{"id":98132,"date":"2024-10-21T00:03:19","date_gmt":"2024-10-20T16:03:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/98132\/"},"modified":"2024-10-21T00:03:20","modified_gmt":"2024-10-20T16:03:20","slug":"redis-%e6%9f%a5%e8%a9%a2%e5%bf%ab%e5%8f%96%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e5%88%86%e9%a0%81%e6%8a%80%e8%a1%93","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/98132\/","title":{"rendered":"Redis \u67e5\u8a62\u5feb\u53d6\u5be6\u73fe\u9ad8\u6548\u5206\u9801\u6280\u8853"},"content":{"rendered":"

Redis \u67e5\u8a62\u5feb\u53d6\u5be6\u73fe\u9ad8\u6548\u5206\u9801\u6280\u8853<\/h1>\n

\u5728\u7576\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u7684\u5feb\u901f\u5b58\u53d6\u548c\u9ad8\u6548\u7684\u5206\u9801\u6280\u8853\u662f\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002Redis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u56e0\u5176\u5feb\u901f\u7684\u67e5\u8a62\u80fd\u529b\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\uff0c\u6210\u70ba\u4e86\u5be6\u73fe\u9ad8\u6548\u5206\u9801\u6280\u8853\u7684\u7406\u60f3\u9078\u64c7\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u67e5\u8a62\u5feb\u53d6\u4f86\u5be6\u73fe\u9ad8\u6548\u7684\u5206\u9801\u6280\u8853\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u5206\u9801\u6280\u8853\uff1f<\/h2>\n

\u5206\u9801\u6280\u8853\u662f\u5c07\u5927\u91cf\u6578\u64da\u5206\u6210\u591a\u500b\u5c0f\u90e8\u5206\uff08\u5373\u9801\u9762\uff09\u9032\u884c\u986f\u793a\u7684\u6280\u8853\u3002\u9019\u6a23\u4e0d\u50c5\u80fd\u6e1b\u5c11\u4e00\u6b21\u6027\u52a0\u8f09\u7684\u6578\u64da\u91cf\uff0c\u9084\u80fd\u63d0\u9ad8\u7528\u6236\u7684\u700f\u89bd\u6548\u7387\u3002\u5e38\u898b\u7684\u5206\u9801\u65b9\u5f0f\u6709\u57fa\u65bc\u504f\u79fb\u91cf\u7684\u5206\u9801\u548c\u57fa\u65bc\u6e38\u6a19\u7684\u5206\u9801\u3002<\/p>\n

\u57fa\u65bc\u504f\u79fb\u91cf\u7684\u5206\u9801<\/h3>\n

\u57fa\u65bc\u504f\u79fb\u91cf\u7684\u5206\u9801\u662f\u6700\u5e38\u898b\u7684\u5206\u9801\u65b9\u5f0f\uff0c\u901a\u5e38\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u53e5\u4e2d\u7684 LIMIT \u548c OFFSET \u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff1a<\/p>\n

SELECT * FROM articles LIMIT 10 OFFSET 20;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u5f9e\u7b2c 21 \u689d\u958b\u59cb\u7684 10 \u689d\u6578\u64da\u3002\u7136\u800c\uff0c\u7576\u6578\u64da\u91cf\u589e\u5927\u6642\uff0c\u9019\u7a2e\u65b9\u5f0f\u7684\u6027\u80fd\u6703\u9010\u6f38\u4e0b\u964d\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u9700\u8981\u8df3\u904e OFFSET \u6307\u5b9a\u7684\u884c\u6578\uff0c\u9019\u5728\u6578\u64da\u91cf\u9f90\u5927\u6642\u6703\u5c0e\u81f4\u67e5\u8a62\u6548\u7387\u4f4e\u4e0b\u3002<\/p>\n
\u57fa\u65bc\u6e38\u6a19\u7684\u5206\u9801<\/h3>\n
\u57fa\u65bc\u6e38\u6a19\u7684\u5206\u9801\u5247\u662f\u901a\u904e\u8a18\u9304\u7576\u524d\u9801\u9762\u7684\u6700\u5f8c\u4e00\u689d\u6578\u64da\u7684\u552f\u4e00\u6a19\u8b58\u7b26\u4f86\u5be6\u73fe\u7684\u3002\u9019\u7a2e\u65b9\u5f0f\u5728\u6578\u64da\u91cf\u5927\u6642\u6027\u80fd\u66f4\u4f73\uff0c\u56e0\u70ba\u5b83\u4e0d\u9700\u8981\u8df3\u904e\u884c\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM articles WHERE id > last_seen_id LIMIT 10;<\/code><\/pre>\n
Redis \u5728\u5206\u9801\u4e2d\u7684\u61c9\u7528<\/h2>\n
Redis \u53ef\u4ee5\u4f5c\u70ba\u67e5\u8a62\u5feb\u53d6\uff0c\u986f\u8457\u63d0\u9ad8\u5206\u9801\u67e5\u8a62\u7684\u6027\u80fd\u3002\u901a\u904e\u5c07\u67e5\u8a62\u7d50\u679c\u7de9\u5b58\u5728 Redis \u4e2d\uff0c\u5f8c\u7e8c\u7684\u67e5\u8a62\u53ef\u4ee5\u76f4\u63a5\u5f9e Redis \u4e2d\u7372\u53d6\u6578\u64da\uff0c\u800c\u7121\u9700\u6bcf\u6b21\u90fd\u67e5\u8a62\u6578\u64da\u5eab\u3002<\/p>\n
\u5be6\u73fe\u6b65\u9a5f<\/h3>\n
    \n
  1. \u8a2d\u7f6e Redis \u5feb\u53d6\uff1a<\/strong>\u5728\u61c9\u7528\u4e2d\u96c6\u6210 Redis\uff0c\u4e26\u8a2d\u7f6e\u9023\u63a5\u3002<\/li>\n
  2. \u67e5\u8a62\u6578\u64da\u4e26\u7de9\u5b58\uff1a<\/strong>\u7576\u7528\u6236\u8acb\u6c42\u67d0\u4e00\u9801\u7684\u6578\u64da\u6642\uff0c\u9996\u5148\u6aa2\u67e5 Redis \u4e2d\u662f\u5426\u5b58\u5728\u8a72\u9801\u7684\u6578\u64da\u3002\u5982\u679c\u5b58\u5728\uff0c\u5247\u76f4\u63a5\u8fd4\u56de\uff1b\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u4e26\u5c07\u7d50\u679c\u7de9\u5b58\u5230 Redis \u4e2d\u3002<\/li>\n
  3. \u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff1a<\/strong>\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u7684\u6642\u6548\u6027\uff0c\u53ef\u4ee5\u70ba Redis \u4e2d\u7684\u5feb\u53d6\u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff0c\u5b9a\u671f\u66f4\u65b0\u6578\u64da\u3002<\/li>\n<\/ol>\n
    \u793a\u4f8b\u4ee3\u78bc<\/h3>\n
    \u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 Redis \u4f86\u5be6\u73fe\u5206\u9801\u67e5\u8a62\uff1a<\/p>\n
    \nimport redis\nimport pymysql\n\n# \u9023\u63a5 Redis\nr = redis.Redis(host='localhost', port=6379, db=0)\n\n# \u9023\u63a5 MySQL\ndb = pymysql.connect(\"localhost\", \"user\", \"password\", \"database\")\n\ndef get_articles(page, page_size):\n    cache_key = f'articles_page_{page}'\n    \n    # \u6aa2\u67e5 Redis \u5feb\u53d6\n    cached_data = r.get(cache_key)\n    if cached_data:\n        return cached_data  # \u8fd4\u56de\u5feb\u53d6\u6578\u64da\n    \n    # \u5982\u679c\u5feb\u53d6\u4e0d\u5b58\u5728\uff0c\u67e5\u8a62\u6578\u64da\u5eab\n    offset = (page - 1) * page_size\n    cursor = db.cursor()\n    cursor.execute(f\"SELECT * FROM articles LIMIT {page_size} OFFSET {offset}\")\n    articles = cursor.fetchall()\n    \n    # \u5c07\u67e5\u8a62\u7d50\u679c\u7de9\u5b58\u5230 Redis\n    r.set(cache_key, articles, ex=3600)  # \u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba 1 \u5c0f\u6642\n    \n    return articles\n<\/code><\/pre>\n
    \u7d50\u8ad6<\/h2>\n
    \u5229\u7528 Redis \u67e5\u8a62\u5feb\u53d6\u4f86\u5be6\u73fe\u9ad8\u6548\u7684\u5206\u9801\u6280\u8853\uff0c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u901f\u5ea6\uff0c\u9084\u80fd\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u7684\u58d3\u529b\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9019\u7a2e\u6280\u8853\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u5b58\u53d6\u7684\u61c9\u7528\u4f86\u8aaa\uff0cRedis \u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002<\/p>\n
    \u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc \u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u63a2\u7d22\u5982\u4f55\u5229\u7528 Redis \u67e5\u8a62\u5feb\u53d6\u5be6\u73fe\u9ad8\u6548\u5206\u9801\u6280\u8853\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u901f\u5ea6\u8207\u7528\u6236\u9ad4\u9a57\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-98132","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98132","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=98132"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98132\/revisions"}],"predecessor-version":[{"id":98133,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98132\/revisions\/98133"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=98132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=98132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=98132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}