192 \u6570\u636e\u5e93&#xff0c;\u5c42\u7ea7\u7f13\u51b2\u6d41\u91cf\u3002<\/li>\n<li>\u200b\u200b\u672c\u5730\u7f13\u5b58\u4f5c\u7528\u200b\u200b&#xff1a;\u5373\u4f7f Redis \u5b95\u673a&#xff0c;\u4ecd\u53ef\u62b5\u6321\u90e8\u5206\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u9ad8\u53ef\u7528\u4e0e\u964d\u7ea7\u200b\u200b<\/p>\n<ul>\n<li>\u200b\u200bRedis \u96c6\u7fa4\u200b\u200b&#xff1a;Sentinel \u6216 Cluster \u6a21\u5f0f\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u3002<\/li>\n<li>\u200b\u200b\u7194\u65ad\u964d\u7ea7\u200b\u200b&#xff1a;Hystrix\/Sentinel \u5728\u6570\u636e\u5e93\u538b\u529b\u5927\u65f6\u8fd4\u56de\u9ed8\u8ba4\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u200b\u200b\u6570\u636e\u9884\u70ed\u200b\u200b<\/p>\n<ul>\n<li>\u7cfb\u7edf\u542f\u52a8\u65f6\u6216\u4f4e\u5cf0\u671f\u9884\u52a0\u8f7d\u70ed\u70b9\u6570\u636e\u3002<\/li>\n<li>\u200b\u200b\u793a\u4f8b\u200b\u200b&#xff1a;\u5b9a\u65f6\u4efb\u52a1\u5237\u65b0\u6b21\u65e5\u5c06\u8fc7\u671f\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4 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