{"id":201326,"date":"2025-05-10T10:09:55","date_gmt":"2025-05-10T02:09:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201326\/"},"modified":"2025-05-10T10:09:55","modified_gmt":"2025-05-10T02:09:55","slug":"redis%e5%8e%bb%e9%87%8d%e7%9a%843%e7%a7%8d%e4%b8%8d%e5%90%8c%e6%96%b9%e6%b3%95%e6%b1%87%e6%80%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201326\/","title":{"rendered":"Redis\u53bb\u91cd\u76843\u79cd\u4e0d\u540c\u65b9\u6cd5\u6c47\u603b"},"content":{"rendered":"

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

Redis\u53bb\u91cd\u76843\u79cd\u4e0d\u540c\u65b9\u6cd5\u6c47\u603b<\/h1>\n

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

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aRedis\u53bb\u91cd\u76843\u79cd\u4e0d\u540c\u65b9\u6cd5\u6c47\u603b\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\u552f\u4e00\u8ba1\u6570\u662f\u7f51\u7ad9\u7cfb\u7edf\u4e2d\u5341\u5206\u5e38\u89c1\u7684\u4e00\u4e2a\u529f\u80fd\u7279\u6027\uff0c\u4f8b\u5982\u7f51\u7ad9\u9700\u8981\u7edf\u8ba1\u6bcf\u5929\u8bbf\u95ee\u7684\u4eba\u6570 unique visitor \uff08\u4e5f\u5c31\u662f UV\uff09\u3002\u8ba1\u6570\u95ee\u9898\u5f88\u5e38\u89c1\uff0c\u4f46\u89e3\u51b3\u8d77\u6765\u53ef\u80fd\u5341\u5206\u590d\u6742\uff1a\u4e00\u662f\u9700\u8981\u8ba1\u6570\u7684\u91cf\u53ef\u80fd\u5f88\u5927\uff0c\u6bd4\u5982\u5927\u578b\u7684\u7ad9\u70b9\u6bcf\u5929\u6709\u6570\u767e\u4e07\u7684\u4eba\u8bbf\u95ee\uff0c\u6570\u636e\u91cf\u76f8\u5f53\u5927\uff1b\u4e8c\u662f\u901a\u5e38\u8fd8\u5e0c\u671b\u6269\u5c55\u8ba1\u6570\u7684\u7ef4\u5ea6\uff0c\u6bd4\u5982\u9664\u4e86\u9700\u8981\u6bcf\u5929\u7684 UV\uff0c\u8fd8\u60f3\u77e5\u9053\u6bcf\u5468\u6216\u6bcf\u6708\u7684 UV\uff0c\u8fd9\u6837\u5bfc\u81f4\u8ba1\u7b97\u5341\u5206\u590d\u6742\u3002<\/p>\n

\u5728\u5173\u7cfb\u6570\u636e\u5e93\u5b58\u50a8\u7684\u7cfb\u7edf\u91cc\uff0c\u5b9e\u73b0\u552f\u4e00\u8ba1\u6570\u7684\u65b9\u6cd5\u5c31\u662f select count(distinct )\uff0c\u5b83\u5341\u5206\u7b80\u5355\uff0c\u4f46\u662f\u5982\u679c\u6570\u636e\u91cf\u5f88\u5927\uff0c\u8fd9\u4e2a\u8bed\u53e5\u6267\u884c\u662f\u5f88\u6162\u7684\u3002\u7528\u5173\u7cfb\u6570\u636e\u5e93\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u662f\u63d2\u5165\u6570\u636e\u6027\u80fd\u4e5f\u4e0d\u9ad8\u3002 <\/p>\n

Redis \u89e3\u51b3\u8fd9\u7c7b\u8ba1\u6570\u95ee\u9898\u5f97\u5fc3\u5e94\u624b\uff0c\u76f8\u6bd4\u5173\u7cfb\u6570\u636e\u5e93\u901f\u5ea6\u66f4\u5feb\uff0c\u6d88\u8017\u8d44\u6e90\u66f4\u5c11\uff0c\u751a\u81f3\u63d0\u4f9b\u4e86 3 \u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u3002<\/p>\n

1.\u57fa\u4e8e set
<\/h2>\n

Redis \u7684 set \u7528\u4e8e\u4fdd\u5b58\u552f\u4e00\u7684\u6570\u636e\u96c6\u5408\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u5feb\u901f\u5224\u65ad\u67d0\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5b58\u5728\u4e8e\u96c6\u5408\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u5feb\u901f\u8ba1\u7b97\u67d0\u4e00\u4e2a\u96c6\u5408\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u53e6\u5916\u548c\u53ef\u4ee5\u5408\u5e76\u96c6\u5408\u5230\u4e00\u4e2a\u65b0\u7684\u96c6\u5408\u4e2d\u3002\u6d89\u53ca\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n

\u590d\u5236\u4ee3\u7801 \u4ee3\u7801\u5982\u4e0b:<\/p>\n

\nSISMEMBER key member  # \u5224\u65ad member \u662f\u5426\u5b58\u5728\nSADD key member  # \u5f80\u96c6\u5408\u4e2d\u52a0\u5165 member\nSCARD key   # \u83b7\u53d6\u96c6\u5408\u5143\u7d20\u4e2a\u6570 \n<\/pre>\n
\u57fa\u4e8e set \u7684\u65b9\u6cd5\u7b80\u5355\u6709\u6548\uff0c\u8ba1\u6570\u7cbe\u786e\uff0c\u9002\u7528\u9762\u5e7f\uff0c\u6613\u4e8e\u7406\u89e3\uff0c\u5b83\u7684\u7f3a\u70b9\u662f\u6d88\u8017\u8d44\u6e90\u6bd4\u8f83\u5927\uff08\u5f53\u7136\u6bd4\u8d77\u5173\u7cfb\u6570\u636e\u5e93\u662f\u5c11\u5f88\u591a\u7684\uff09\uff0c\u5982\u679c\u5143\u7d20\u4e2a\u6570\u5f88\u5927\uff08\u6bd4\u5982\u4e0a\u4ebf\u7684\u8ba1\u6570\uff09\uff0c\u6d88\u8017\u5185\u5b58\u5f88\u6050\u6016\u3002<\/p>\n
2.\u57fa\u4e8e bit
<\/h2>\n
Redis \u7684 bit \u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u6bd4 set \u5185\u5b58\u9ad8\u5ea6\u538b\u7f29\u7684\u8ba1\u6570\uff0c\u5b83\u901a\u8fc7\u4e00\u4e2a bit 1 \u6216 0 \u6765\u5b58\u50a8\u67d0\u4e2a\u5143\u7d20\u662f\u5426\u5b58\u5728\u4fe1\u606f\u3002\u4f8b\u5982\u7f51\u7ad9\u552f\u4e00\u8bbf\u5ba2\u8ba1\u6570\uff0c\u53ef\u4ee5\u628a user_id \u4f5c\u4e3a bit \u7684\u504f\u79fb\u91cf offset\uff0c\u8bbe\u7f6e\u4e3a 1 \u8868\u793a\u6709\u8bbf\u95ee\uff0c\u4f7f\u7528 1 MB\u7684\u7a7a\u95f4\u5c31\u53ef\u4ee5\u5b58\u653e 800 \u591a\u4e07\u7528\u6237\u7684\u4e00\u5929\u8bbf\u95ee\u8ba1\u6570\u60c5\u51b5\u3002\u6d89\u53ca\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
\u590d\u5236\u4ee3\u7801 \u4ee3\u7801\u5982\u4e0b:<\/p>\n
\nSETBIT key offset value  # \u8bbe\u7f6e\u4f4d\u4fe1\u606f\nGETBIT key offset        # \u83b7\u53d6\u4f4d\u4fe1\u606f\nBITCOUNT key [start end] # \u8ba1\u6570\nBITOP operation destkey key [key ...]  # \u4f4d\u56fe\u5408\u5e76 \n<\/pre>\n
\u57fa\u4e8e bit \u7684\u65b9\u6cd5\u6bd4\u8d77 set \u7a7a\u95f4\u6d88\u8017\u5c0f\u5f97\u591a\uff0c\u4f46\u662f\u5b83\u8981\u6c42\u5143\u7d20\u80fd\u5426\u7b80\u5355\u6620\u5c04\u4e3a\u4f4d\u504f\u79fb\uff0c\u9002\u7528\u9762\u7a84\u4e86\u4e0d\u5c11\uff0c\u53e6\u5916\u5b83\u6d88\u8017\u7684\u7a7a\u95f4\u53d6\u51b3\u4e8e\u6700\u5927\u504f\u79fb\u91cf\uff0c\u548c\u8ba1\u6570\u503c\u65e0\u5173\uff0c\u5982\u679c\u6700\u5927\u504f\u79fb\u91cf\u5f88\u5927\uff0c\u6d88\u8017\u5185\u5b58\u4e5f\u76f8\u5f53\u53ef\u89c2\u3002<\/p>\n
3.\u57fa\u4e8e HyperLogLog
<\/h2>\n
\u5b9e\u73b0\u8d85\u5927\u6570\u636e\u91cf\u7cbe\u786e\u7684\u552f\u4e00\u8ba1\u6570\u90fd\u662f\u6bd4\u8f83\u56f0\u96be\u7684\uff0c\u4f46\u662f\u5982\u679c\u53ea\u662f\u8fd1\u4f3c\u7684\u8bdd\uff0c\u8ba1\u7b97\u79d1\u5b66\u91cc\u6709\u5f88\u591a\u9ad8\u6548\u7684\u7b97\u6cd5\uff0c\u5176\u4e2d HyperLogLog Counting \u5c31\u662f\u5176\u4e2d\u975e\u5e38\u8457\u540d\u7684\u7b97\u6cd5\uff0c\u5b83\u53ef\u4ee5\u4ec5\u4ec5\u4f7f\u7528 12 k\u5de6\u53f3\u7684\u5185\u5b58\uff0c\u5b9e\u73b0\u4e0a\u4ebf\u7684\u552f\u4e00\u8ba1\u6570\uff0c\u800c\u4e14\u8bef\u5dee\u63a7\u5236\u5728\u767e\u5206\u4e4b\u4e00\u5de6\u53f3\u3002\u6d89\u53ca\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
\u590d\u5236\u4ee3\u7801 \u4ee3\u7801\u5982\u4e0b:<\/p>\n
\nPFADD key element [element ...]  # \u52a0\u5165\u5143\u7d20\nPFCOUNT key [key ...]   # \u8ba1\u6570\n<\/pre>\n
\u8fd9\u79cd\u8ba1\u6570\u65b9\u6cd5\u771f\u7684\u5f88\u795e\u5947\uff0c\u6211\u4e5f\u6ca1\u6709\u5f7b\u5e95\u5f04\u660e\u767d\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u6df1\u5165\u7814\u7a76\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n
redis \u63d0\u4f9b\u7684\u8fd9\u4e09\u79cd\u552f\u4e00\u8ba1\u6570\u65b9\u5f0f\u5404\u6709\u4f18\u52a3\uff0c\u53ef\u4ee5\u5145\u5206\u6ee1\u8db3\u4e0d\u540c\u60c5\u51b5\u4e0b\u7684\u8ba1\u6570\u8981\u6c42\u3002<\/p>\n
4. \u57fa\u4e8ebloomfilter
<\/h2>\n
BloomFilter\u662f\u5229\u7528\u7c7b\u4f3c\u4f4d\u56fe\u6216\u8005\u4f4d\u96c6\u5408\u6570\u636e\u7ed3\u6784\u6765\u5b58\u50a8\u6570\u636e\uff0c\u5229\u7528\u4f4d\u6570\u7ec4\u6765\u7b80\u6d01\u7684\u8868\u793a\u4e00\u4e2a\u96c6\u5408\uff0c\u5e76\u4e14\u80fd\u591f\u5feb\u901f\u7684\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u4e0d\u662f\u5df2\u7ecf\u5b58\u5728\u4e8e\u8fd9\u4e2a\u96c6\u5408\u3002\u867d\u7136BloomFilter\u4e0d\u662f100%\u51c6\u786e\uff0c\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7\u8c03\u8282\u53c2\u6570\uff0c\u4f7f\u7528Hash\u51fd\u6570\u7684\u4e2a\u6570\uff0c\u4f4d\u6570\u7ec4\u7684\u5927\u5c0f\u6765\u964d\u4f4e\u5931\u8bef\u7387\u3002\u8fd9\u6837\u8c03\u8282\u5b8c\u5168\u53ef\u4ee5\u628a\u5931\u8bef\u7387\u964d\u4f4e\u5230\u63a5\u8fd1\u4e8e0\u3002\u53ef\u4ee5\u6ee1\u8db3\u5927\u90e8\u5206\u573a\u666f\u4e86\u3002<\/p>\n
redis\u4f7f\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u9700\u8981\u5b89\u88c5\u63d2\u4ef6\uff1a<\/p>\n
\u603b\u7ed3<\/h2>\n","protected":false},"excerpt":{"rendered":"
Redis\u53bb\u91cd\u76843\u79cd\u4e0d\u540c\u65b9\u6cd5\u6c47\u603b...<\/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-201326","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201326","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=201326"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201326\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}