{"id":201506,"date":"2025-05-10T11:25:14","date_gmt":"2025-05-10T03:25:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201506\/"},"modified":"2025-05-10T11:25:14","modified_gmt":"2025-05-10T03:25:14","slug":"%e8%81%8a%e4%b8%80%e8%81%8aredis%e5%a5%87%e8%91%a9%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e4%b8%8e%e9%9b%86%e7%be%a4%e7%9f%a5%e8%af%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201506\/","title":{"rendered":"\u804a\u4e00\u804aredis\u5947\u8469\u6570\u636e\u7c7b\u578b\u4e0e\u96c6\u7fa4\u77e5\u8bc6"},"content":{"rendered":"

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

\u804a\u4e00\u804aredis\u5947\u8469\u6570\u636e\u7c7b\u578b\u4e0e\u96c6\u7fa4\u77e5\u8bc6<\/h1>\n

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

\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u804a\u4e00\u804aredis\u5947\u8469\u6570\u636e\u7c7b\u578b\u4e0e\u96c6\u7fa4\u77e5\u8bc6\u300b\uff0c\u6d89\u53ca\u5230\u6570\u636e\u7c7b\u578b\u3001redis\u96c6\u7fa4\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n

\u591a\u6837\u7684\u6570\u636e\u7c7b\u578b<\/h2>\n

string <\/span>\u7c7b\u578b\u7b80\u5355\u65b9\u4fbf\uff0c\u652f\u6301\u7a7a\u95f4\u9884\u5206\u914d\uff0c\u4e5f\u5c31\u662f\u6bcf\u6b21\u4f1a\u591a\u5206\u914d\u70b9\u7a7a\u95f4\uff0c\u8fd9\u6837 string \u5982\u679c\u4e0b\u6b21\u53d8\u957f\u7684\u8bdd\uff0c\u5c31\u4e0d\u9700\u8981\u989d\u5916\u7684\u7533\u8bf7\u7a7a\u4e86\uff0c\u5f53\u7136\u524d\u63d0\u662f\u5269\u4f59\u7684\u7a7a\u95f4\u591f\u7528\u3002<\/p>\n

List <\/span>\u7c7b\u578b\u53ef\u4ee5\u5b9e\u73b0\u7b80\u5355\u7684\u6d88\u606f\u961f\u5217\uff0c\u4f46\u662f\u6ce8\u610f\u53ef\u80fd\u5b58\u5728\u6d88\u606f\u4e22\u5931\u54e6\uff0c\u5b83\u5e76\u4e0d\u6301 ACK \u6a21\u5f0f\u3002<\/p>\n

Hash<\/span> \u8868\u6709\u70b9\u50cf\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u4f46\u662f\u5f53 hash \u8868\u8d8a\u6765\u8d8a\u5927\u7684\u65f6\u5019\uff0c\u8bf7\u6ce8\u610f\uff0c\u907f\u514d\u4f7f\u7528 hgetall \u4e4b\u7c7b\u7684\u8bed\u53e5\uff0c\u56e0\u4e3a\u8bf7\u6c42\u5927\u91cf\u7684\u6570\u636e\u4f1a\u5bfc\u81f4redis\u963b\u585e\uff0c\u8fd9\u6837\u540e\u9762\u7684\u5144\u5f1f\u4eec\u5c31\u5f97\u7b49\u5f85\u4e86\u3002<\/p>\n

set <\/span>\u96c6\u5408\u7c7b\u578b\u53ef\u4ee5\u5e2e\u4f60\u505a\u4e00\u4e9b\u7edf\u8ba1\uff0c\u6bd4\u5982\u4f60\u8981\u7edf\u8ba1\u67d0\u5929\u6d3b\u8dc3\u7684\u7528\u6237\uff0c\u53ef\u4ee5\u76f4\u63a5\u628a\u7528\u6237ID\u6254\u5230\u96c6\u5408\u91cc\uff0c\u96c6\u5408\u652f\u6301\u4e00\u4e9b\u9a9a\u64cd\u4f5c\uff0c\u6bd4\u5982 sdiff \u53ef\u4ee5\u83b7\u53d6\u96c6\u5408\u4e4b\u95f4\u7684\u5dee\u96c6\uff0csunion \u53ef\u4ee5\u83b7\u53d6\u96c6\u5408\u4e4b\u95f4\u7684\u5e76\u96c6\uff0c\u529f\u80fd\u5f88\u591a\uff0c\u4f46\u662f\u4e00\u5b9a\u9700\u8981\u8c28\u614e\uff0c\u56e0\u4e3a\u725b\u903c\u7684\u529f\u80fd\u662f\u6709\u4ee3\u4ef7\u7684\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u9700\u8981\u8017\u8d39\u4e00\u4e9b CPU \u548cIO \u8d44\u6e90\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u963b\u585e\uff0c\u56e0\u6b64\u5927\u96c6\u5408\u4e4b\u95f4\u7684\u9a9a\u64cd\u4f5c\u8981\u614e\u7528\uff0c<\/p>\n

zset <\/span>\u53ef\u4ee5\u8bf4\u662f\u6700\u95ea\u8000\u7684\u661f\uff0c\u53ef\u4ee5\u505a\u6392\u5e8f\uff0c\u56e0\u4e3a\u53ef\u4ee5\u6392\u5e8f\uff0c\u56e0\u6b64\u5e94\u7528\u573a\u666f\u633a\u591a\uff0c\u6bd4\u5982\u70b9\u8d5e\u524dxx\u540d\u7528\u6237\uff0c\u5ef6\u65f6\u961f\u5217\u7b49\u7b49\u3002<\/p>\n

bitmap <\/span>\u4f4d\u56fe\u7684\u597d\u5904\u5c31\u662f\u5728\u4e8e\u8282\u7701\u7a7a\u95f4\uff0c\u7279\u522b\u5728\u505a\u4e00\u4e9b\u7edf\u8ba1\u7c7b\u7684\u65b9\u9762\uff0c\u6bd4\u5982\u8981\u7edf\u8ba1\u67d0\u4e00\u5929\u6709\u591a\u5c11\u4e2a\u7528\u6237\u7b7e\u5230\u4e86\u5e76\u4e14\u67d0\u4e2a\u7528\u6237\u662f\u5426\u7b7e\u5230\u4e86\uff0c\u5982\u679c\u4e0d\u7528bitmap\u7684\u8bdd\uff0c\u4f60\u53ef\u80fd\u4f1a\u60f3\u5230\u7528set\u3002<\/p>\n

SADD day 1234\/\/\u7b7e\u5230\u5c31\u6dfb\u52a0\u5230\u96c6\u5408\nSISMEMBER day 1234\/\/\u5224\u65ad1234\u662f\u5426\u7b7e\u5230\nSCARD day   \/\/\u6709\u591a\u5c11\u4e2a\u7b7e\u5230\u7684\n<\/pre>\n
set \u5728\u529f\u80fd\u4e0a\u53ef\u4ee5\u6ee1\u8db3\uff0c\u4f46\u662f\u76f8\u6bd4bitmap\u7684\u8bdd\uff0cset\u8981\u66f4\u8017\u8d39\u5b58\u50a8\u7a7a\u95f4\uff0cset\u7684\u5e95\u5c42\u4e3b\u8981\u662f\u7531\u6574\u6570\u96c6\u5408\u6216\u8005 hashtable \u7ec4\u6210\uff0c\u6574\u6570\u96c6\u5408\u53ea\u6709\u5728\u6570\u636e\u91cf\u975e\u5e38\u5c0f\u7684\u60c5\u51b5\u4e0b\u624d\u4f1a\u4f7f\u7528\uff0c\u4e00\u822c\u662f\u5c0f\u4e8e512\u4e2a\u5143\u7d20\uff0c\u540c\u65f6\u5143\u7d20\u5fc5\u987b\u90fd\u662f\u6574\u6570\uff0c\u5bf9\u4e8eset\u6765\u8bf4\uff0c\u6574\u6570\u96c6\u5408\u7684\u6570\u636e\u66f4\u52a0\u7d27\u51d1\uff0c\u4ed6\u4eec\u5728\u5185\u5b58\u662f\u4e0a\u8fde\u7eed\u7684\uff0c\u67e5\u8be2\u7684\u8bdd\u53ea\u80fd\u662f\u4e8c\u5206\u67e5\u627e\u4e86\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(logN)\uff0c\u800c hashtable \u5c31\u4e0d\u540c\u4e86\uff0c\u8fd9\u91cc\u7684 hashtable \u548c redis \u76845\u5927\u6570\u636e\u7c7b\u578b\u4e2d\u7684hash\u662f\u4e00\u6837\u7684\uff0c\u53ea\u4e0d\u8fc7\u6ca1\u6709 value \u800c\u5df2\uff0cvalue \u6307\u5411\u4e2a null\uff0c\u540c\u65f6\u4e5f\u4e0d\u5b58\u5728\u51b2\u7a81\uff0c\u56e0\u4e3a\u8fd9\u91cc\u662f\u96c6\u5408\uff0c\u4f46\u662f\u9700\u8981\u8003\u8651 rehash \u76f8\u5173\u95ee\u9898\u3002ok\uff0c\u626f\u7684\u6709\u70b9\u8fdc\uff0c\u6211\u4eec\u8bf4\u7684\u7528\u6237\u7b7e\u5230\u95ee\u9898\uff0c\u5728\u7528\u6237\u975e\u5e38\u591a\u7684\u60c5\u51b5\u4e0b\uff0cset \u7684\u8bdd\u80af\u5b9a\u4f1a\u7528\u5230 hashtable\uff0chashtable \u7684\u8bdd\uff0c\u5176\u5b9e\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e2a dictEntry \u7ed3\u6784\u4f53<\/p>\n
typedef struct dictEntry {\n    \/\/ \u952e\n    void *key;\n    \/\/ \u503c\n    union {\n        void *val;\n        uint64_t u64;\n        int64_t s64;\n    } v;\n    \/\/ \u6307\u5411\u4e0b\u4e2a\u54c8\u5e0c\u8868\u8282\u70b9\uff0c\u5f62\u6210\u94fe\u8868\n    struct dictEntry *next;\n\u200b\u200b\u200b\u200b\u200b\u200b\u200b} dictEntry;\n<\/pre>\n
\u4ece\u8fd9\u4e2a\u7ed3\u6784\u4f53\u53ef\u4ee5\u770b\u5230\u4ec0\u4e48\u5462\uff1f\u9996\u5148\u867d\u7136\u503c union\uff08\u6ca1\u6709 value\uff09\u548c next\uff08\u6ca1\u6709\u51b2\u7a81\uff09\u662f\u7a7a\u7684\uff0c\u4f46\u662f\u7ed3\u6784\u4f53\u672c\u8eab\u9700\u8981\u7a7a\u95f4\uff0c\u8fd8\u9700\u8981\u52a0\u4e0a\u4e2a key\uff0c\u8fd9\u4e2a\u5360\u7528\u7a7a\u95f4\u662f\u5b9e\u6253\u5b9e\u7684\uff0c\u800c\u5982\u679c\u7528 bitmap \u7684\u8bdd\uff0c\u4e00\u4e2abit\u4f4d\u5c31\u53ef\u4ee5\u4ee3\u8868\u4e00\u4e2a\u6570\u5b57\uff0c\u5f88\u7701\u7a7a\u95f4\uff0c\u6211\u4eec\u6765\u770b\u770b bitmap \u7684\u65b9\u5f0f\u5982\u4f55\u8bbe\u7f6e\u548c\u7edf\u8ba1\u3002<\/p>\n
SETBIT day 1234 1\/\/\u7b7e\u5230\nGETBIT day 1234\/\/\u5224\u65ad1234\u662f\u5426\u7b7e\u5230\nBITCOUNT day\/\/\u6709\u591a\u5c11\u4e2a\u7b7e\u5230\u7684\n<\/pre>\n
bf <\/span>\u8fd9\u662f redis4.0 \u4e4b\u540e\u652f\u6301\u7684\u5e03\u9686\u8fc7\u6ee4\u5668 RedisBloom\uff0c\u4f46\u662f\u9700\u8981\u5355\u72ec\u52a0\u8f7d\u5bf9\u5e94\u7684 module\uff0c\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u57fa\u4e8e\u4e0a\u8ff0\u7684 bitmap \u6765\u5b9e\u73b0\u81ea\u5df1\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u4e0d\u8fc7\u65e2\u7136 redis \u5df2\u7ecf\u652f\u6301\u4e86\uff0c\u901a\u8fc7 RedisBloom \u53ef\u4ee5\u51cf\u5c11\u6211\u4eec\u7684\u5f00\u53d1\u65f6\u95f4\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u5e72\u561b\u7684\uff0c\u6211\u8fd9\u91cc\u5c31\u4e0d\u8d58\u8ff0\u4e86\uff0c\u76f4\u63a5\u6765\u770b\u770b RedisBloom \u76f8\u5173\u7684\u7528\u6cd5\u5427\u3002<\/p>\n
# \u53ef\u4ee5\u901a\u8fc7docker\u7684\u65b9\u5f0f\u5feb\u901f\u62c9\u53d6\u955c\u50cf\u6765\u73a9\u800d\ndocker run -p 6379:6379 --name redis-redisbloom redislabs\/rebloom:latest\ndocker exec -it redis-redisbloom bash\nredis-cli\n# \u76f8\u5173\u64cd\u4f5c\nbf.reserve sign 0.001 10000\nbf.add sign 99 \/\/99\u8fd9\u4e2a\u7528\u6237\u52a0\u5165\nbf.add exists 99\/\/\u5224\u65ad99\u8fd9\u4e2a\u7528\u6237\u662f\u5426\u5b58\u5728\n<\/pre>\n
\u56e0\u4e3a\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u5b58\u5728\u8bef\u5224\u7684\uff0c\u6240\u6709 bf \u652f\u6301\u81ea\u5b9a\u4e49\u8bef\u5224\u7387\uff0c0.001\u5c31\u4ee3\u8868\u8bef\u5224\u7387\uff0c10000 \u4ee3\u8868\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u5b58\u50a8\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u5f53\u5b9e\u9645\u5b58\u50a8\u7684\u5143\u7d20\u4e2a\u6570\u8d85\u8fc7\u8fd9\u4e2a\u503c\u7684\u65f6\u5019\uff0c\u8bef\u5224\u7387\u4f1a\u63d0\u9ad8\u3002<\/p>\n
HyperLogLog <\/span>\u53ef\u4ee5\u7528\u4e8e\u7edf\u8ba1\uff0c\u5b83\u7684\u4f18\u70b9\u5c31\u662f\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u6781\u5c0f\uff0c\u53ea\u9700\u8981 12KB \u7684\u5185\u5b58\u5c31\u53ef\u4ee5\u7edf\u8ba1 2^64 \u4e2a\u5143\u7d20\uff0c\u90a3\u5b83\u4e3b\u8981\u7edf\u8ba1\u4ec0\u4e48\u5462\uff1f\u5176\u5b9e\u4e3b\u8981\u5c31\u662f\u57fa\u6570\u7edf\u8ba1\uff0c\u6bd4\u5982\u50cf UV \u8fd9\u79cd\uff0c\u4ece\u529f\u80fd\u4e0a\u6765\u8bf4 UV \u53ef\u4ee5\u7528 set \u6216\u8005 hash \u6765\u5b58\u50a8\uff0c\u4f46\u662f\u7f3a\u70b9\u5c31\u662f\u8017\u8d39\u5b58\u50a8\uff0c\u5bb9\u6613\u4f7f\u4e4b\u53d8\u6210\u5927 key\uff0c\u5982\u679c\u60f3\u8981\u8282\u7701\u7a7a\u95f4\uff0cbitmap \u4e5f\u53ef\u4ee5\uff0c12KB \u7a7a\u95f4\u7684 bitmap \u53ea\u80fd\u7edf\u8ba1 12*1024*8=98304\u4e2a\u5143\u7d20\uff0c\u800c HyperLogLog \u5374\u53ef\u4ee5\u7edf\u8ba1 2^64 \u4e2a\u5143\u7d20\uff0c\u4f46\u662f\u8fd9\u4e48\u725b\u903c\u7684\u6280\u672f\u5176\u5b9e\u662f\u6709\u8bef\u5dee\u7684\uff0cHyperLogLog \u662f\u57fa\u4e8e\u6982\u7387\u6765\u7edf\u8ba1\u7684\uff0c\u6807\u51c6\u8bef\u7b97\u7387\u662f 0.81%\uff0c\u5728\u7edf\u8ba1\u6d77\u91cf\u6570\u636e\u5e76\u4e14\u5bf9\u7cbe\u5ea6\u8981\u6c42\u4e0d\u90a3\u4e48\u9ad8\u7684\u573a\u666f\u4e0b\uff0cHyperLogLog \u5728\u8282\u7701\u7a7a\u95f4\u8fd9\u5757\u8fd8\u662f\u5f88\u4f18\u79c0\u7684\u3002<\/p>\n
PFADD uv 1 2 3 \/\/1 2 3\u662f\u6d3b\u8dc3\u7528\u6237\nPFCOUNT uv \/\/\u7edf\u8ba1\n<\/pre>\n
GEO <\/span>\u662f\u53ef\u4ee5\u5e94\u7528\u5728\u5730\u7406\u4f4d\u7f6e\u7684\u4e1a\u52a1\u4e0a\uff0c\u6bd4\u5982\u5fae\u4fe1\u9644\u8fd1\u7684\u4eba\u6216\u8005\u9644\u8fd1\u7684\u8f66\u8f86\u7b49\u7b49\uff0c\u5148\u6765\u770b\u4e00\u4e0b\u5982\u679c\u6ca1\u6709GEO \u8fd9\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u4f60\u5982\u4f55\u77e5\u9053\u4f60\u9644\u8fd1\u7684\u4eba\uff1f\u9996\u5148\u5f97\u4e0a\u62a5\u81ea\u5df1\u7684\u5730\u7406\u4f4d\u7f6e\u4fe1\u606f\u5427\uff0c\u6bd4\u5982\u7ecf\u5ea6 116.397128\uff0c\u7eac\u5ea6 39.916527\uff0c\u6b64\u65f6\u53ef\u4ee5\u7528 string\u3001hash \u6570\u636e\u7c7b\u578b\u5b58\u50a8\uff0c\u4f46\u662f\u5982\u679c\u8981\u67e5\u627e\u4f60\u9644\u8fd1\u7684\u4eba\uff0cstring \u548c hash \u8fd9\u79cd\u5c31\u65e0\u80fd\u4e3a\u4f8b\u4e86\uff0c\u4f60\u4e0d\u53ef\u80fd\u6bcf\u6b21\u90fd\u8981\u904d\u5386\u5168\u90e8\u7684\u6570\u636e\u6765\u5224\u65ad\uff0c\u8fd9\u6837\u592a\u8017\u65f6\u4e86\uff0c\u5f53\u7136\u4f60\u4e5f\u4e0d\u53ef\u80fd\u901a\u8fc7 zset \u8fd9\u79cd\u6570\u636e\u7ed3\u6784\u6765\u628a\u7ecf\u7eac\u5ea6\u4fe1\u606f\u5f53\u6210\u6743\u91cd\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u80fd\u628a\u7ecf\u7eac\u5ea6\u4fe1\u606f\u901a\u8fc7\u67d0\u79cd\u65b9\u5f0f\u8f6c\u6362\u6210\u4e00\u4e2a\u6570\u5b57\uff0c\u7136\u540e\u5f53\u6210\u6743\u91cd\u597d\u50cf\u4e5f\u53ef\u4ee5\uff0c\u8fd9\u65f6\u6211\u4eec\u53ea\u9700\u901a\u8fc7zrangebyscore key v1 v2\u4e5f\u53ef\u4ee5\u627e\u5230\u9644\u8fd1\u7684\u4eba\u3002\u771f\u7684\u9700\u8981\u8fd9\u4e48\u9ebb\u70e6\u5417\uff1f\u4e8e\u662f GEO \u51fa\u73b0\u4e86\uff0cGEO \u8f6c\u6362\u7ecf\u7eac\u5ea6\u4e3a\u6570\u5b57\u7684\u65b9\u6cd5\u662f\u201c\u4e8c\u5206\u533a\u95f4\uff0c\u533a\u95f4\u7f16\u7801\u201d\uff0c\u8fd9\u662f\u4ec0\u4e48\u610f\u601d\u5462\uff1f\u4ee5\u7ecf\u5ea6\u4e3a\u4f8b\uff0c\u5b83\u7684\u8303\u56f4\u662f[-180,180]\uff0c\u5982\u679c\u8981\u91c7\u75283\u4f4d\u7f16\u7801\u503c\uff0c\u90a3\u4e48\u5c31\u662f\u9700\u8981\u4e8c\u52063\u6b21\uff0c\u4e8c\u5206\u540e\u843d\u5728\u5de6\u8fb9\u7684\u75280\u8868\u793a\uff0c\u53f3\u8fb9\u7684\u75281\u8868\u793a\uff0c\u4ee5\u7ecf\u5ea6\u662f121.48941 \u6765\u8bf4\uff0c\u7b2c\u4e00\u6b21\u662f\u5728[0,180]\u8fd9\u4e2a\u533a\u95f4\uff0c\u56e0\u6b64\u8bb01\uff0c\u7b2c\u4e8c\u6b21\u662f\u5728[90,180]\uff0c\u56e0\u6b64\u518d\u8bb01\uff0c\u7b2c\u4e09\u6b21\u662f\u5728[90,135]\uff0c\u56e0\u6b64\u8bb00\u3002\u7eac\u5ea6\u4e5f\u662f\u540c\u6837\u7684\u903b\u8f91\uff0c\u5047\u8bbe\u6b64\u65f6\u5bf9\u5e94\u7684\u7eac\u5ea6\u7f16\u7801\u540e\u662f010\uff0c\u6700\u540e\u628a\u7ecf\u7eac\u5ea6\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u7ecf\u5ea6\u7684\u6bcf\u4e2a\u503c\u5728\u5076\u6570\u4f4d\uff0c\u7eac\u5ea6\u7684\u6bcf\u4e2a\u503c\u5728\u5947\u6570\u4f4d\u3002<\/p>\n
1 1 0   \/\/\u7ecf\u5ea6\n 0 1 0  \/\/\u7eac\u5ea6\n------------\n101100 \/\/\u7ecf\u7eac\u5ea6\u5bf9\u5e94\u7684\u6570\u503c\n<\/pre>\n
\u539f\u7406\u662f\u8fd9\u6837\uff0c\u6211\u4eec\u518d\u6765\u770b\u770b redis \u5982\u4f55\u4f7f\u7528 GEO\uff1a<\/p>\n
GEOADD location 112.123456 41.112345 99 \/\/\u4e0a\u62a5\u7528\u623799\u7684\u5730\u7406\u4f4d\u7f6e\u4fe1\u606f\nGEORADIUS location  112.123456 41.112345 1 km ASC COUNT 10 \/\/\u83b7\u53d6\u9644\u8fd11KM\u7684\u4eba\n<\/pre>\n
\u641e\u61c2\u96c6\u7fa4<\/h2>\n
\u751f\u4ea7\u73af\u5883\u7528\u5355\u5b9e\u4f8b redis \u7684\u5e94\u8be5\u6bd4\u8f83\u5c11\uff0c\u5355\u5b9e\u4f8b\u7684\u98ce\u9669\u5728\u4e8e\uff1a<\/p>\n
    \n
  1. \u5355\u70b9\u6545\u969c\u5373\u670d\u52a1\u6545\u969c\uff0c\u6ca1\u6709backup<\/li>\n
  2. \u5355\u5b9e\u4f8b\u538b\u529b\u5927\uff0c\u53c8\u8981\u63d0\u4f9b\u8bfb\uff0c\u53c8\u8981\u63d0\u4f9b\u5199<\/li>\n<\/ol>\n
    \u4e8e\u662f\u6211\u4eec\u9996\u5148\u60f3\u5230\u7684\u5c31\u662f\u7ecf\u5178\u7684\u4e3b\u4ece\u6a21\u5f0f\uff0c\u800c\u4e14\u5f80\u5f80\u662f\u4e00\u4e3b\u591a\u4ece\uff0c\u8fd9\u662f\u56e0\u4e3a\u5927\u90e8\u5206\u5e94\u7528\u90fd\u662f\u8bfb\u591a\u5199\u5c11\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u7684\u4e3b\u8d1f\u8d23\u66f4\u65b0\uff0c\u4ece\u8d1f\u8d23\u63d0\u4f9b\u8bfb\uff0c\u5c31\u7b97\u6211\u4eec\u7684\u4e3b\u5b95\u673a\u4e86\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u9009\u62e9\u4e00\u4e2a\u4ece\u6765\u5145\u5f53\u4e3b\uff0c\u8fd9\u6837\u6574\u4e2a\u5e94\u7528\u4f9d\u7136\u53ef\u4ee5\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n
    \u590d\u5236\u8fc7\u7a0b\u7684\u7ec6\u8282<\/h3>\n
    \u5f53\u4e00\u4e2a redis \u5b9e\u4f8b\u9996\u6b21\u6210\u4e3a\u67d0\u4e2a\u4e3b\u7684\u4ece\u7684\u65f6\u5019\uff0c\u8fd9\u65f6\u4e3b\u5f97\u628a\u6570\u636e\u53d1\u7ed9\u5b83\uff0c\u4e5f\u5c31\u662f rdb \u6587\u4ef6\uff0c\u8fd9\u4e2a\u8fc7\u7a0b master \u662f\u8981 fork \u4e00\u4e2a\u5b50\u8fdb\u7a0b\u6765\u5904\u7406\u7684\uff0c\u8fd9\u4e2a\u5b50\u8fdb\u7a0b\u4f1a\u6267\u884c bgsave \u628a\u5f53\u524d\u7684\u6570\u636e\u91cd\u65b0\u4fdd\u5b58\u4e00\u4e0b\uff0c\u7136\u540e\u51c6\u5907\u53d1\u7ed9\u65b0\u6765\u7684\u4ece\uff0cbgsave \u7684\u672c\u8d28\u662f\u8bfb\u53d6\u5f53\u524d\u5185\u5b58\u4e2d\u7684\u6570\u636e\u7136\u540e\u4fdd\u5b58\u5230 rdb \u6587\u4ef6\u4e2d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u5927\u91cf\u7684 IO\uff0c\u5982\u679c\u76f4\u63a5\u5728\u4e3b\u8fdb\u7a0b\u4e2d\u6765\u5904\u7406\u7684\u8bdd\uff0c\u5927\u6982\u7387\u4f1a\u963b\u585e\u6b63\u5e38\u7684\u8bf7\u6c42\uff0c\u56e0\u6b64\u4f7f\u7528\u4e2a\u5b50\u8fdb\u7a0b\u662f\u4e2a\u660e\u667a\u7684\u9009\u62e9\u3002<\/p>\n
    \u90a3 fork \u7684\u5b50\u8fdb\u7a0b\u5728 bgsave \u8fc7\u7a0b\u4e2d\u5982\u679c\u6709\u65b0\u7684\u53d8\u66f4\u8bf7\u6c42\u4f1a\u600e\u4e48\u529e\uff1f<\/strong><\/p>\n
    \u4e25\u683c\u6765\u8bf4\u5b50\u8fdb\u7a0b\u51fa\u6765\u7684\u4e00\u77ac\u95f4\uff0c\u8981\u4fdd\u5b58\u7684\u6570\u636e\u5e94\u8be5\u5c31\u662f\u5f53\u65f6\u90a3\u4e2a\u70b9\u7684\u5feb\u7167\u6570\u636e\uff0c\u6240\u4ee5\u662f\u76f4\u63a5\u628a\u5f53\u65f6\u7684\u5185\u5b58\u518d\u590d\u5236\u4e00\u4efd\u5417\uff1f\u4e0d\u590d\u5236\u7684\u8bdd\uff0c\u5982\u679c\u8fd9\u671f\u95f4\u53c8\u6709\u53d8\u66f4\u6539\u600e\u4e48\u529e\uff1f\u5176\u5b9e\u8fd9\u8981\u8bf4\u5230\u5199\u5b9e\u590d\u5236\uff08COW\uff09\u673a\u5236\uff0c\u9996\u5148\u4ece\u8868\u8c61\u4e0a\u6765\u770b\u5185\u5b58\u662f\u4e00\u6574\u5757\u7a7a\u95f4\uff0c\u5176\u5b9e\u8fd9\u4e0d\u592a\u597d\u7ef4\u62a4\uff0c\u56e0\u6b64\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u628a\u5185\u5b58\u5206\u6210\u4e00\u5c0f\u5757\u4e00\u5c0f\u5757\u7684\uff0c\u4e5f\u5c31\u662f\u5185\u5b58\u5206\u9875\u7ba1\u7406\uff0c\u4e00\u9875\u7684\u5927\u5c0f\u4e00\u822c\u662f4K\u30018K\u6216\u800516K\u7b49\u7b49\uff0credis \u7684\u6570\u636e\u90fd\u662f\u5206\u5e03\u5728\u8fd9\u4e9b\u9875\u9762\u4e0a\u7684\uff0c\u51fa\u4e8e\u6548\u7387\u95ee\u9898\uff0cfork \u51fa\u6765\u7684\u5b50\u8fdb\u7a0b\u662f\u548c\u4e3b\u8fdb\u7a0b\u662f\u5171\u4eab\u540c\u4e00\u5757\u7684\u5185\u5b58\u7684\uff0c\u5e76\u4e0d\u4f1a\u590d\u5236\u5185\u5b58\uff0c\u5982\u679c\u8fd9\u671f\u95f4\u4e3b\u8fdb\u7a0b\u6709\u6570\u636e\u53d8\u66f4\uff0c\u90a3\u4e48\u4e3a\u4e86\u533a\u5206\uff0c\u8fd9\u65f6\u6700\u5feb\u6377\u7684\u505a\u6cd5\u5c31\u662f\u628a\u5bf9\u5e94\u7684\u6570\u636e\u9875\u91cd\u65b0\u590d\u5236\u4e00\u4e0b\uff0c\u7136\u540e\u4e3b\u7684\u53d8\u66f4\u5c31\u5728\u8fd9\u4e2a\u65b0\u7684\u6570\u636e\u9875\u4e0a\u4fee\u6539\uff0c\u5e76\u4e0d\u4f1a\u4fee\u6539\u6765\u7684\u6570\u636e\u9875\uff0c\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u5b50\u8fdb\u7a0b\u5904\u7406\u7684\u8fd8\u662f\u5f53\u65f6\u7684\u5feb\u7167\u3002<\/p>\n
    \u4ee5\u4e0a\u8bf4\u7684\u53d8\u66f4\u662f\u4ece\u5feb\u7167\u7684\u89d2\u5ea6\u6765\u8003\u8651\u7684\uff0c\u5982\u679c\u4ece\u6570\u636e\u7684\u4e00\u81f4\u6027\u6765\u8bf4\uff0c\u5f53\u5feb\u7167\u7684 rdb \u88ab\u4ece\u5e93\u5e94\u7528\u4e4b\u540e\uff0c\u8fd9\u671f\u95f4\u7684\u53d8\u66f4\u8be5\u5982\u4f55\u540c\u6b65\u7ed9\u4ece\u5e93\uff1f\u7b54\u6848\u662f\u7f13\u51b2\u533a\uff0c\u8fd9\u4e2a\u7f13\u51b2\u533a\u53eb\u505a replication buffer\uff0c\u4e3b\u5e93\u5728\u6536\u5230\u9700\u8981\u540c\u6b65\u7684\u547d\u4ee4\u4e4b\u540e\uff0c\u4f1a\u628a\u671f\u95f4\u7684\u53d8\u66f4\u90fd\u5148\u4fdd\u5b58\u5728\u8fd9\u4e2a\u7f13\u51b2\u533a\u4e2d\uff0c\u8fd9\u6837\u5728\u628a rdb \u53d1\u7ed9\u4ece\u5e93\u4e4b\u540e\uff0c\u7d27\u63a5\u7740\u4f1a\u518d\u628a replication buffer \u7684\u6570\u636e\u4e5f\u53d1\u7ed9\u4ece\u5e93\uff0c\u6700\u7ec8\u4e3b\u4ece\u5c31\u4fdd\u6301\u4e86\u4e00\u81f4\u3002<\/p>\n
    replication buffer\u4e0d\u662f\u4e07\u80fd\u7684\u8865\u7ed9\u5242<\/strong><\/p>\n
    \u6211\u4eec\u6765\u770b\u770b replication buffer \u6301\u7eed\u5199\u5165\u7684\u65f6\u95f4\u6709\u591a\u957f\u3002<\/p>\n
      \n
    1. \u6211\u4eec\u77e5\u9053\u4e3b\u4ece\u540c\u6b65\u7684\u65f6\u5019\uff0c\u4e3b\u5e93\u4f1a\u6267\u884c fork \u6765\u8ba9\u5b50\u8fdb\u7a0b\u5b8c\u6210\u76f8\u5e94\u5730\u5de5\u4f5c\uff0c\u56e0\u6b64\u5b50\u8fdb\u7a0b\u4ece\u5f00\u59cb\u6267\u884c bgsave \u5230\u6267\u884c\u5b8c\u6bd5\u8fd9\u671f\u95f4\uff0c\u53d8\u66f4\u662f\u8981\u5199\u5165 replication buffer \u7684\u3002<\/li>\n
    2. rdb \u751f\u6210\u597d\u4e4b\u540e\uff0c\u9700\u8981\u628a\u5b83\u53d1\u9001\u7ed9\u4ece\u5e93\uff0c\u8fd9\u4e2a\u7f51\u7edc\u4f20\u8f93\u662f\u4e0d\u662f\u4e5f\u9700\u8981\u8017\u70b9\u65f6\u95f4\uff0c\u8fd9\u671f\u95f4\u4e5f\u662f\u8981\u5199\u5165 replication buffer \u7684\u3002<\/li>\n
    3. \u4ece\u5e93\u5728\u6536\u5230 rdb \u4e4b\u540e\u9700\u8981\u628a rdb \u5e94\u7528\u5230\u5185\u5b58\u91cc\uff0c\u8fd9\u671f\u95f4\u4ece\u5e93\u662f\u963b\u585e\u7684\uff0c\u65e0\u6cd5\u63d0\u4f9b\u670d\u52a1\uff0c\u56e0\u6b64\u8fd9\u671f\u95f4\u4e5f\u662f\u8981\u5199\u5165 replication buffer \u7684\u3002<\/li>\n<\/ol>\n
      replication buffer \u65e2\u7136\u662f\u4e2a buffer\uff0c\u90a3\u4e48\u5b83\u7684\u5927\u5c0f\u5c31\u662f\u6709\u9650\u7684\uff0c\u5982\u679c\u8bf4\u4e0a\u97623\u4e2a\u6b65\u9aa4\u4e2d\uff0c\u53ea\u8981\u6709\u4e00\u4e2a\u8017\u65f6\u957f\uff0c\u5c31\u4f1a\u5bfc\u81f4 replication buffer \u5feb\u901f\u589e\u957f\uff08\u524d\u63d0\u662f\u6709\u6b63\u5e38\u7684\u5199\u5165\uff09\uff0c\u5f53 replication buffer \u8d85\u8fc7\u4e86\u9650\u5236\u4e4b\u540e\u5c31\u4f1a\u5bfc\u81f4\u4e3b\u5e93\u548c\u4ece\u5e93\u4e4b\u95f4\u7684\u8fde\u63a5\u65ad\u5f00\uff0c\u65ad\u5f00\u4e4b\u540e\u5982\u679c\u4ece\u5e93\u518d\u6b21\u8fde\u63a5\u4e0a\u6765\u5c31\u4f1a\u5bfc\u81f4\u91cd\u65b0\u5f00\u59cb\u590d\u5236\uff0c\u7136\u540e\u91cd\u590d\u540c\u6837\u7684\u6f2b\u957f\u7684\u590d\u5236\u6b65\u9aa4\uff0c\u56e0\u6b64\u8fd9\u4e2a replication buffer \u7684\u5927\u5c0f\u8fd8\u662f\u5f88\u5173\u952e\u7684\uff0c\u4e00\u822c\u9700\u8981\u6839\u636e\u5199\u5165\u7684\u901f\u5ea6\u3001\u6bcf\u79d2\u5199\u5165\u7684\u91cf\u548c\u7f51\u7edc\u4f20\u8f93\u7684\u901f\u5ea6\u7b49\u56e0\u7d20\u6765\u7efc\u5408\u5224\u65ad\u3002<\/p>\n
      \u4ece\u5e93\u7f51\u7edc\u4e0d\u597d\u548c\u4e3b\u5e93\u65ad\u4e86\u8be5\u600e\u4e48\u529e\uff1f<\/strong><\/p>\n
      \u6b63\u5e38\u6765\u8bf4\uff0c\u53ea\u8981\u4e3b\u4ece\u4e4b\u95f4\u7684\u8fde\u63a5\u5efa\u7acb\u597d\u4e86\uff0c\u540e\u9762\u4e3b\u5e93\u7684\u53d8\u66f4\u53ef\u4ee5\u76f4\u63a5\u53d1\u7ed9\u4ece\u5e93\uff0c\u8ba9\u4ece\u5e93\u76f4\u63a5\u56de\u653e\uff0c\u4f46\u662f\u6211\u4eec\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u7f51\u7edc\u73af\u5883\u662f\u767e\u5206\u767e\u7684\u901a\u7545\u7684\uff0c\u56e0\u6b64\u4e5f\u8981\u8003\u8651\u4ece\u5e93\u548c\u4e3b\u5e93\u4e4b\u95f4\u7684\u65ad\u8054\u95ee\u9898\u3002<\/p>\n
      \u5e94\u8be5\u662f\u5728 redis2.8 \u4ee5\u524d\uff0c\u53ea\u8981\u4ece\u5e93\u65ad\u8054\uff0c\u54ea\u6015\u53ea\u6709\u5f88\u77ed\u7684\u65f6\u95f4\uff0c\u540e\u9762\u4ece\u5e93\u518d\u6b21\u8fde\u63a5\u4e0a\u6765\u7684\u65f6\u5019\uff0c\u4e3b\u5e93\u4e5f\u4f1a\u76f4\u63a5\u65e0\u8111\u7684\u8fdb\u884c\u5168\u91cf\u540c\u6b65\u3002\u5728 2.8 \u7248\u672c\u53ca\u4ee5\u540e\uff0c\u5f00\u59cb\u652f\u6301\u589e\u91cf\u590d\u5236\u4e86\uff0c\u589e\u91cf\u590d\u5236\u7684\u539f\u7406\u5c31\u662f\u5f97\u6709\u4e2a\u7f13\u51b2\u533a\u6765\u4fdd\u5b58\u53d8\u66f4\u7684\u8bb0\u5f55\uff0c\u8fd9\u91cc\u8fd9\u4e2a\u7f13\u51b2\u533a\u53eb\u505arepl_backlog_buffer\uff0c\u8fd9\u4e2a\u7f13\u51b2\u533a\u4ece\u903b\u8f91\u4e0a\u6765\u8bf4\u662f\u4e2a\u73af\u5f62\u7f13\u51b2\u533a\uff0c\u5199\u6ee1\u4e86\u5c31\u4f1a\u4ece\u5934\u5f00\u59cb\u8986\u76d6\uff0c\u6240\u4ee5\u4e5f\u6709\u5927\u5c0f\u9650\u5236\u3002\u5728\u4ece\u5e93\u91cd\u65b0\u8fde\u63a5\u4e0a\u6765\u7684\u65f6\u5019\uff0c\u4ece\u5e93\u4f1a\u544a\u8bc9\u4e3b\u5e93\uff1a\u201c\u6211\u5f53\u524d\u5df2\u7ecf\u590d\u5236\u5230\u4e86xx\u4f4d\u7f6e\u201d\uff0c\u4e3b\u5e93\u6536\u5230\u4ece\u5e93\u7684\u6d88\u606f\u4e4b\u540e\u5f00\u59cb\u67e5\u770bxx\u4f4d\u7f6e\u7684\u6570\u636e\u662f\u5426\u8fd8\u5728 repl_backlog_buffer \u4e2d\uff0c\u5982\u679c\u5728\u7684\u8bdd\uff0c\u76f4\u63a5\u628axx\u540e\u9762\u7684\u6570\u636e\u53d1\u7ed9\u4ece\u5e93\u5373\u53ef\uff0c\u5982\u679c\u4e0d\u5728\u7684\u8bdd\uff0c\u90a3\u65e0\u80fd\u4e3a\u529b\u4e86\uff0c\u53ea\u80fd\u518d\u6b21\u8fdb\u884c\u5168\u91cf\u540c\u6b65\u3002<\/p>\n
      \u9700\u8981\u4e00\u4e2a\u7ba1\u7406\u8005<\/h3>\n
      \u5728\u4e3b\u4ece\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u4e3b\u5e93\u6302\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u4e00\u4e2a\u4ece\u5e93\u5347\u7ea7\u6210\u4e3b\u5e93\uff0c\u4f46\u662f\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u624b\u52a8\u7684\uff0c\u9760\u4eba\u529b\u6765\u64cd\u4f5c\uff0c\u4e0d\u80fd\u4f7f\u635f\u5931\u964d\u5230\u6700\u4f4e\uff0c\u8fd8\u662f\u9700\u8981\u4e00\u5957\u81ea\u52a8\u7ba1\u7406\u548c\u9009\u4e3e\u7684\u673a\u5236\uff0c\u8fd9\u5c31\u662f\u54e8\u5175\uff0c\u54e8\u5175\u5b83\u672c\u8eab\u4e5f\u662f\u4e2a\u670d\u52a1\uff0c\u53ea\u4e0d\u8fc7\u5b83\u4e0d\u5904\u7406\u6570\u636e\u7684\u8bfb\u5199\u800c\u5df2\uff0c\u5b83\u53ea\u8d1f\u8d23\u7ba1\u7406\u6240\u6709\u7684 redis \u5b9e\u4f8b\uff0c\u54e8\u5175\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u4f1a\u548c\u5404\u4e2a redis \u901a\u4fe1\uff08ping \u64cd\u4f5c\uff09\uff0c\u6bcf\u4e2a redis \u5b9e\u4f8b\u53ea\u8981\u5728\u89c4\u5b9a\u7684\u65f6\u95f4\u5185\u53ca\u65f6\u56de\u590d\uff0c\u5c31\u53ef\u4ee5\u8868\u660e\u81ea\u5df1\u7684\u7acb\u573a\u3002\u5f53\u7136\u54e8\u5175\u672c\u8eab\u4e5f\u53ef\u80fd\u5b58\u5728\u5b95\u673a\u6216\u8005\u7f51\u7edc\u4e0d\u901a\u7684\u60c5\u51b5\uff0c\u56e0\u6b64\u4e00\u822c\u54e8\u5175\u4e5f\u4f1a\u642d\u5efa\u4e2a\u54e8\u5175\u96c6\u7fa4\uff0c\u8fd9\u4e2a\u96c6\u7fa4\u7684\u4e2a\u6570\u6700\u597d\u662f\u5947\u6570\uff0c\u6bd4\u59823\u4e2a\u6216\u80055\u8fd9\u4e2a\u8fd9\u79cd\uff0c\u5947\u6570\u7684\u76ee\u7684\u4e3b\u8981\u5c31\u662f\u4e3a\u4e86\u9009\u4e3e\uff08\u5c11\u6570\u670d\u4ece\u591a\u6570\uff09\u3002<\/p>\n
      \u5f53\u67d0\u4e2a\u54e8\u5175\u5728\u53d1\u8d77 ping \u540e\u6ca1\u6709\u53ca\u65f6\u6536\u5230 pong\uff0c\u90a3\u4e48\u5c31\u4f1a\u628a\u8fd9\u4e2a redis \u5b9e\u4f8b\u6807\u8bb0\u4e0b\u7ebf\uff0c\u6b64\u65f6\u5b83\u8fd8\u662f\u4e0d\u662f\u771f\u6b63\u7684\u4e0b\u7ebf\uff0c\u8fd9\u65f6\u5176\u4ed6\u7684\u54e8\u5175\u4e5f\u4f1a\u5224\u5b9a\u5f53\u524d\u8fd9\u4e2a\u54e8\u5175\u662f\u4e0d\u662f\u771f\u6b63\u7684\u4e0b\u7ebf\uff0c\u5f53\u5927\u591a\u6570\u54e8\u5175\u90fd\u8ba4\u5b9a\u8fd9\u4e2a redis \u662f\u4e0b\u7ebf\u72b6\u6001\uff0c\u90a3\u4e48\u5c31\u4f1a\u628a\u5b83\u4ece\u96c6\u7fa4\u4e2d\u8e22\u51fa\u53bb\uff0c\u5982\u679c\u4e0b\u7ebf\u7684\u662f\u4ece\u5e93\uff0c\u90a3\u4e48\u8fd8\u597d\uff0c\u76f4\u63a5\u8e22\u51fa\u53bb\u5c31ok\uff0c\u5982\u679c\u662f\u4e3b\u5e93\u8fd8\u8981\u89e6\u53d1\u9009\u4e3e\uff0c\u9009\u4e3e\u4e5f\u4e0d\u662f\u76f2\u76ee\u9009\u4e3e\uff0c\u80af\u5b9a\u662f\u8981\u9009\u51fa\u6700\u5408\u9002\u7684\u90a3\u4e2a\u4ece\u6765\u5145\u5f53\u65b0\u7684\u4e3b\u5e93\u3002\u8fd9\u4e2a\u6700\u5408\u9002\u5145\u5f53\u4e3b\u5e93\u7684\u5e93\uff0c\u4e00\u822c\u4f1a\u6309\u7167\u4ee5\u4e0b\u4f18\u5148\u7ea7\u6765\u786e\u5b9a\uff1a<\/p>\n
        \n
      1. \u6743\u91cd\uff0c\u6bcf\u4e2a\u4ece\u5e93\u5176\u5b9e\u90fd\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u6743\u91cd\uff0c\u6743\u91cd\u8d8a\u9ad8\u7684\u4ece\u5e93\u4f1a\u88ab\u4f18\u5148\u9009\u62e9<\/li>\n
      2. \u590d\u5236\u7684\u8fdb\u5ea6\uff0c\u6bcf\u4e2a\u4ece\u5e93\u590d\u5236\u7684\u8fdb\u5ea6\u53ef\u80fd\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4f18\u5148\u9009\u62e9\u5f53\u524d\u548c\u4e3b\u5e93\u6570\u636e\u5dee\u8ddd\u6700\u5c0f\u7684\u90a3\u4e2a<\/li>\n
      3. \u670d\u52a1\u7684 ID\uff0c\u5176\u5b9e\u6bcf\u4e2a redis \u5b9e\u4f8b\u90fd\u6709\u81ea\u5df1\u7684 ID\uff0c\u5982\u679c\u4ee5\u4e0a\u6761\u4ef6\u90fd\u4e00\u6837\uff0c\u90a3\u4e48\u4f1a\u9009\u62e9 ID \u6700\u5c0f\u7684\u90a3\u4e2a\u5e93\u6765\u5145\u5f53\u4e3b\u5e93<\/li>\n<\/ol>\n
        \u66f4\u5f3a\u7684\u6a2a\u5411\u4f38\u7f29\u6027<\/h3>\n
        \u4e3b\u4ece\u6a21\u5f0f\u89e3\u51b3\u4e86\u5355\u70b9\u6545\u969c\u95ee\u9898\uff0c\u540c\u65f6\u8bfb\u5199\u5206\u79bb\u6280\u672f\u4f7f\u5f97\u5e94\u7528\u652f\u6491\u80fd\u529b\u66f4\u5f3a\uff0c\u54e8\u5175\u6a21\u5f0f\u53ef\u4ee5\u81ea\u52a8\u76d1\u7ba1\u96c6\u7fa4\uff0c\u5b9e\u73b0\u81ea\u52a8\u9009\u4e3b\uff0c\u81ea\u52a8\u5254\u9664\u6545\u969c\u8282\u70b9\u7684\u80fd\u529b\u3002<\/p>\n
        \u6b63\u5e38\u6765\u8bf4\u53ea\u8981\u8bfb\u7684\u538b\u529b\u8d8a\u6765\u8d8a\u5927\uff0c\u6211\u4eec\u53ef\u4ee5\u6dfb\u52a0\u4ece\u5e93\u6765\u7f13\u89e3\uff0c\u90a3\u5982\u679c\u4e3b\u5e93\u538b\u529b\u5f88\u5927\u600e\u4e48\u529e\uff1f\u8fd9\u5c31\u5f97\u63d0\u5230\u63a5\u4e0b\u6765\u8981\u8bf4\u7684\u5206\u7247\u6280\u672f\u4e86\uff0c\u6211\u4eec\u53ea\u9700\u8981\u628a\u4e3b\u5e93\u5207\u6210\u51e0\u7247\uff0c\u90e8\u7f72\u5230\u4e0d\u540c\u7684\u673a\u5668\u4e0a\u5373\u53ef\u3002\u8fd9\u4e2a\u5206\u7247\u5c31\u662f redis \u4e2d\u7684\u69fd\u6982\u5ff5\u4e86\uff0c\u5f53\u5206\u7247\u7684\u65f6\u5019\uff0credis \u4f1a\u9ed8\u8ba4\u5206\u6210 0\uff5e16383 \u4e5f\u5c31\u662f\u4e00\u5171 16384 \u4e2a\u69fd\uff0c\u7136\u540e\u628a\u8fd9\u4e9b\u69fd\u5e73\u5747\u5206\u5230\u6bcf\u4e2a\u5206\u7247\u8282\u70b9\u4e0a\u5c31\u53ef\u4ee5\u8d77\u5230\u8d1f\u8f7d\u5747\u8861\u7684\u4f5c\u7528\u4e86\u3002\u6bcf\u4e2a key \u5177\u4f53\u8be5\u5206\u5230\u54ea\u4e2a\u69fd\u4e2d\uff0c\u4e3b\u8981\u662f\u5148 CRC16 \u5f97\u5230\u4e00\u4e2a 16bit \u7684\u6570\u5b57\uff0c\u7136\u540e\u8fd9\u4e2a\u6570\u5b57\u518d\u5bf9 16384 \u53d6\u6a21\u5373\u53ef\uff1a<\/p>\n
        crc16(key)%16384\n<\/pre>\n
        \u7136\u540e\u5ba2\u6237\u7aef\u4f1a\u7f13\u5b58\u69fd\u4fe1\u606f\uff0c\u8fd9\u6837\u6bcf\u5f53\u4e00\u4e2a key \u5230\u6765\u65f6\uff0c\u53ea\u8981\u901a\u8fc7\u8ba1\u7b97\u5c31\u77e5\u9053\u8be5\u53d1\u7ed9\u54ea\u4e2a\u5b9e\u4f8b\u6765\u5904\u7406\u6765\u4e86\u3002\u4f46\u662f\u5ba2\u6237\u7aef\u7f13\u5b58\u7684\u69fd\u4fe1\u606f\u5e76\u4e0d\u662f\u4e00\u6210\u4e0d\u53d8\u7684\uff0c\u6bd4\u5982\u5728\u589e\u52a0\u5b9e\u4f8b\u7684\u65f6\u5019\uff0c\u8fd9\u65f6\u5019\u4f1a\u5bfc\u81f4\u91cd\u65b0\u5206\u7247\uff0c\u90a3\u4e48\u539f\u6765\u5ba2\u6237\u7aef\u7f13\u5b58\u7684\u4fe1\u606f\u5c31\u4f1a\u4e0d\u51c6\u786e\uff0c\u4e00\u822c\u8fd9\u65f6\u5019\u4f1a\u53d1\u751f\u4e24\u4e2a\u5e38\u89c1\u7684\u9519\u8bef\uff0c\u4e25\u683c\u6765\u8bf4\u4e5f\u4e0d\u662f\u9519\u8bef\uff0c\u66f4\u50cf\u4e00\u79cd\u4fe1\u606f\uff0c\u4e00\u4e2a\u53eb\u505aMOVED\uff0c\u4e00\u4e2a\u53eb\u505aASK\u3002moved\u7684\u610f\u601d\u5c31\u8bf4\uff0c\u539f\u6765\u662f\u5b9e\u4f8bA\u8d1f\u8d23\u7684\u6570\u636e\uff0c\u73b0\u5728\u88ab\u8fc1\u79fb\u5230\u4e86\u5b9e\u4f8bB\uff0cMOVED \u4ee3\u8868\u7684\u662f\u8fc1\u79fb\u5b8c\u6210\u7684\uff0c\u4f46\u662f ASK \u4ee3\u8868\u7684\u662f\u6b63\u5728\u8fc1\u79fb\u8fc7\u7a0b\u4e2d\uff0c\u6bd4\u5982\u539f\u6765\u662f\u5b9e\u4f8bA\u8d1f\u8d23\u7684\u90e8\u5206\u6570\u636e\uff0c\u73b0\u5728\u88ab\u8fc1\u79fb\u5230\u4e86\u5b9e\u4f8bB\uff0c\u5269\u4e0b\u7684\u8fd8\u5728\u7b49\u5f85\u8fc1\u79fb\u4e2d\uff0c\u5f53\u6570\u636e\u8fc1\u79fb\u5b8c\u6bd5\u4e4b\u540e ASK \u5c31\u4f1a\u53d8\u6210 MOVED\uff0c\u7136\u540e\u5ba2\u6237\u7aef\u6536\u5230 MOVED \u4fe1\u606f\u4e4b\u540e\u5c31\u4f1a\u518d\u6b21\u66f4\u65b0\u4e0b\u672c\u5730\u7f13\u5b58\uff0c\u8fd9\u6837\u4e0b\u6b21\u5c31\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u4e24\u4e2a\u9519\u8bef\u4e86\u3002<\/p>\n
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