{"id":123556,"date":"2024-10-25T13:49:18","date_gmt":"2024-10-25T05:49:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/123556\/"},"modified":"2024-10-25T13:49:19","modified_gmt":"2024-10-25T05:49:19","slug":"redis-%e9%9b%86%e7%be%a4%e6%a8%a1%e5%bc%8f%e7%b2%be%e6%ba%96%e5%88%86%e7%89%87%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%88%86%e5%b8%83%e5%bc%8f%e6%80%a7%e8%83%bd%e6%8f%90%e5%8d%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/123556\/","title":{"rendered":"Redis \u96c6\u7fa4\u6a21\u5f0f\u7cbe\u6e96\u5206\u7247\u5be6\u73fe\u6578\u64da\u5206\u5e03\u5f0f\u6027\u80fd\u63d0\u5347"},"content":{"rendered":"

Redis \u96c6\u7fa4\u6a21\u5f0f\u7cbe\u6e96\u5206\u7247\u5be6\u73fe\u6578\u64da\u5206\u5e03\u5f0f\u6027\u80fd\u63d0\u5347<\/h1>\n

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Redis \u96c6\u7fa4\u6a21\u5f0f\u6982\u8ff0<\/h2>\n

Redis \u96c6\u7fa4\u6a21\u5f0f\u5141\u8a31\u7528\u6236\u5c07\u6578\u64da\u5206\u6563\u5230\u591a\u500b\u7bc0\u9ede\u4e0a\uff0c\u9019\u6a23\u4e0d\u50c5\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u7528\u6027\uff0c\u9084\u80fd\u5920\u5be6\u73fe\u8ca0\u8f09\u5747\u8861\u3002Redis \u96c6\u7fa4\u7684\u6838\u5fc3\u5728\u65bc\u5176\u5206\u7247\u6a5f\u5236\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u53ef\u4ee5\u6839\u64da\u7279\u5b9a\u7684\u7b97\u6cd5\u5206\u914d\u5230\u4e0d\u540c\u7684\u7bc0\u9ede\u4e0a\u3002\u9019\u7a2e\u5206\u7247\u65b9\u5f0f\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u5b58\u53d6\u901f\u5ea6\uff0c\u9084\u80fd\u5920\u6709\u6548\u5730\u5229\u7528\u7cfb\u7d71\u8cc7\u6e90\u3002<\/p>\n

\u7cbe\u6e96\u5206\u7247\u7684\u5be6\u73fe<\/h2>\n

Redis \u7684\u5206\u7247\u6a5f\u5236\u4e3b\u8981\u4f9d\u8cf4\u65bc\u54c8\u5e0c\u69fd\uff08hash slots\uff09\u3002\u5728 Redis \u96c6\u7fa4\u4e2d\uff0c\u6240\u6709\u7684\u9375\u90fd\u6703\u88ab\u6620\u5c04\u5230 0 \u5230 16383 \u7684\u54c8\u5e0c\u69fd\u4e2d\u3002\u9019\u610f\u5473\u8457\u6bcf\u500b\u9375\u90fd\u6703\u88ab\u5206\u914d\u5230\u4e00\u500b\u7279\u5b9a\u7684\u69fd\uff0c\u7136\u5f8c\u9019\u4e9b\u69fd\u6703\u88ab\u5206\u914d\u5230\u4e0d\u540c\u7684\u7bc0\u9ede\u4e0a\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u4f7f\u5f97 Redis \u80fd\u5920\u5728\u96c6\u7fa4\u4e2d\u5be6\u73fe\u7cbe\u6e96\u7684\u6578\u64da\u5206\u7247\u3002<\/p>\n

\u54c8\u5e0c\u69fd\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n

\u7576\u7528\u6236\u5411 Redis \u4e2d\u5beb\u5165\u6578\u64da\u6642\uff0c\u7cfb\u7d71\u6703\u6839\u64da\u9375\u7684\u540d\u7a31\u8a08\u7b97\u51fa\u5176\u54c8\u5e0c\u503c\uff0c\u7136\u5f8c\u5c07\u5176\u6620\u5c04\u5230 16384 \u500b\u54c8\u5e0c\u69fd\u4e2d\u7684\u4e00\u500b\u3002\u9019\u500b\u904e\u7a0b\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u4ee3\u78bc\u793a\u4f8b\u4f86\u7406\u89e3\uff1a<\/p>\n

function getHashSlot(key) {\n    return crc16(key) % 16384;\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c`crc16` \u51fd\u6578\u7528\u65bc\u8a08\u7b97\u9375\u7684\u54c8\u5e0c\u503c\uff0c\u7136\u5f8c\u901a\u904e\u53d6\u6a21\u904b\u7b97\u5c07\u5176\u6620\u5c04\u5230\u54c8\u5e0c\u69fd\u4e2d\u3002\u9019\u6a23\uff0c\u7576\u6578\u64da\u88ab\u5beb\u5165\u6642\uff0cRedis \u53ef\u4ee5\u5feb\u901f\u78ba\u5b9a\u8a72\u6578\u64da\u61c9\u8a72\u5b58\u5132\u5728\u54ea\u500b\u7bc0\u9ede\u4e0a\u3002<\/p>\n
\u6578\u64da\u7684\u8b80\u53d6\u8207\u5beb\u5165<\/h3>\n
\u5728\u8b80\u53d6\u6578\u64da\u6642\uff0cRedis \u6703\u6839\u64da\u9375\u8a08\u7b97\u51fa\u5176\u54c8\u5e0c\u69fd\uff0c\u7136\u5f8c\u76f4\u63a5\u8a2a\u554f\u5c0d\u61c9\u7684\u7bc0\u9ede\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u8b80\u53d6\u901f\u5ea6\uff0c\u9084\u6e1b\u5c11\u4e86\u7db2\u7d61\u5ef6\u9072\u3002\u4ee5\u4e0b\u662f\u8b80\u53d6\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n
function getValue(key) {\n    const slot = getHashSlot(key);\n    return redisClient.get(key); \/\/ \u5047\u8a2d redisClient \u5df2\u7d93\u9023\u63a5\u5230\u6b63\u78ba\u7684\u7bc0\u9ede\n}\n<\/code><\/pre>\n
\u6027\u80fd\u63d0\u5347\u7684\u5be6\u969b\u6848\u4f8b<\/h2>\n
\u8a31\u591a\u4f01\u696d\u5728\u5be6\u65bd Redis \u96c6\u7fa4\u6a21\u5f0f\u5f8c\uff0c\u5831\u544a\u4e86\u986f\u8457\u7684\u6027\u80fd\u63d0\u5347\u3002\u4f8b\u5982\uff0c\u4e00\u5bb6\u96fb\u5b50\u5546\u52d9\u516c\u53f8\u5728\u4f7f\u7528 Redis \u96c6\u7fa4\u5f8c\uff0c\u5176\u67e5\u8a62\u901f\u5ea6\u63d0\u9ad8\u4e86 50%\uff0c\u4e26\u4e14\u80fd\u5920\u540c\u6642\u8655\u7406\u66f4\u591a\u7684\u8acb\u6c42\u3002\u9019\u4f7f\u5f97\u4ed6\u5011\u80fd\u5920\u5728\u9ad8\u5cf0\u671f\u4fdd\u6301\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u4e26\u63d0\u5347\u4e86\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
Redis \u96c6\u7fa4\u6a21\u5f0f\u7684\u7cbe\u6e96\u5206\u7247\u6280\u8853\u70ba\u6578\u64da\u7684\u5206\u5e03\u5f0f\u6027\u80fd\u63d0\u5347\u63d0\u4f9b\u4e86\u5f37\u6709\u529b\u7684\u652f\u6301\u3002\u901a\u904e\u54c8\u5e0c\u69fd\u7684\u8a2d\u8a08\uff0cRedis \u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u5927\u91cf\u6578\u64da\uff0c\u4e26\u5be6\u73fe\u9ad8\u6548\u7684\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\u3002\u96a8\u8457\u4f01\u696d\u5c0d\u6578\u64da\u9700\u6c42\u7684\u589e\u52a0\uff0cRedis \u7684\u96c6\u7fa4\u6a21\u5f0f\u5c07\u6210\u70ba\u672a\u4f86\u6578\u64da\u7ba1\u7406\u7684\u91cd\u8981\u9078\u64c7\u3002<\/p>\n
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