{"id":201724,"date":"2025-05-10T08:20:48","date_gmt":"2025-05-10T00:20:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201724\/"},"modified":"2025-05-10T08:20:48","modified_gmt":"2025-05-10T00:20:48","slug":"redis%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%99%90%e6%b5%81%e6%9c%ba%e5%88%b6%e5%ae%9e%e7%8e%b0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201724\/","title":{"rendered":"Redis\u7684\u5206\u5e03\u5f0f\u9650\u6d41\u673a\u5236\u5b9e\u73b0\u65b9\u6cd5"},"content":{"rendered":"

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

Redis\u7684\u5206\u5e03\u5f0f\u9650\u6d41\u673a\u5236\u5b9e\u73b0\u65b9\u6cd5<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aRedis\u7684\u5206\u5e03\u5f0f\u9650\u6d41\u673a\u5236\u5b9e\u73b0\u65b9\u6cd5\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

\u968f\u7740\u4e92\u8054\u7f51\u5e94\u7528\u7684\u53d1\u5c55\uff0c\u9ad8\u5e76\u53d1\u8bbf\u95ee\u6210\u4e3a\u4e86\u4e92\u8054\u7f51\u516c\u53f8\u6781\u4e3a\u91cd\u8981\u7684\u95ee\u9898\u3002\u4e3a\u4e86\u4fdd\u8bc1\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\uff0c\u6211\u4eec\u9700\u8981\u5bf9\u8bbf\u95ee\u8fdb\u884c\u9650\u5236\uff0c\u9632\u6b62\u6076\u610f\u653b\u51fb\u6216\u8005\u8fc7\u5ea6\u8bbf\u95ee\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002\u9650\u6d41\u673a\u5236\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4e92\u8054\u7f51\u5e94\u7528\u4e2d\uff0c\u5176\u4e2dRedis\u4f5c\u4e3a\u4e00\u4e2a\u6d41\u884c\u7684\u7f13\u5b58\u6570\u636e\u5e93\uff0c\u4e5f\u63d0\u4f9b\u4e86\u5206\u5e03\u5f0f\u9650\u6d41\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n

Redis\u7684\u9650\u6d41\u673a\u5236\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e24\u79cd\u5b9e\u73b0\u65b9\u6cd5\uff1a<\/p>\n

1.\u57fa\u4e8e\u4ee4\u724c\u6876\u7b97\u6cd5\u7684\u9650\u6d41<\/p>\n

\u4ee4\u724c\u6876\u7b97\u6cd5\u662f\u4e92\u8054\u7f51\u5e38\u7528\u7684\u9650\u6d41\u7b97\u6cd5\u4e4b\u4e00\uff0cRedis\u63d0\u4f9b\u4e86\u57fa\u4e8e\u4ee4\u724c\u6876\u7b97\u6cd5\u7684\u9650\u6d41\u65b9\u6848\u3002\u8fd9\u79cd\u65b9\u6848\u7684\u5b9e\u73b0\u4e3b\u8981\u57fa\u4e8eRedis\u7684\u6709\u5e8f\u96c6\u5408(zset)\u548cLua\u811a\u672c\u3002<\/p>\n

\u4ee4\u724c\u6876\u7b97\u6cd5\u7684\u539f\u7406\u662f\u4e00\u4e2a\u56fa\u5b9a\u5bb9\u91cf\u7684\u6876\uff0c\u6309\u7167\u4e00\u5b9a\u7684\u901f\u7387\u5411\u5176\u4e2d\u653e\u5165\u4ee4\u724c\uff0c\u6bcf\u4e2a\u8bf7\u6c42\u9700\u8981\u5148\u4ece\u6876\u4e2d\u83b7\u53d6\u4e00\u4e2a\u4ee4\u724c\u624d\u80fd\u88ab\u5904\u7406\u3002\u5982\u679c\u6876\u4e2d\u6ca1\u6709\u4ee4\u724c\uff0c\u5219\u8fd9\u4e2a\u8bf7\u6c42\u88ab\u62d2\u7edd\u3002<\/p>\n

\u5728Redis\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6709\u5e8f\u96c6\u5408(zset)\u6765\u6784\u5efa\u4ee4\u724c\u6876\u3002\u6709\u5e8f\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8868\u793a\u4e00\u4e2a\u4ee4\u724c\uff0c\u5b83\u7684score\u4ee3\u8868\u8be5\u4ee4\u724c\u7684\u5230\u8fbe\u65f6\u95f4\uff0cvalue\u53ef\u4ee5\u662f\u4efb\u610f\u503c\u3002Lua\u811a\u672c\u5219\u7528\u4e8e\u5b9e\u73b0\u83b7\u53d6\u4ee4\u724c\u7684\u64cd\u4f5c\u3002\u5177\u4f53\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

-- \u83b7\u53d6\u4ee4\u724c\nlocal function acquire_token(key, rate, capacity, now)\n  local current_capacity = redis.call(\"zcount\", key, \"-inf\", \"+inf\")\n  local delta_time = 1000 \/ rate\n  local expected_token = math.floor((now - delta_time * capacity) \/ delta_time)\n  local available_token = math.min(expected_token - current_capacity, capacity)\n  if available_token > 0 then\n    local members = {}\n    for i = 1, available_token do\n      members[i] = now\n    end\n    redis.call(\"zadd\", key, unpack(members))\n  end\n\n  local current_time = now\n  local stop_time = current_time + 1000\n  local expire_time = stop_time - delta_time * (available_token - 1)\n  local result = redis.call(\"zrangebyscore\", key, \"-inf\", expire_time)\n  if #result > 0 then\n    redis.call(\"zrem\", key, unpack(result))\n    return 1\n  end\n\n  return 0\nend\n\n-- \u8c03\u7528\u83b7\u53d6\u4ee4\u724c\u64cd\u4f5c\nlocal result = acquire_token(KEYS[1], ARGV[1], ARGV[2], ARGV[3])\nreturn result<\/pre>\n
\u5176\u4e2d\uff0cKEYS[1]\u4ee3\u8868\u9650\u6d41\u7684Key\uff0cARGV[1]\u4ee3\u8868\u4ee4\u724c\u653e\u5165\u7684\u901f\u7387\uff0cARGV[2]\u4ee3\u8868\u6876\u7684\u5bb9\u91cf\uff0cARGV[3]\u4ee3\u8868\u5f53\u524d\u65f6\u95f4\u3002<\/p>\n
2.\u57fa\u4e8e\u6f0f\u6597\u7b97\u6cd5\u7684\u9650\u6d41<\/p>\n
\u6f0f\u6597\u7b97\u6cd5\u4e5f\u662f\u4e00\u79cd\u5e38\u7528\u7684\u9650\u6d41\u7b97\u6cd5\uff0c\u5b83\u7684\u539f\u7406\u662f\u4e00\u4e2a\u6f0f\u6597\uff0c\u8bf7\u6c42\u50cf\u6c34\u4e00\u6837\u6d41\u5165\u6f0f\u6597\uff0c\u5982\u679c\u6f0f\u6597\u88ab\u5360\u6ee1\u4e86\uff0c\u5c31\u4f1a\u6ea2\u51fa\u3002\u5728Redis\u4e2d\uff0c\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u4f7f\u7528\u6709\u5e8f\u96c6\u5408(zset)\u548cLua\u811a\u672c\u6765\u5b9e\u73b0\u6f0f\u6597\u7b97\u6cd5\u3002<\/p>\n
\u6f0f\u6597\u7b97\u6cd5\u9700\u8981\u7ef4\u62a4\u4e00\u4e2a\u6f0f\u6597\u5bf9\u8c61\uff0c\u8bb0\u5f55\u4e0a\u4e00\u6b21\u8bf7\u6c42\u7684\u65f6\u95f4\u548c\u6876\u7684\u5f53\u524d\u5bb9\u91cf\u3002\u5f53\u6709\u65b0\u8bf7\u6c42\u6765\u4e34\u65f6\uff0c\u7b97\u6cd5\u4f1a\u6839\u636e\u5f53\u524d\u65f6\u95f4\u4e0e\u4e0a\u4e00\u6b21\u8bf7\u6c42\u65f6\u95f4\u7684\u5dee\u503c\uff0c\u8ba1\u7b97\u51fa\u6f0f\u6597\u7684\u5bb9\u91cf\u589e\u52a0\u91cf\u3002\u5982\u679c\u5bb9\u91cf\u5c0f\u4e8e\u6876\u7684\u6700\u5927\u5bb9\u91cf\uff0c\u5219\u5141\u8bb8\u8be5\u8bf7\u6c42\u901a\u8fc7\uff0c\u5c06\u5bb9\u91cf\u51cf\u5c11\uff1b\u5426\u5219\uff0c\u8be5\u8bf7\u6c42\u88ab\u62d2\u7edd\u3002<\/p>\n
\u5177\u4f53\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
-- \u83b7\u53d6\u4ee4\u724c\nlocal function acquire_token(key, rate, capacity, now)\n  local current_capacity = redis.call(\"hget\", key, \"capacity\")\n  local last_time = redis.call(\"hget\", key, \"last_time\")\n\n  if current_capacity == redis.error_reply or current_capacity == ngx.null then\n    current_capacity = capacity\n    redis.call(\"hset\", key, \"capacity\", current_capacity)\n  else\n    current_capacity = tonumber(current_capacity)\n  end\n\n  if last_time == redis.error_reply or last_time == ngx.null then\n    last_time = now\n    redis.call(\"hset\", key, \"last_time\", last_time)\n  else\n    last_time = tonumber(last_time)\n  end\n\n  local delta_time = now - last_time\n  local expected_capacity = delta_time * rate \/ 1000 + current_capacity\n  local actual_capacity = math.min(expected_capacity, capacity)\n\n  if actual_capacity >= 1 then\n    redis.call(\"hset\", key, \"capacity\", actual_capacity - 1)\n    redis.call(\"hset\", key, \"last_time\", now)\n    return 1\n  end\n\n  return 0\nend\n\n-- \u8c03\u7528\u83b7\u53d6\u4ee4\u724c\u64cd\u4f5c\nlocal result = acquire_token(KEYS[1], ARGV[1], ARGV[2], ARGV[3])\nreturn result<\/pre>\n
\u5176\u4e2d\uff0cKEYS[1]\u4ee3\u8868\u9650\u6d41\u7684Key\uff0cARGV[1]\u4ee3\u8868\u6f0f\u6597\u7684\u52a0\u6c34\u901f\u7387\uff0cARGV[2]\u4ee3\u8868\u6f0f\u6597\u7684\u5bb9\u91cf\uff0cARGV[3]\u4ee3\u8868\u5f53\u524d\u65f6\u95f4\u3002<\/p>\n
\u603b\u7ed3<\/p>\n
Redis\u63d0\u4f9b\u7684\u5206\u5e03\u5f0f\u9650\u6d41\u673a\u5236\u53ef\u4ee5\u6709\u6548\u5730\u63a7\u5236\u5e76\u53d1\u8bbf\u95ee\uff0c\u4fdd\u969c\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u3002\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u9009\u62e9\u4ee4\u724c\u6876\u7b97\u6cd5\u6216\u6f0f\u6597\u7b97\u6cd5\u4f5c\u4e3a\u9650\u6d41\u7b97\u6cd5\uff0c\u5e76\u901a\u8fc7Redis\u7684\u6709\u5e8f\u96c6\u5408(zset)\u548cLua\u811a\u672c\u6765\u5b9e\u73b0\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u5e94\u7528\u9650\u6d41\u673a\u5236\u65f6\uff0c\u5e94\u8be5\u7ed3\u5408\u5177\u4f53\u4e1a\u52a1\u573a\u666f\u548c\u6d41\u91cf\u7279\u70b9\uff0c\u5408\u7406\u914d\u7f6e\u7b97\u6cd5\u53c2\u6570\uff0c\u907f\u514d\u5bf9\u7528\u6237\u4f53\u9a8c\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002<\/p>\n
\n
\n <\/dt>\n
\n   Redis\u548cMongoDB\u7684\u533a\u522b\u4e0e\u4f7f\u7528\u573a\u666f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   49% \u53d7\u8bbf\u8005\u62c5\u5fc3\u88ab AI\u201c\u62a2\u996d\u7897\u201d\uff0c\u5fae\u8f6f\u516c\u5e03 2023 \u5e74\u5de5\u4f5c\u8d8b\u52bf\u6307\u6570\u62a5\u544a\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
Redis\u7684\u5206\u5e03\u5f0f\u9650\u6d41\u673a\u5236\u5b9e\u73b0\u65b9...<\/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-201724","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201724","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=201724"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201724\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}