{"id":167689,"date":"2024-11-06T04:14:43","date_gmt":"2024-11-05T20:14:43","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167689\/"},"modified":"2024-11-06T04:14:44","modified_gmt":"2024-11-05T20:14:44","slug":"%e5%88%a9%e7%94%a8redis%e5%af%a6%e7%8f%be%e5%85%a8%e9%8d%b5%e5%80%bc%e7%b5%b1%e8%a8%88%ef%bc%88redis%e7%b5%b1%e8%a8%88%e6%89%80%e6%9c%89key%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167689\/","title":{"rendered":"\u5229\u7528Redis\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08\uff08redis\u7d71\u8a08\u6240\u6709key\uff09"},"content":{"rendered":"

\u5229\u7528Redis\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08\uff08redis\u7d71\u8a08\u6240\u6709key\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u5feb\u901f\u4e14\u9ad8\u6548\u7684\u6578\u64da\u5b58\u53d6\u6210\u70ba\u4e86\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u7684\u6838\u5fc3\u9700\u6c42\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6027\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5feb\u901f\u7684\u8b80\u5beb\u901f\u5ea6\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n

\u4ec0\u9ebc\u662fRedis\uff1f<\/h2>\n

Redis\uff08Remote Dictionary Server\uff09\u662f\u4e00\u500b\u958b\u6e90\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u7b49\u3002\u7531\u65bc\u5176\u9ad8\u6548\u7684\u6027\u80fd\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

\u5168\u9375\u503c\u7d71\u8a08\u7684\u9700\u6c42<\/h2>\n

\u5728\u8a31\u591a\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u9700\u8981\u5c0d\u5b58\u5132\u5728Redis\u4e2d\u7684\u6240\u6709\u9375\u9032\u884c\u7d71\u8a08\u5206\u6790\u3002\u4f8b\u5982\uff0c\u7d71\u8a08\u9375\u7684\u6578\u91cf\u3001\u9375\u7684\u985e\u578b\u3001\u9375\u7684\u904e\u671f\u6642\u9593\u7b49\u4fe1\u606f\u3002\u9019\u4e9b\u7d71\u8a08\u6578\u64da\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u4e86\u89e3\u6578\u64da\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u9032\u800c\u512a\u5316\u6578\u64da\u5b58\u5132\u548c\u67e5\u8a62\u7b56\u7565\u3002<\/p>\n

\u5982\u4f55\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08<\/h2>\n

\u8981\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528Redis\u63d0\u4f9b\u7684\u547d\u4ee4\u548c\u4e00\u4e9b\u7c21\u55ae\u7684\u8173\u672c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528SCAN\u547d\u4ee4<\/h3>\n

Redis\u7684SCAN\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u904d\u6b77\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u9375\u3002\u8207KEYS\u547d\u4ee4\u4e0d\u540c\uff0cSCAN\u547d\u4ee4\u4e0d\u6703\u963b\u585eRedis\u670d\u52d9\u5668\uff0c\u9069\u5408\u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\u3002<\/p>\n

SCAN 0<\/code><\/pre>\n
\u9019\u500b\u547d\u4ee4\u6703\u8fd4\u56de\u4e00\u500b\u6e38\u6a19\u548c\u4e00\u7d44\u9375\u3002\u901a\u904e\u4e0d\u65b7\u8abf\u7528SCAN\u547d\u4ee4\uff0c\u53ef\u4ee5\u904d\u6b77\u6240\u6709\u7684\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Python\u793a\u4f8b\uff1a<\/p>\n
import redis\n\nr = redis.Redis(host='localhost', port=6379, db=0)\ncursor = 0\nkey_count = 0\n\nwhile True:\n    cursor, keys = r.scan(cursor)\n    key_count += len(keys)\n    if cursor == 0:\n        break\n\nprint(f\"\u7e3d\u9375\u6578: {key_count}\")<\/code><\/pre>\n
2. \u7d71\u8a08\u9375\u7684\u985e\u578b<\/h3>\n
\u9664\u4e86\u7d71\u8a08\u9375\u7684\u6578\u91cf\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u7d71\u8a08\u4e0d\u540c\u985e\u578b\u7684\u9375\u3002\u53ef\u4ee5\u4f7f\u7528TYPE\u547d\u4ee4\u4f86\u7372\u53d6\u6bcf\u500b\u9375\u7684\u985e\u578b\u3002<\/p>\n
key_type = r.type(key)<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u7d71\u8a08\u4e0d\u540c\u985e\u578b\u9375\u7684\u793a\u4f8b\uff1a<\/p>\n
key_types = {}\n\ncursor = 0\nwhile True:\n    cursor, keys = r.scan(cursor)\n    for key in keys:\n        key_type = r.type(key).decode('utf-8')\n        if key_type in key_types:\n            key_types[key_type] += 1\n        else:\n            key_types[key_type] = 1\n    if cursor == 0:\n        break\n\nprint(\"\u9375\u985e\u578b\u7d71\u8a08:\", key_types)<\/code><\/pre>\n
3. \u9375\u7684\u904e\u671f\u6642\u9593<\/h3>\n
\u5c0d\u65bc\u9700\u8981\u904e\u671f\u7684\u9375\uff0c\u4e86\u89e3\u5176\u904e\u671f\u6642\u9593\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528TTL\u547d\u4ee4\u4f86\u7372\u53d6\u6bcf\u500b\u9375\u7684\u5269\u9918\u751f\u5b58\u6642\u9593\u3002<\/p>\n
ttl = r.ttl(key)<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u7d71\u8a08\u6240\u6709\u9375\u7684\u904e\u671f\u6642\u9593\u7684\u793a\u4f8b\uff1a<\/p>\n
key_ttl = {}\n\ncursor = 0\nwhile True:\n    cursor, keys = r.scan(cursor)\n    for key in keys:\n        ttl = r.ttl(key)\n        key_ttl[key.decode('utf-8')] = ttl\n    if cursor == 0:\n        break\n\nprint(\"\u9375\u7684\u904e\u671f\u6642\u9593:\", key_ttl)<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5229\u7528Redis\u9032\u884c\u5168\u9375\u503c\u7d71\u8a08\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u7ba1\u7406\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528SCAN\u547d\u4ee4\u3001TYPE\u547d\u4ee4\u548cTTL\u547d\u4ee4\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7372\u53d6\u9375\u7684\u6578\u91cf\u3001\u985e\u578b\u548c\u904e\u671f\u6642\u9593\u7b49\u4fe1\u606f\u3002\u9019\u4e9b\u7d71\u8a08\u6578\u64da\u4e0d\u50c5\u80fd\u5920\u5e6b\u52a9\u512a\u5316\u6578\u64da\u5b58\u5132\u7b56\u7565\uff0c\u9084\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684Redis\u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u4e86\u7a69\u5b9a\u4e14\u9ad8\u6027\u80fd\u7684 \u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5229\u7528Redis\u5be6\u73fe\u5168\u9375\u503c\u7d71\u8a08\uff0c\u8f15\u9b06\u7372\u53d6\u6240\u6709key\u7684\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u52a9\u529b\u696d\u52d9\u6c7a\u7b56\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-167689","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167689","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=167689"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167689\/revisions"}],"predecessor-version":[{"id":167690,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167689\/revisions\/167690"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}