{"id":128673,"date":"2024-10-26T15:54:13","date_gmt":"2024-10-26T07:54:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128673\/"},"modified":"2024-10-26T15:54:14","modified_gmt":"2024-10-26T07:54:14","slug":"redis%e5%af%a6%e7%8f%be%e8%a8%88%e7%ae%97%e6%b1%82%e5%8f%96%e5%9d%87%e5%80%bc%e7%9a%84%e6%96%b9%e6%a1%88%ef%bc%88redis%e6%b1%82%e5%9d%87%e5%80%bc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128673\/","title":{"rendered":"Redis\u5be6\u73fe\u8a08\u7b97\u6c42\u53d6\u5747\u503c\u7684\u65b9\u6848\uff08redis\u6c42\u5747\u503c\uff09"},"content":{"rendered":"<h1 id=\"redis%e5%af%a6%e7%8f%be%e8%a8%88%e7%ae%97%e6%b1%82%e5%8f%96%e5%9d%87%e5%80%bc%e7%9a%84%e6%96%b9%e6%a1%88%ef%bc%88redis%e6%b1%82%e5%9d%87%e5%80%bc%ef%bc%89-bcrNVGjcbi\">Redis\u5be6\u73fe\u8a08\u7b97\u6c42\u53d6\u5747\u503c\u7684\u65b9\u6848\uff08redis\u6c42\u5747\u503c\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u5feb\u901f\u4e14\u9ad8\u6548\u5730\u8655\u7406\u6578\u64da\u662f\u6bcf\u500b\u958b\u767c\u8005\u548c\u6578\u64da\u79d1\u5b78\u5bb6\u6240\u8ffd\u6c42\u7684\u76ee\u6a19\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u9ad8\u6548\u5730\u8a08\u7b97\u5747\u503c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u4f86\u5be6\u73fe\u5747\u503c\u8a08\u7b97\u7684\u65b9\u6848\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-bcrNVGjcbi\">Redis\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\u662f\u4e00\u500b\u958b\u6e90\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u652f\u6301\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u7b49\u6578\u64da\u985e\u578b\u3002\u7531\u65bc\u5176\u9ad8\u6548\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\uff0cRedis\u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e5%9d%87%e5%80%bc%e8%a8%88%e7%ae%97%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86-bcrNVGjcbi\">\u5747\u503c\u8a08\u7b97\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u5747\u503c\uff08Mean\uff09\u662f\u7d71\u8a08\u5b78\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u901a\u5e38\u7528\u4f86\u8868\u793a\u4e00\u7d44\u6578\u64da\u7684\u4e2d\u5fc3\u8da8\u52e2\u3002\u8a08\u7b97\u5747\u503c\u7684\u516c\u5f0f\u70ba\uff1a<\/p>\n<pre><code>\u5747\u503c = (\u6578\u64da\u7e3d\u548c) \/ (\u6578\u64da\u500b\u6578)<\/code><\/pre>\n<p>\u5728Redis\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904e\u5b58\u5132\u6578\u64da\u7684\u7e3d\u548c\u548c\u6578\u64da\u7684\u500b\u6578\u4f86\u5be6\u73fe\u5747\u503c\u7684\u8a08\u7b97\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6bcf\u6b21\u8a08\u7b97\u5747\u503c\u6642\u90fd\u9700\u8981\u904d\u6b77\u6574\u500b\u6578\u64da\u96c6\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"redis%e5%af%a6%e7%8f%be%e5%9d%87%e5%80%bc%e8%a8%88%e7%ae%97%e7%9a%84%e6%ad%a5%e9%a9%9f-bcrNVGjcbi\">Redis\u5be6\u73fe\u5747\u503c\u8a08\u7b97\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e5%ad%98%e5%84%b2%e6%95%b8%e6%93%9a-bcrNVGjcbi\">1. \u5b58\u5132\u6578\u64da<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5c07\u6578\u64da\u5b58\u5132\u5230Redis\u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528Redis\u7684\u5b57\u7b26\u4e32\u985e\u578b\u4f86\u5b58\u5132\u6578\u64da\u7684\u7e3d\u548c\u548c\u6578\u64da\u7684\u500b\u6578\u3002<\/p>\n<pre><code>SET total_sum 0\nSET count 0<\/code><\/pre>\n<h3 id=\"2-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-bcrNVGjcbi\">2. \u66f4\u65b0\u6578\u64da<\/h3>\n<p>\u7576\u6709\u65b0\u6578\u64da\u9032\u4f86\u6642\uff0c\u6211\u5011\u9700\u8981\u66f4\u65b0\u7e3d\u548c\u548c\u500b\u6578\u3002\u5047\u8a2d\u65b0\u6578\u64da\u70banew_value\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>INCRBY total_sum new_value\nINCR count<\/code><\/pre>\n<h3 id=\"3-%e8%a8%88%e7%ae%97%e5%9d%87%e5%80%bc-bcrNVGjcbi\">3. \u8a08\u7b97\u5747\u503c<\/h3>\n<p>\u7576\u9700\u8981\u8a08\u7b97\u5747\u503c\u6642\uff0c\u6211\u5011\u53ef\u4ee5\u5f9eRedis\u4e2d\u7372\u53d6\u7e3d\u548c\u548c\u500b\u6578\uff0c\u7136\u5f8c\u9032\u884c\u8a08\u7b97\uff1a<\/p>\n<pre><code>total_sum = GET total_sum\ncount = GET count\nmean = total_sum \/ count<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-bcrNVGjcbi\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Python\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u4f86\u8a08\u7b97\u5747\u503c\uff1a<\/p>\n<pre><code>import redis\n\n# \u9023\u63a5\u5230Redis\nr = redis.Redis(host='localhost', port=6379, db=0)\n\n# \u521d\u59cb\u5316\nr.set('total_sum', 0)\nr.set('count', 0)\n\n# \u65b0\u6578\u64da\nnew_values = [10, 20, 30, 40, 50]\n\nfor value in new_values:\n    r.incrby('total_sum', value)\n    r.incr('count')\n\n# \u8a08\u7b97\u5747\u503c\ntotal_sum = int(r.get('total_sum'))\ncount = int(r.get('count'))\nmean = total_sum \/ count\n\nprint(f'\u5747\u503c\u70ba: {mean}')  # \u8f38\u51fa\u5747\u503c<\/code><\/pre>\n<h2 id=\"%e5%84%aa%e5%8c%96%e8%80%83%e9%87%8f-bcrNVGjcbi\">\u512a\u5316\u8003\u91cf<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u6027\u80fd\u74f6\u9838\u3002\u70ba\u4e86\u512a\u5316\u5747\u503c\u8a08\u7b97\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528Redis\u7684\u6301\u4e45\u5316\u529f\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<li>\u5b9a\u671f\u91cd\u7f6e\u8a08\u7b97\uff0c\u907f\u514dcount\u904e\u5927\u5c0e\u81f4\u7684\u8a08\u7b97\u4e0d\u6e96\u78ba\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528Redis\u7684\u96c6\u7fa4\u6a21\u5f0f\uff0c\u63d0\u5347\u8b80\u5beb\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-bcrNVGjcbi\">\u7d50\u8ad6<\/h2>\n<p>\u5229\u7528Redis\u4f86\u8a08\u7b97\u5747\u503c\u662f\u4e00\u500b\u9ad8\u6548\u4e14\u7c21\u55ae\u7684\u65b9\u6848\u3002\u901a\u904e\u5b58\u5132\u6578\u64da\u7684\u7e3d\u548c\u548c\u500b\u6578\uff0c\u6211\u5011\u53ef\u4ee5\u5feb\u901f\u5730\u7372\u53d6\u5747\u503c\uff0c\u4e26\u4e14\u5728\u6578\u64da\u91cf\u589e\u9577\u7684\u60c5\u6cc1\u4e0b\uff0c\u4ecd\u7136\u80fd\u4fdd\u6301\u826f\u597d\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u5be6\u6642\u6578\u64da\u5206\u6790\u7684\u61c9\u7528\u5834\u666f\uff0cRedis\u7121\u7591\u662f\u4e00\u500b\u7406\u60f3\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u5be6\u73fe\u5747\u503c\u8a08\u7b97\u7684\u9ad8\u6548\u65b9\u6848\uff0c\u4e86\u89e3\u5982\u4f55\u5229\u7528Redis\u6578\u64da\u7d50\u69cb\u8f15\u9b06\u6c42\u53d6\u6578\u64da\u96c6\u7684\u5e73\u5747\u503c\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-128673","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128673","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=128673"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128673\/revisions"}],"predecessor-version":[{"id":128674,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128673\/revisions\/128674"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}