{"id":201578,"date":"2025-05-10T08:12:40","date_gmt":"2025-05-10T00:12:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201578\/"},"modified":"2025-05-10T08:12:40","modified_gmt":"2025-05-10T00:12:40","slug":"redis%e5%ae%9e%e7%8e%b0uv%e7%bb%9f%e8%ae%a1%e7%9a%84%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201578\/","title":{"rendered":"Redis\u5b9e\u73b0UV\u7edf\u8ba1\u7684\u793a\u4f8b\u4ee3\u7801"},"content":{"rendered":"

<\/b> <\/p>\n

Redis\u5b9e\u73b0UV\u7edf\u8ba1\u7684\u793a\u4f8b\u4ee3\u7801<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4eca\u5929golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\u300aRedis\u5b9e\u73b0UV\u7edf\u8ba1\u7684\u793a\u4f8b\u4ee3\u7801\u300b<\/span>\uff0c\u5176\u4e2d\u6d89\u53ca\u5230\u7684\u77e5\u8bc6\u70b9\u5305\u62ecRedisUV\u7edf\u8ba1<\/span>\u7b49\u7b49\uff0c\u65e0\u8bba\u4f60\u662f\u5c0f\u767d\u8fd8\u662f\u8001\u624b\uff0c\u90fd\u9002\u5408\u770b\u4e00\u770b\u54e6~\u6709\u597d\u7684\u5efa\u8bae\u4e5f\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u82e5\u662f\u770b\u5b8c\u6709\u6240\u6536\u83b7\uff0c\u4e5f\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u70b9\u8d5e\u652f\u6301\u5440\uff01\u4e00\u8d77\u52a0\u6cb9\u5b66\u4e60~<\/p>\n

\u4e00\u3001HyperLogLog<\/h2>\n

1\u3001\u4e3a\u4ec0\u4e48\u7528HyperLogLog<\/h3>\n

\u5148\u4ecb\u7ecd\u4e24\u4e2a\u6982\u5ff5\uff1a<\/p>\n

UV\uff1a<\/strong>\u5168\u79f0 Unique Visitor\uff0c\u4e5f\u53eb\u72ec\u7acb\u8bbf\u5ba2\u91cf\uff0c\u662f\u6307\u901a\u8fc7\u4e92\u8054\u7f51\u8bbf\u95ee\u3001\u6d4f\u89c8\u8fd9\u4e2a\u7f51\u9875\u7684\u81ea\u7136\u4eba\u30011 \u5929\u5185\u540c\u4e00\u4e2a\u7528\u6237\u591a\u6b21\u8bbf\u95ee\u8be5\u7f51\u7ad9\uff0c\u53ea\u8bb0\u5f55 1 \u6b21\u3002
PV\uff1a<\/strong>\u5168\u79f0 Page View\uff0c\u4e5f\u53eb\u9875\u9762\u8bbf\u95ee\u91cf\u6216\u70b9\u51fb\u91cf\uff0c\u7528\u6237\u6bcf\u8bbf\u95ee\u7f51\u7ad9\u7684\u4e00\u4e2a\u9875\u9762\uff0c\u8bb0\u5f55\u4e00\u6b21 PV\uff0c\u7528\u6237\u591a\u6b21\u6253\u5f00\u9875\u9762\uff0c\u5219\u8bb0\u5f55\u591a\u6b21 PV\u3002\u5f80\u5f80\u7528\u6765\u8861\u91cf\u7f51\u7ad9\u7684\u6d41\u91cf\u3002<\/p>\n

UV \u7edf\u8ba1\u5728\u670d\u52a1\u7aef\u505a\u4f1a\u6bd4\u8f83\u9ebb\u70e6\uff0c\u56e0\u4e3a\u8981\u5224\u65ad\u8be5\u7528\u6237\u662f\u5426\u5df2\u7ecf\u7edf\u8ba1\u8fc7\u4e86\uff0c\u9700\u8981\u5c06\u7edf\u8ba1\u8fc7\u7684\u7528\u6237\u4fe1\u606f\u4fdd\u5b58\u3002\u4f46\u662f\u5982\u679c\u6bcf\u4e2a\u8bbf\u95ee\u7684\u7528\u6237\u90fd\u4fdd\u5b58\u5230Redis \u4e2d\uff0c\u6570\u636e\u91cf\u4f1a\u975e\u5e38\u6050\u6016\u3002<\/p>\n

\u90a3\u4e48\u6211\u4eec\u8981\u600e\u4e48\u66f4\u597d\u7684\u8bb0\u5f55\u5462\uff1f\u5c31\u7528\u5230 HyperLogLog<\/p>\n

2\u3001HyperLogLog\u662f\u4ec0\u4e48<\/h3>\n

HyperLogLog\uff08HLL\uff09\u662f\u4ece Loglog \u7b97\u6cd5\u6d3e\u751f\u7684\u6982\u7387\u7b97\u6cd5\uff0c\u7528\u4e8e\u786e\u5b9a\u975e\u5e38\u5927\u7684\u96c6\u5408\u7684\u57fa\u6570\uff0c\u800c\u4e0d\u9700\u8981\u5b58\u50a8\u5176\u6240\u6709\u503c\u3002<\/p>\n

Redis \u4e2d\u7684 HLL \u662f\u57fa\u4e8e String \u7ed3\u6784\u5b9e\u73b0\u7684\uff0c\u5355\u4e2a HLL \u7684\u5185\u5b58\u6c38\u8fdc\u5c0f\u4e8e 16kb\uff0c\u5185\u5b58\u5360\u7528\u4f4e\u7684\u4ee4\u4eba\u53d1\u6307\uff01\u4f5c\u4e3a\u4ee3\u4ef7\uff0c\u5176\u6d4b\u91cf\u7ed3\u679c\u662f\u6982\u7387\u6027\u7684\uff0c\u6709\u5c0f\u4e8e 0.81% \u7684\u8bef\u5dee\u3002\u4e0d\u8fc7\u5bf9\u4e8e UV \u7edf\u8ba1\u6765\u8bf4\uff0c\u8fd9\u5b8c\u5168\u53ef\u4ee5\u5ffd\u7565\u3002<\/p>\n

\u4e0d\u7ba1\u52a0\u5165\u591a\u5c11\u91cd\u590d\u5143\u7d20\uff0cHyperLogLog\u90fd\u53ea\u8bb0\u5f55\u4e00\u6b21\uff0c\u5929\u751f\u9002\u5408\u505auv\u7684\u7edf\u8ba1<\/p>\n

<\/p>\n

\u4e8c\u3001\u5b9e\u73b0UV\u7edf\u8ba1<\/h2>\n

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@Test\nvoid testHyperLogLog() {\n    String[] values = new String[1000];\n    int j = 0;\n    for (int i = 0; i \n
\u6d4b\u8bd5\u7ed3\u679c\uff1a<\/p>\n
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Redis\u5b9e\u73b0UV\u7edf\u8ba1\u7684\u793a\u4f8b\u4ee3\u7801...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201578","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201578","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201578"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201578\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}