- \n
- \u64cd\u4f5c\u6570\u636e\u7ed3\u6784\u7684\u8bed\u53e5（\u5373\u6267\u884c\u6307\u4ee4）\u662f\u4e3b\u7ebf\u7a0b（\u5355\u7ebf\u7a0b，\u5929\u7136\u5177\u5907\u9694\u79bb\u6027\u3001\u4e0d\u9700\u8981\u52a0\u9501）<\/li>\n
- \u522b\u7684\u7ebf\u7a0b\u4e3b\u8981\u7528\u4e8e\u4f18\u5316：\u907f\u514dIO\u5bc6\u96c6\u578b\u548cCPU\u5bc6\u96c6\u578b\u8fc7\u591a\u5360\u7528\u4e3b\u7ebf\u7a0b<\/li>\n<\/ul>\n
\u4e8c\u3001IO\u5bc6\u96c6\u578b\u5c42\u9762\u7684\u4f18\u5316<\/h2>\n
1. \u78c1\u76d8IO<\/h3>\n
- \n
- rdb：\u901a\u8fc7fork\u5b50\u8fdb\u7a0b\u6765\u6301\u4e45\u5316<\/li>\n
- aof：\u6709\u5f02\u6b65\u5237\u76d8\u673a\u5236（\u53ef\u9009）<\/li>\n<\/ul>\n
2. \u7f51\u7edcIO<\/h3>\n
- \n
- \u901a\u8fc7reactor\u6a21\u578b\u7ba1\u7406\u591a\u4e2a\u8fde\u63a5（\u4e3b\u7ebf\u7a0b）<\/li>\n
- \u6570\u636e\u7684\u63a5\u6536，\u6570\u636e\u53d1\u9001\u5206\u644a\u5230\u591a\u4e2aio\u5b50\u8fdb\u7a0b\u4e2d<\/li>\n<\/ul>\n
\u4e09\u3001CPU\u5bc6\u96c6\u578b\u5c42\u9762\u7684\u4f18\u5316<\/h2>\n
- \n
- \u5206\u6cbb\u601d\u60f3：\u534f\u8bae\u7684\u89e3\u6790（\u547d\u4ee4\u63a5\u6536\u5b8c\u4e4b\u540e）\u3001\u534f\u8bae\u7684\u52a0\u5bc6（\u54cd\u5e94\u56de\u590d\u524d）\u5206\u644a\u5230\u591a\u4e2aio\u5b50\u8fdb\u7a0b<\/li>\n
- \u6570\u636e\u7ed3\u6784\u7684\u5207\u6362：value\u7684\u4e0d\u540c\u6570\u636e\u7ed3\u6784\u5e95\u5c42\u5b58\u50a8\u65b9\u5f0f\u5728\u6570\u636e\u91cf\u4e0d\u540c\u60c5\u51b5\u4e0b\u91c7\u53d6\u4e0d\u540c\u7684\u7b56\u7565（\u5728\u6267\u884c\u6548\u7387\u4e0e\u7a7a\u95f4\u5360\u6bd4\u95f4\u4fdd\u6301\u5e73\u8861）<\/li>\n
- \u6e10\u8fdb\u5f0f\u6570\u636e\u8fc1\u79fb：rehash\u7684\u4e24\u79cd\u65b9\u5f0f：\n
- \n
- \u6bcf\u6267\u884c\u4e00\u6761\u6307\u4ee4copy\u4e00\u4e2a\u69fd\u4f4d<\/li>\n
- \u5f53\u670d\u52a1\u5668\u7a7a\u95f2\u65f6，\u5b9a\u65f61ms\u8fdb\u884crehash\u7684\u6570\u636e\u8fc1\u79fb<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u56db\u3001\u6570\u636e\u7ed3\u6784\u5c42\u9762\u4f18\u5316<\/h2>\n
\n
\u7f16\u7801\u7c7b\u578b\u7279\u70b9（\u5185\u5b58 \/ \u6027\u80fd）\u9002\u7528\u573a\u666f<\/tr>\n \n\n \u7d27\u51d1\u7f16\u7801（ziplist\/intset\/embstr）<\/td>\n \u5185\u5b58\u5360\u7528\u6781\u5c11，\u5b58\u50a8\u5bc6\u5ea6\u9ad8，\u4f46\u589e\u5220\u6539\u9700\u8981\u9891\u7e41\u91cd\u6392\u5185\u5b58<\/td>\n \u6570\u636e\u91cf\u5c0f\u3001\u8bbf\u95ee\u4e0d\u9891\u7e41<\/td>\n<\/tr>\n \n \u9ad8\u6548\u7f16\u7801（dict\/skiplist\/raw）<\/td>\n \u5185\u5b58\u5360\u7528\u9ad8（\u6709\u7ed3\u6784\u5f00\u9500），\u4f46\u589e\u5220\u6539\u67e5\u6548\u7387\u9ad8（O (1)\/O (logN)）<\/td>\n \u6570\u636e\u91cf\u5927\u3001\u8bbf\u95ee\u9891\u7e41<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u7b80\u5355\u8bf4：\u6570\u636e\u91cf\u5c0f\u65f6\u7528 \u201c\u7d27\u51d1\u7f16\u7801\u201d \u7701\u5185\u5b58，\u6570\u636e\u91cf\u5927\u65f6\u7528 \u201c\u9ad8\u6548\u7f16\u7801\u201d \u4fdd\u6027\u80fd\u3002<\/p>\n<\/p>\n
1. \u54c8\u5e0c （ziplist \u2192 dict）<\/h3>\n
- \n
- ziplist（\u538b\u7f29\u5217\u8868）：\n
- \n
- \u5185\u5b58\u4e0a：\u6240\u6709\u952e\u503c\u5bf9 \/ \u5143\u7d20\u8fde\u7eed\u5b58\u50a8，\u65e0\u5197\u4f59\u6307\u9488（dict \u6bcf\u4e2a\u952e\u503c\u5bf9\u8981\u5b58\u4e24\u4e2a\u6307\u9488，skiplist \u6bcf\u4e2a\u8282\u70b9\u6709\u591a\u5c42\u6307\u9488），\u5185\u5b58\u5bc6\u5ea6\u662f dict \u7684 1\/5 \u4ee5\u4e0a；<\/li>\n
- \u6027\u80fd\u4e0a：\u589e\u5220\u6539\u9700\u8981\u91cd\u6392\u6574\u4e2a\u5217\u8868（O (n)），\u4f46\u6570\u636e\u91cf\u5c0f（\u2264512\/128 \u4e2a\u5143\u7d20）\u65f6，n \u5f88\u5c0f，\u6027\u80fd\u635f\u8017\u53ef\u5ffd\u7565；<\/li>\n<\/ul>\n<\/li>\n
- dict\/skiplist：\n
- \n
- \u5185\u5b58\u4e0a：dict \u6709\u54c8\u5e0c\u8868\u5f00\u9500（\u6876\u6570\u7ec4 + \u94fe\u8868）\u00a0；<\/li>\n
- \u6027\u80fd\u4e0a：dict \u67e5\u6539 O (1), \u6570\u636e\u91cf\u5927\u65f6\u8fdc\u5feb\u4e8e ziplist \u7684 O (n)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u8bbe\u8ba1\u76ee\u7684：\u5c0f\u54c8\u5e0c\u7701\u5185\u5b58，\u5927\u54c8\u5e0c\u7528 dict\u4fdd\u8bc1\u8bfb\u5199\u6027\u80fd\u3002<\/p>\n<\/p>\n
1.1 hashTypeSet<\/h4>\n
\/* \u7ed9\u54c8\u5e0c\u5bf9\u8c61\u8bbe\u7f6e field-value \u952e\u503c\u5bf9
\n * \u53c2\u6570\u8bf4\u660e：
\n * o: \u76ee\u6807\u54c8\u5e0c\u5bf9\u8c61（robj \u7c7b\u578b）
\n * field: \u54c8\u5e0c\u7684\u5b57\u6bb5（SDS \u5b57\u7b26\u4e32）
\n * value: \u54c8\u5e0c\u7684\u53d6\u503c（SDS \u5b57\u7b26\u4e32）
\n * flags: \u63a7\u5236\u6807\u5fd7（\u5982\u662f\u5426\u63a5\u7ba1 field\/value \u7684\u5185\u5b58\u6240\u6709\u6743）
\n * \u8fd4\u56de\u503c：1 \u8868\u793a\u66f4\u65b0\u4e86\u5df2\u6709\u5b57\u6bb5，0 \u8868\u793a\u65b0\u589e\u4e86\u5b57\u6bb5
\n *\/
\nint hashTypeSet(robj *o, sds field, sds value, int flags) {
\n int update = 0; \/\/ \u6807\u8bb0\u662f\u5426\u662f\u201c\u66f4\u65b0\u201d\u64cd\u4f5c（1=\u66f4\u65b0，0=\u65b0\u589e）<\/p>\n\/* \u5206\u652f1：\u54c8\u5e0c\u5bf9\u8c61\u5f53\u524d\u662f LISTPACK \u7f16\u7801（\u7d27\u51d1\u5b58\u50a8，\u66ff\u4ee3\u65e7\u7684 ziplist） *\/
\n if (o->encoding == OBJ_ENCODING_LISTPACK) {
\n unsigned char *zl, *fptr, *vptr;<\/p>\nzl = o->ptr; \/\/ \u53d6\u51fa listpack \u6307\u9488（o->ptr \u6307\u5411 listpack \u7ed3\u6784\u4f53）
\n fptr = lpFirst(zl); \/\/ \u6307\u5411 listpack \u7b2c\u4e00\u4e2a\u5143\u7d20
\n if (fptr != NULL) { \/\/ listpack \u975e\u7a7a
\n \/\/ \u5728 listpack \u4e2d\u67e5\u627e\u6307\u5b9a field（1 \u8868\u793a\u201c\u5339\u914d\u6574\u4e2a\u5b57\u6bb5\u201d）
\n fptr = lpFind(zl, fptr, (unsigned char*)field, sdslen(field), 1);
\n if (fptr != NULL) { \/\/ \u627e\u5230\u8be5 field，\u6267\u884c\u201c\u66f4\u65b0\u201d\u903b\u8f91
\n \/* fptr \u6307\u5411 field，vptr \u6307\u5411 field \u5bf9\u5e94\u7684 value（listpack \u4e2d field\/value \u6210\u5bf9\u5b58\u50a8） *\/
\n vptr = lpNext(zl, fptr);
\n serverAssert(vptr != NULL); \/\/ \u65ad\u8a00：field \u5fc5\u987b\u6709\u5bf9\u5e94\u7684 value（\u9632\u5fa1\u6027\u7f16\u7a0b）
\n update = 1; \/\/ \u6807\u8bb0\u4e3a\u66f4\u65b0\u64cd\u4f5c<\/p>\n\/* \u66ff\u6362\u539f\u6709 value：lpReplace \u4f1a\u91cd\u65b0\u5206\u914d listpack \u5185\u5b58（\u82e5\u9700\u8981），\u8fd4\u56de\u65b0\u7684 listpack \u6307\u9488 *\/
\n zl = lpReplace(zl, &vptr, (unsigned char*)value, sdslen(value));
\n }
\n }<\/p>\nif (!update) { \/\/ \u672a\u627e\u5230 field，\u6267\u884c\u201c\u65b0\u589e\u201d\u903b\u8f91
\n \/* \u5c06 field \u548c value \u4f9d\u6b21\u8ffd\u52a0\u5230 listpack \u5c3e\u90e8（\u6210\u5bf9\u5b58\u50a8） *\/
\n zl = lpAppend(zl, (unsigned char*)field, sdslen(field)); \/\/ \u8ffd\u52a0 field
\n zl = lpAppend(zl, (unsigned char*)value, sdslen(value)); \/\/ \u8ffd\u52a0 value
\n }
\n o->ptr = zl; \/\/ \u66f4\u65b0\u5bf9\u8c61\u7684 listpack \u6307\u9488（\u53ef\u80fd\u662f\u65b0\u5206\u914d\u7684\u5185\u5b58）<\/p>\n\/* \u5173\u952e：\u68c0\u67e5\u662f\u5426\u9700\u8981\u4ece LISTPACK \u8f6c\u6362\u4e3a\u54c8\u5e0c\u8868（HT）
\n * hash_max_listpack_entries \u662f\u914d\u7f6e\u9608\u503c（\u9ed8\u8ba4512），\u5143\u7d20\u6570\u8d85\u8fc7\u9608\u503c\u5219\u8f6c\u6362
\n * \u76ee\u7684：listpack \u589e\u5220\u6539\u662f O(n)，\u6570\u636e\u91cf\u5927\u65f6\u6027\u80fd\u5dee，\u8f6c\u4e3a HT（O(1) \u8bfb\u5199）
\n *\/
\n if (hashTypeLength(o) > server.hash_max_listpack_entries)
\n hashTypeConvert(o, OBJ_ENCODING_HT);
\n }
\n \/* \u5206\u652f2：\u54c8\u5e0c\u5bf9\u8c61\u5f53\u524d\u662f HT \u7f16\u7801（\u54c8\u5e0c\u8868，\u9ad8\u6548\u5b58\u50a8） *\/
\n else if (o->encoding == OBJ_ENCODING_HT) {
\n \/\/ \u5728\u54c8\u5e0c\u8868\u4e2d\u67e5\u627e field \u5bf9\u5e94\u7684\u6761\u76ee
\n dictEntry *de = dictFind(o->ptr,field);
\n if (de) { \/\/ \u627e\u5230\u6761\u76ee，\u6267\u884c\u201c\u66f4\u65b0\u201d\u903b\u8f91
\n sdsfree(dictGetVal(de)); \/\/ \u91ca\u653e\u539f\u6709 value \u7684 SDS \u5185\u5b58
\n \/\/ \u6839\u636e flags \u51b3\u5b9a\u662f\u5426\u63a5\u7ba1 value \u7684\u5185\u5b58\u6240\u6709\u6743
\n if (flags & HASH_SET_TAKE_VALUE) {
\n dictGetVal(de) = value; \/\/ \u76f4\u63a5\u590d\u7528 value \u6307\u9488（\u4e0d\u590d\u5236）
\n value = NULL; \/\/ \u6807\u8bb0 value \u5df2\u88ab\u63a5\u7ba1，\u540e\u7eed\u65e0\u9700\u91ca\u653e
\n } else {
\n dictGetVal(de) = sdsdup(value); \/\/ \u590d\u5236 value（\u4fdd\u7559\u539f value \u6240\u6709\u6743）
\n }
\n update = 1; \/\/ \u6807\u8bb0\u4e3a\u66f4\u65b0\u64cd\u4f5c
\n } else { \/\/ \u672a\u627e\u5230\u6761\u76ee，\u6267\u884c\u201c\u65b0\u589e\u201d\u903b\u8f91
\n sds f,v;
\n \/\/ \u5904\u7406 field \u7684\u5185\u5b58\u6240\u6709\u6743：\u662f\u5426\u63a5\u7ba1（\u4e0d\u590d\u5236）
\n if (flags & HASH_SET_TAKE_FIELD) {
\n f = field; \/\/ \u76f4\u63a5\u590d\u7528 field \u6307\u9488
\n field = NULL; \/\/ \u6807\u8bb0 field \u5df2\u88ab\u63a5\u7ba1
\n } else {
\n f = sdsdup(field); \/\/ \u590d\u5236 field
\n }
\n \/\/ \u5904\u7406 value \u7684\u5185\u5b58\u6240\u6709\u6743：\u662f\u5426\u63a5\u7ba1（\u4e0d\u590d\u5236）
\n if (flags & HASH_SET_TAKE_VALUE) {
\n v = value; \/\/ \u76f4\u63a5\u590d\u7528 value \u6307\u9488
\n value = NULL; \/\/ \u6807\u8bb0 value \u5df2\u88ab\u63a5\u7ba1
\n } else {
\n v = sdsdup(value); \/\/ \u590d\u5236 value
\n }
\n dictAdd(o->ptr,f,v); \/\/ \u5c06 field-value \u52a0\u5165\u54c8\u5e0c\u8868
\n }
\n }
\n \/* \u5206\u652f3：\u672a\u77e5\u7f16\u7801，\u76f4\u63a5\u5d29\u6e83（\u9632\u5fa1\u6027\u7f16\u7a0b） *\/
\n else {
\n serverPanic("Unknown hash encoding");
\n }<\/p>\n\/* \u6536\u5c3e：\u91ca\u653e\u672a\u88ab\u63a5\u7ba1\u7684 SDS \u5185\u5b58（\u907f\u514d\u5185\u5b58\u6cc4\u6f0f）
\n * \u82e5 flags \u8981\u6c42\u51fd\u6570\u63a5\u7ba1 field\/value \u6240\u6709\u6743，\u4f46\u672a\u88ab\u4f7f\u7528，\u5219\u91ca\u653e
\n *\/
\n if (flags & HASH_SET_TAKE_FIELD && field) sdsfree(field);
\n if (flags & HASH_SET_TAKE_VALUE && value) sdsfree(value);
\n return update; \/\/ \u8fd4\u56de\u662f\u5426\u662f\u66f4\u65b0\u64cd\u4f5c
\n}<\/p>\n（t_hash.c)<\/p>\n<\/p>\n
1.2 dict\u7ed3\u6784\u4f53<\/h4>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101806-6a65dede5b436.png\")
<\/p>\n（dict.h）<\/p>\n<\/p>\n
1.3 rehash<\/h4>\n
ht_table[0];\u00a0 \/\/ \u7528\u6237\u8bbf\u95ee\u7684\u6570\u636e\u7ed3\u6784<\/p>\n
ht_table[1] = null; \/\/ \u7528\u4e8e\u6e10\u8fdb\u5f0f\u6570\u636e\u8fc1\u79fb（rehashidx）<\/p>\n
\u6e10\u8fdb\u5f0f\u8fc1\u79fb<\/p>\n
- \n
- \u6cd51：\u5206\u644a\u5728\u589e\u5220\u6539\u67e5\u4e2d，\u6bcf\u6b21\u64cd\u4f5c\u5c31\u8fc1\u79fb\u4e00\u4e2a\u69fd\u4f4d<\/li>\n
- \u6cd52：redis\u7a7a\u95f2\u65f6，\u8fc1\u79fb1ms\u7684\u65f6\u95f4<\/li>\n<\/ul>\n
\u64cd\u4f5c\u5b8c\u4e4b\u540e，\u91ca\u653eht_table[0]，\u5c06\u5176\u6307\u5411\u6570\u636e\u8fc1\u79fb\u5b8c\u6bd5\u7684\u7ed3\u6784\u4f53，\u7136\u540e\u7f6eht_table[1]\u4e3anull<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101806-6a65dede818b1.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101806-6a65dedeb3f1d.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101806-6a65dededb7cc.png\")
<\/p>\n<\/p>\n2. \u5b57\u7b26\u4e32（int \u2192 embstr \u2192 raw）<\/h3>\n
- \n
- int \u7f16\u7801：\u6570\u5b57\u578b\u5b57\u7b26\u4e32\u76f4\u63a5\u5b58\u6210\u6574\u6570，\u629b\u5f03 SDS \u7ed3\u6784，\u5185\u5b58\u4ece \u201credisObject+SDS\u201d（\u226523 \u5b57\u8282）\u964d\u5230\u4ec5 redisObject（16 \u5b57\u8282），\u4e14\u6574\u6570\u8fd0\u7b97\u65e0\u9700\u89e3\u6790\u5b57\u7b26\u4e32，\u6548\u7387\u62c9\u6ee1；<\/li>\n
- embstr \u7f16\u7801：\u77ed\u5b57\u7b26\u4e32（\u226444 \u5b57\u8282）\u7528\u8fde\u7eed\u5185\u5b58\u5b58\u50a8，\u4e00\u6b21\u5206\u914d \/ \u91ca\u653e，CPU \u7f13\u5b58\u547d\u4e2d\u7387\u9ad8（64 \u5b57\u8282\u7f13\u5b58\u884c\u521a\u597d\u88c5\u4e0b），\u6bd4 raw \u5c11\u4e00\u6b21\u5185\u5b58\u7533\u8bf7；<\/li>\n
- raw \u7f16\u7801：\u957f\u5b57\u7b26\u4e32\u65e0\u6cd5\u585e\u8fdb 64 \u5b57\u8282\u7f13\u5b58\u884c，\u53ea\u80fd\u5206\u79bb\u5b58\u50a8，\u727a\u7272\u4e00\u70b9\u5185\u5b58\u6548\u7387，\u4fdd\u8bc1\u957f\u5b57\u7b26\u4e32\u7684\u8bfb\u5199\u6027\u80fd\u3002<\/li>\n<\/ul>\n
\u8bbe\u8ba1\u76ee\u7684：\u6570\u5b57 \/ \u77ed\u5b57\u7b26\u4e32\u6781\u81f4\u7701\u5185\u5b58，\u957f\u5b57\u7b26\u4e32\u4fdd\u8bc1\u529f\u80fd\u517c\u5bb9（\u6700\u5927 512MB）<\/p>\n<\/p>\n
2.1\u00a0string\u5bf9\u8c61\u7684\u6784\u5efa<\/h4>\n
\/* \u5c1d\u8bd5\u5bf9\u5b57\u7b26\u4e32\u5bf9\u8c61\u8fdb\u884c\u7f16\u7801\u4f18\u5316，\u4ee5\u8282\u7701\u5185\u5b58\u7a7a\u95f4
\n * \u6838\u5fc3\u903b\u8f91：RAW\/EMBSTR \u2192 INT（\u6570\u5b57\u578b） \u6216 \u77ed\u5b57\u7b26\u4e32\u2192EMBSTR，\u957f\u5b57\u7b26\u4e32\u4f18\u5316SDS
\n * \u8fd4\u56de\u503c：\u4f18\u5316\u540e\u7684\u5bf9\u8c61（\u53ef\u80fd\u662f\u65b0\u5bf9\u8c61，\u4e5f\u53ef\u80fd\u662f\u539f\u5bf9\u8c61）
\n *\/
\nrobj *tryObjectEncoding(robj *o) {
\n long value; \/\/ \u5b58\u50a8\u5b57\u7b26\u4e32\u8f6c\u6362\u540e\u7684\u6574\u6570\u503c
\n sds s = o->ptr; \/\/ \u53d6\u51fa\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684SDS\u6307\u9488
\n size_t len; \/\/ \u5b57\u7b26\u4e32\u957f\u5ea6<\/p>\n\/* \u65ad\u8a00：\u5f53\u524d\u5bf9\u8c61\u5fc5\u987b\u662f\u5b57\u7b26\u4e32\u7c7b\u578b（OBJ_STRING）
\n * \u8fd9\u4e2a\u51fd\u6570\u53ea\u5904\u7406\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\u7f16\u7801\u4f18\u5316，\u5176\u4ed6\u7c7b\u578b\u7531\u5404\u81ea\u7684\u547d\u4ee4\u5904\u7406
\n *\/
\n serverAssertWithInfo(NULL,o,o->type == OBJ_STRING);<\/p>\n\/* \u53ea\u5bf9 RAW\/EMBSTR \u7f16\u7801\u7684\u5b57\u7b26\u4e32\u505a\u4f18\u5316（\u8fd9\u4e24\u79cd\u7f16\u7801\u662f\u57fa\u4e8e\u5b57\u7b26\u6570\u7ec4\u7684\u539f\u59cb\u5b58\u50a8）
\n * \u5df2\u7ecf\u662fINT\u7f16\u7801\u7684\u5bf9\u8c61\u65e0\u9700\u518d\u4f18\u5316
\n *\/
\n if (!sdsEncodedObject(o)) return o;<\/p>\n\/* \u5171\u4eab\u5bf9\u8c61\u4e0d\u505a\u7f16\u7801\u4f18\u5316：
\n * \u5171\u4eab\u5bf9\u8c61（\u5982\u5171\u4eab\u6574\u6570）\u53ef\u80fd\u88ab\u6574\u4e2aRedis\u7684\u5bf9\u8c61\u7a7a\u95f4\u5f15\u7528，\u4f18\u5316\u540e\u53ef\u80fd\u5bfc\u81f4\u903b\u8f91\u5f02\u5e38
\n * \u5171\u4eab\u5bf9\u8c61\u4ec5\u4f5c\u4e3a\u952e\u7a7a\u95f4\u7684\u503c\u4f7f\u7528\u65f6\u624d\u5b89\u5168，\u56e0\u6b64\u5f15\u7528\u8ba1\u6570>1\u65f6\u76f4\u63a5\u8fd4\u56de\u539f\u5bf9\u8c61
\n *\/
\n if (o->refcount > 1) return o;<\/p>\n\/* \u7b2c\u4e00\u6b65：\u5c1d\u8bd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u957f\u6574\u6570（INT\u7f16\u7801\u4f18\u5316）
\n * \u6ce8：\u957f\u5ea6>20\u5b57\u8282\u7684\u5b57\u7b26\u4e32\u4e0d\u53ef\u80fd\u8f6c\u621032\/64\u4f4d\u6574\u6570，\u76f4\u63a5\u8df3\u8fc7
\n *\/
\n len = sdslen(s); \/\/ \u83b7\u53d6SDS\u5b57\u7b26\u4e32\u7684\u5b9e\u9645\u957f\u5ea6
\n if (len <= 20 && string2l(s,len,&value)) { \/\/ \u957f\u5ea6\u226420\u4e14\u80fd\u8f6c\u6210long\u6574\u6570
\n \/* \u5c1d\u8bd5\u4f7f\u7528\u5171\u4eab\u6574\u6570\u5bf9\u8c61（\u8fdb\u4e00\u6b65\u8282\u7701\u5185\u5b58）
\n * \u4f8b\u5916\u573a\u666f：\u5f00\u542fmaxmemory\u4e14\u7b56\u7565\u4e0d\u5141\u8bb8\u5171\u4eab\u6574\u6570\u65f6，\u4e0d\u4f7f\u7528\u5171\u4eab\u5bf9\u8c61
\n * \u539f\u56e0：LRU\u6dd8\u6c70\u7b97\u6cd5\u9700\u8981\u6bcf\u4e2a\u5bf9\u8c61\u6709\u72ec\u7acb\u7684LRU\u5b57\u6bb5，\u5171\u4eab\u5bf9\u8c61\u4f1a\u5bfc\u81f4LRU\u7edf\u8ba1\u9519\u8bef
\n *\/
\n if ((server.maxmemory == 0 ||
\n !(server.maxmemory_policy & MAXMEMORY_FLAG_NO_SHARED_INTEGERS)) &&
\n value >= 0 &&
\n value < OBJ_SHARED_INTEGERS) \/\/ OBJ_SHARED_INTEGERS\u9ed8\u8ba4\u662f10000，\u5171\u4eab0~9999\u7684\u6574\u6570
\n {
\n decrRefCount(o); \/\/ \u91ca\u653e\u539f\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570
\n incrRefCount(shared.integers[value]); \/\/ \u589e\u52a0\u5171\u4eab\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570
\n return shared.integers[value]; \/\/ \u8fd4\u56de\u5171\u4eab\u6574\u6570\u5bf9\u8c61
\n } else {
\n \/\/ \u4e0d\u6ee1\u8db3\u5171\u4eab\u6761\u4ef6\u65f6，\u76f4\u63a5\u5c06\u539f\u5bf9\u8c61\u8f6c\u4e3aINT\u7f16\u7801
\n if (o->encoding == OBJ_ENCODING_RAW) { \/\/ \u539f\u7f16\u7801\u662fRAW
\n sdsfree(o->ptr); \/\/ \u91ca\u653e\u539fSDS\u5185\u5b58
\n o->encoding = OBJ_ENCODING_INT; \/\/ \u6807\u8bb0\u4e3aINT\u7f16\u7801
\n o->ptr = (void*) value; \/\/ ptr\u4e0d\u518d\u6307\u5411SDS，\u800c\u662f\u5b58\u50a8\u6574\u6570\u503c
\n return o; \/\/ \u8fd4\u56de\u4f18\u5316\u540e\u7684\u539f\u5bf9\u8c61
\n } else if (o->encoding == OBJ_ENCODING_EMBSTR) { \/\/ \u539f\u7f16\u7801\u662fEMBSTR
\n decrRefCount(o); \/\/ \u91ca\u653e\u539fEMBSTR\u5bf9\u8c61
\n return createStringObjectFromLongLongForValue(value); \/\/ \u521b\u5efa\u65b0\u7684INT\u7f16\u7801\u5bf9\u8c61
\n }
\n }
\n }<\/p>\n\/* \u7b2c\u4e8c\u6b65：\u77ed\u5b57\u7b26\u4e32\u4f18\u5316（RAW\u2192EMBSTR）
\n * OBJ_ENCODING_EMBSTR_SIZE_LIMIT\u9ed8\u8ba4\u662f44\u5b57\u8282，\u957f\u5ea6\u226444\u7684RAW\u5b57\u7b26\u4e32\u8f6cEMBSTR
\n * EMBSTR\u7684\u4f18\u52bf：redisObject\u548cSDS\u8fde\u7eed\u5b58\u50a8，\u4e00\u6b21\u5206\u914d\/\u91ca\u653e，\u7f13\u5b58\u547d\u4e2d\u7387\u9ad8
\n *\/
\n if (len <= OBJ_ENCODING_EMBSTR_SIZE_LIMIT) {
\n robj *emb; \/\/ \u65b0\u7684EMBSTR\u7f16\u7801\u5bf9\u8c61<\/p>\nif (o->encoding == OBJ_ENCODING_EMBSTR) return o; \/\/ \u5df2\u7ecf\u662fEMBSTR，\u76f4\u63a5\u8fd4\u56de
\n emb = createEmbeddedStringObject(s,sdslen(s)); \/\/ \u521b\u5efaEMBSTR\u5bf9\u8c61
\n decrRefCount(o); \/\/ \u91ca\u653e\u539f\u5bf9\u8c61
\n return emb; \/\/ \u8fd4\u56de\u65b0\u7684EMBSTR\u5bf9\u8c61
\n }<\/p>\n\/* \u7b2c\u4e09\u6b65：\u957f\u5b57\u7b26\u4e32SDS\u4f18\u5316（\u65e0\u6cd5\u8f6cINT\/EMBSTR\u65f6）
\n * \u5982\u679cSDS\u5c3e\u90e8\u6709\u8d85\u8fc710%\u7684\u7a7a\u95f2\u7a7a\u95f4，\u88c1\u526aSDS\u4ee5\u8282\u7701\u5185\u5b58
\n * \u4ec5\u5bf9\u957f\u5ea6>44\u5b57\u8282\u7684\u5b57\u7b26\u4e32\u505a\u6b64\u4f18\u5316（\u56e0\u4e3a\u524d\u9762\u5df2\u7ecf\u5904\u7406\u4e86\u77ed\u5b57\u7b26\u4e32）
\n *\/
\n trimStringObjectIfNeeded(o);<\/p>\n\/* \u65e0\u6cd5\u505a\u4efb\u4f55\u7f16\u7801\u4f18\u5316，\u8fd4\u56de\u539f\u5bf9\u8c61 *\/
\n return o;
\n}<\/p>\n（object.c）<\/p>\n<\/p>\n
2.2 redisObject\u7ed3\u6784\u4f53<\/h4>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101807-6a65dedf0b0dd.png\")
<\/p>\n（server.h，LRU_BITS\u4e3a24 : \u7ed3\u6784\u4f53\u536016\u5b57\u8282）<\/p>\n<\/p>\n
2.3\u00a0int\u5f62\u5f0f：\u5f53string\u4e3a\u7eaf\u6570\u5b57\u65f6（\u53ef\u4ee5\u542b+-\u53f7）\u4e14\u957f\u5ea6 <= 20\u4f4d\u3002<\/h4>\n
64 \u4f4d\u7cfb\u7edf\u4e2d void *ptr \u672c\u8eab\u5360 8 \u5b57\u8282，\u4f46\u5728 int \u7f16\u7801\u65f6，Redis \u628a ptr \u5f53\u4f5c long long \u7c7b\u578b（\u4e5f\u662f 8 \u5b57\u8282）\u6765\u7528，\u800c\u975e\u6307\u9488：<\/p>\n
- \n
- long long \u7684\u53d6\u503c\u8303\u56f4\u662f -9223372036854775808 ~ 9223372036854775807；<\/li>\n
- \u8fd9\u4e2a\u8303\u56f4\u5bf9\u5e94\u7684\u5341\u8fdb\u5236\u6570\u5b57\u7684\u6700\u5927\u957f\u5ea6\u662f 19 \u4f4d（\u6bd4\u5982 9223372036854775807 \u662f 19 \u4f4d），\u52a0\u4e0a\u6b63\u8d1f\u53f7\u5c31\u662f 20 \u4f4d<\/li>\n<\/ul>\n
2.4\u00a0embstr\u5f62\u5f0f<\/h4>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101807-6a65dedf247cf.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101807-6a65dedf30dde.png\")
<\/p>\n（sds.h, \u7ed3\u6784\u4f53\u53603\u5b57\u8282）<\/p>\n<\/p>\n
2.5.\u00a0raw\u7f16\u7801\u5219\u662fredisObject\u4e2d\u6210\u5458ptr\u6307\u5411\u4e00\u5757\u53e6\u5916\u5206\u914d\u7684\u5185\u5b58\u7a7a\u95f4<\/h4>\n<\/p>\n
2.6 \u603b\u7ed3<\/h4>\n
- \n
- \u5c0f\u4e8e20\u5b57\u8282\u4e14\u4e3a\u6570\u5b57\u65f6，\u9009\u62e9int\u7f16\u7801\u3002<\/li>\n
- \u5927\u4e8e20\u5b57\u8282\u5c0f\u4e8e44\u5b57\u8282，\u9009\u62e9embstr\u7f16\u7801\u3002\u5927\u4e8e44\u5b57\u8282，\u9009\u62e9raw\u7f16\u7801<\/li>\n
- embstr：\u5d4c\u5165\u5b57\u7b26\u4e32，\u5d4c\u5165\u5230redisObject\u4e2d，\u800craw\u5c31\u662f\u5728redisObject\u4e2d\u7ef4\u6301\u4e00\u4e2a\u6307\u5411\u5806\u4e0a\u7684\u8d44\u6e90<\/li>\n
- cpu cache line\u6700\u5c0f\u8bbf\u95ee\u5355\u4f4d\u4e3a64\u5b57\u8282，\u6240\u4ee5\u9009\u62e964\u4e2a\u5b57\u8282\u4f5c\u4e3a\u5206\u754c\u7ebf\u3002<\/li>\n
- 20\u5b57\u8282\u4e3a\u754c\u7684\u539f\u56e0：long long int \u8868\u793a\u7684\u6570\u5b57\u8303\u56f4：-19\u4f4d ~ +19\u4f4d，\u5373\u957f\u5ea6\u4e3a20\u7684\u5b57\u7b26\u4e32<\/li>\n
- 44\u5b57\u8282\u4e3a\u754c\u7684\u539f\u56e0：buf\u53ef\u7528\u7a7a\u95f4\u4e3a：64-16-3-1 = 44\u3002 （\u8fd9\u4e2a1\u4f5c\u4e3a'\\\\0'，\u4ee5\u4fbf\u517c\u5bb9c\u7684\u5b57\u7b26\u4e32\u5e93\u51fd\u6570）<\/li>\n<\/ul>\n
3. \u5217\u8868（quicklist \u5c01\u88c5 ziplist）<\/h3>\n
- \n
- \u65e9\u671f Redis \u5217\u8868\u7528 ziplist（\u5c0f\u5217\u8868）\u548c linkedlist（\u5927\u5217\u8868），\u4f46 linkedlist \u6bcf\u4e2a\u8282\u70b9\u6709\u6307\u9488\u5f00\u9500，\u5185\u5b58\u6548\u7387\u4f4e；<\/li>\n
- \u73b0\u5728\u6539\u7528 quicklist（\u53cc\u5411\u94fe\u8868 + \u6bcf\u4e2a\u8282\u70b9\u662f ziplist）：\n
- \n
- \u65e2\u4fdd\u7559\u4e86 ziplist \u7684\u5185\u5b58\u7d27\u51d1\u6027（\u6bcf\u4e2a\u8282\u70b9\u5185\u7684\u5143\u7d20\u8fde\u7eed\u5b58\u50a8）；<\/li>\n
- \u53c8\u907f\u514d\u4e86\u7eaf ziplist \u91cd\u6392\u5185\u5b58\u7684\u6027\u80fd\u95ee\u9898（\u589e\u5220\u53ea\u5f71\u54cd\u5355\u4e2a ziplist \u8282\u70b9，\u800c\u975e\u6574\u4e2a\u5217\u8868）\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u8bbe\u8ba1\u76ee\u7684：\u5e73\u8861\u5185\u5b58\u6548\u7387\u548c\u589e\u5220\u6027\u80fd，\u662f\u5bf9\u4f20\u7edf ziplist\/linkedlist \u7684\u4f18\u5316\u5347\u7ea7\u3002<\/p>\n
\u6838\u5fc3\u8bf4\u660e<\/h4>\n
- \n
- list \u7684\u5e95\u5c42\u7f16\u7801\u662f quicklist（\u53cc\u5411\u94fe\u8868），\u800c quicklist \u7684\u6bcf\u4e2a\u8282\u70b9\u53c8\u662f\u4e00\u4e2a ziplist（\u538b\u7f29\u5217\u8868\u8282\u70b9）；<\/li>\n
- \u56e0\u6b64，list \u5e76\u4e0d\u76f4\u63a5\u8f6c\u6362\u4e3a ziplist，\u800c\u662f quicklist \u5185\u90e8\u95f4\u63a5\u4f7f\u7528 ziplist \u6765\u5b58\u50a8\u6bcf\u4e2a\u8282\u70b9\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n
\/* ========================== 1. quicklist \u7ed3\u6784\u4f53（\u5217\u8868\u7684\u9876\u5c42\u7ed3\u6784）==========================
\n * \u8bf4\u660e：Redis\u5217\u8868(List)\u7684\u5e95\u5c42\u5b9e\u73b0，\u662f\u300c\u53cc\u5411\u94fe\u8868 + \u6bcf\u4e2a\u8282\u70b9\u5185\u5d4c listpack\u300d\u7684\u6df7\u5408\u7ed3\u6784，
\n * \u66ff\u4ee3\u4e86\u65e9\u671f\u7684 ziplist（\u5c0f\u5217\u8868）\u548c linkedlist（\u5927\u5217\u8868），\u5e73\u8861\u5185\u5b58\u6548\u7387\u548c\u589e\u5220\u6027\u80fd
\n *\/
\ntypedef struct quicklist {
\n quicklistNode *head; \/\/ \u6307\u5411\u53cc\u5411\u94fe\u8868\u7684\u5934\u8282\u70b9
\n quicklistNode *tail; \/\/ \u6307\u5411\u53cc\u5411\u94fe\u8868\u7684\u5c3e\u8282\u70b9
\n unsigned long count; \/\/ \u6240\u6709\u8282\u70b9\u4e2d listpack \u5b58\u50a8\u7684**\u603b\u5143\u7d20\u6570**（\u5feb\u901f\u83b7\u53d6\u5217\u8868\u957f\u5ea6，\u65e0\u9700\u904d\u5386\u8282\u70b9）
\n unsigned long len; \/\/ \u53cc\u5411\u94fe\u8868\u4e2d quicklistNode \u7684**\u8282\u70b9\u603b\u6570**
\n signed int fill : QL_FILL_BITS; \/\/ \u4f4d\u57df（QL_FILL_BITS \u901a\u5e38\u662f16\u4f4d）：\u63a7\u5236\u6bcf\u4e2a\u8282\u70b9\u7684 listpack \u586b\u5145\u56e0\u5b50
\n \/\/ \u5bf9\u5e94\u914d\u7f6e\u9879 list-max-ziplist-size，\u6bd4\u5982-1=\u6700\u591a4KB，-2=\u6700\u591a8KB，1=\u6700\u591a1\u4e2a\u5143\u7d20\u7b49
\n unsigned int compress : QL_COMP_BITS; \/\/ \u4f4d\u57df（QL_COMP_BITS \u901a\u5e38\u662f16\u4f4d）：\u63a7\u5236\u5217\u8868\u7684\u538b\u7f29\u6df1\u5ea6
\n \/\/ \u5bf9\u5e94\u914d\u7f6e\u9879 list-compress-depth，0=\u4e0d\u538b\u7f29，1=\u9996\u5c3e\u54041\u4e2a\u8282\u70b9\u4e0d\u538b\u7f29，\u5176\u4f59\u538b\u7f29，\u4ee5\u6b64\u7c7b\u63a8
\n unsigned int bookmark_count: QL_BM_BITS; \/\/ \u4f4d\u57df（QL_BM_BITS \u901a\u5e38\u662f3\u4f4d）：\u4e66\u7b7e\u7684\u6570\u91cf，\u7528\u4e8e\u5feb\u901f\u5b9a\u4f4d\u8282\u70b9
\n quicklistBookmark bookmarks[]; \/\/ \u67d4\u6027\u6570\u7ec4：\u5b58\u50a8\u4e66\u7b7e（\u4f18\u5316\u5927\u5217\u8868\u7684\u968f\u673a\u8bbf\u95ee\u6027\u80fd，\u907f\u514d\u904d\u5386\u6574\u4e2a\u94fe\u8868）
\n} quicklist;<\/p>\n\/* ========================== 2. quicklistNode \u7ed3\u6784\u4f53（\u5217\u8868\u7684\u8282\u70b9\u7ed3\u6784）==========================
\n * \u8bf4\u660e：quicklist \u7684\u6bcf\u4e2a\u8282\u70b9，\u5185\u90e8\u5c01\u88c5\u4e86 listpack（\u7d27\u51d1\u5b58\u50a8\u7ed3\u6784，\u66ff\u4ee3\u65e7\u7684 ziplist），
\n * \u652f\u6301\u538b\u7f29（LZF\u7b97\u6cd5），\u517c\u987e\u5185\u5b58\u6548\u7387\u548c\u8bbf\u95ee\u6027\u80fd
\n *\/
\ntypedef struct quicklistNode {
\n struct quicklistNode *prev; \/\/ \u6307\u5411\u53cc\u5411\u94fe\u8868\u7684\u524d\u4e00\u4e2a\u8282\u70b9
\n struct quicklistNode *next; \/\/ \u6307\u5411\u53cc\u5411\u94fe\u8868\u7684\u540e\u4e00\u4e2a\u8282\u70b9
\n unsigned char *entry; \/\/ \u6307\u5411\u5b9e\u9645\u5b58\u50a8\u6570\u636e\u7684\u6307\u9488：
\n \/\/ – \u672a\u538b\u7f29\u65f6：\u6307\u5411 listpack \u7ed3\u6784
\n \/\/ – \u538b\u7f29\u65f6：\u6307\u5411 LZF \u538b\u7f29\u540e\u7684\u6570\u636e
\n size_t sz; \/\/ entry \u6307\u5411\u6570\u636e\u7684**\u603b\u5b57\u8282\u6570**（\u65b9\u4fbf\u5185\u5b58\u5206\u914d\/\u91ca\u653e\/\u538b\u7f29\u8ba1\u7b97）
\n unsigned int count : 16; \/\/ \u4f4d\u57df（16\u4f4d）：\u5f53\u524d\u8282\u70b9\u7684 listpack \u4e2d\u5b58\u50a8\u7684**\u5143\u7d20\u4e2a\u6570**（\u6700\u592765535\u4e2a）
\n unsigned int encoding : 2; \/\/ \u4f4d\u57df（2\u4f4d）：\u5f53\u524d\u8282\u70b9\u7684\u7f16\u7801\u65b9\u5f0f
\n \/\/ 1=RAW（\u672a\u538b\u7f29，\u76f4\u63a5\u5b58\u50a8 listpack）
\n \/\/ 2=LZF（\u7528 LZF \u7b97\u6cd5\u538b\u7f29 listpack，\u8282\u7701\u5185\u5b58）
\n unsigned int container : 2; \/\/ \u4f4d\u57df（2\u4f4d）：\u5f53\u524d\u8282\u70b9\u7684\u6570\u636e\u5bb9\u5668\u7c7b\u578b
\n \/\/ 1=PLAIN（\u65e9\u671f\u7684\u666e\u901a\u5b58\u50a8，\u5df2\u5e9f\u5f03）
\n \/\/ 2=PACKED（\u5f53\u524d\u552f\u4e00\u4f7f\u7528\u7684\u7c7b\u578b，\u5373\u4f7f\u7528 listpack \u5b58\u50a8\u6570\u636e）
\n unsigned int recompress : 1; \/\/ \u4f4d\u57df（1\u4f4d）：\u6807\u8bb0\u8be5\u8282\u70b9**\u4e4b\u524d\u662f\u5426\u88ab\u538b\u7f29\u8fc7**
\n \/\/ \u5f53\u9700\u8981\u8bbf\u95ee\u538b\u7f29\u8282\u70b9\u65f6，\u4f1a\u4e34\u65f6\u89e3\u538b，\u8bbf\u95ee\u5b8c\u6210\u540e\u9700\u8981\u91cd\u65b0\u538b\u7f29
\n unsigned int attempted_compress : 1; \/\/ \u4f4d\u57df（1\u4f4d）：\u6807\u8bb0\u8be5\u8282\u70b9**\u5c1d\u8bd5\u8fc7\u538b\u7f29\u4f46\u5931\u8d25**
\n \/\/ \u539f\u56e0\u662f\u8282\u70b9\u6570\u636e\u592a\u5c0f，\u538b\u7f29\u540e\u53cd\u800c\u4f1a\u589e\u52a0\u5185\u5b58\u5f00\u9500
\n unsigned int extra : 10; \/\/ \u4f4d\u57df（10\u4f4d）：\u9884\u7559\u4f4d，\u7528\u4e8e\u672a\u6765\u6269\u5c55\u529f\u80fd（Redis \u9884\u7559\u4f4d\u7684\u5e38\u89c4\u64cd\u4f5c）
\n} quicklistNode;<\/p>\n（quicklist.h)\u3002\u6bcf\u4e2a quicklistNode \u5185\u90e8\u5305\u542b\u4e00\u4e2a ziplist，\u7528\u4e8e\u5b58\u50a8\u5b9e\u9645\u6570\u636e，\u8fd9\u5c31\u662f \u201c\u95f4\u63a5\u4f7f\u7528 ziplist\u201d \u7684\u542b\u4e49\u3002<\/p>\n<\/p>\n
4. \u96c6\u5408（intset \u2192 dict）<\/h3>\n
- \n
- intset（\u6574\u6570\u96c6\u5408）：\n
- \n
- \u5185\u5b58\u4e0a：\u8fde\u7eed\u5b58\u50a8\u6574\u6570，\u65e0\u4efb\u4f55\u5197\u4f59（\u6bd4\u5982\u5b58\u50a8 1,2,3 \u53ea\u5360 3\u00d78=24 \u5b57\u8282），\u800c dict \u5b58\u50a8\u540c\u6837\u6570\u636e\u9700\u8981\u54c8\u5e0c\u8868 + \u6307\u9488，\u81f3\u5c11\u5360\u4e0a\u767e\u5b57\u8282；<\/li>\n
- \u9650\u5236：\u53ea\u80fd\u5b58\u6574\u6570，\u4e14\u589e\u5220\u9700\u8981\u91cd\u6392\u5185\u5b58；<\/li>\n<\/ul>\n<\/li>\n
- dict：\n
- \n
- \u5185\u5b58\u4e0a：\u6709\u54c8\u5e0c\u8868\u5f00\u9500，\u4f46\u652f\u6301\u4efb\u610f\u5b57\u7b26\u4e32\u5143\u7d20；<\/li>\n
- \u6027\u80fd\u4e0a：\u589e\u5220\u67e5 O (1)，\u65e0\u7c7b\u578b\u9650\u5236\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u8bbe\u8ba1\u76ee\u7684：\u7eaf\u6574\u6570\u5c0f\u96c6\u5408\u7528 intset \u7701\u5185\u5b58，\u975e\u6574\u6570 \/ \u5927\u96c6\u5408\u7528 dict \u4fdd\u8bc1\u901a\u7528\u6027\u548c\u6027\u80fd（\u6bd4\u5982\u7528\u6237\u6807\u7b7e\u96c6\u5408，\u53ef\u80fd\u5b58\u5b57\u7b26\u4e32\u6807\u7b7e，\u53ea\u80fd\u7528 dict）\u3002<\/p>\n<\/p>\n
5. \u6709\u5e8f\u96c6\u5408<\/h3>\n
- \n
- ziplist（\u538b\u7f29\u5217\u8868）：\n
- \n
- \u5185\u5b58\u4e0a：\u6240\u6709\u952e\u503c\u5bf9 \/ \u5143\u7d20\u8fde\u7eed\u5b58\u50a8，\u65e0\u5197\u4f59\u6307\u9488（dict \u6bcf\u4e2a\u952e\u503c\u5bf9\u8981\u5b58\u4e24\u4e2a\u6307\u9488，skiplist \u6bcf\u4e2a\u8282\u70b9\u6709\u591a\u5c42\u6307\u9488），\u5185\u5b58\u5bc6\u5ea6\u662f dict \u7684 1\/5 \u4ee5\u4e0a；<\/li>\n
- \u6027\u80fd\u4e0a：\u589e\u5220\u6539\u9700\u8981\u91cd\u6392\u6574\u4e2a\u5217\u8868（O (n)），\u4f46\u6570\u636e\u91cf\u5c0f（\u2264512\/128 \u4e2a\u5143\u7d20）\u65f6，n \u5f88\u5c0f，\u6027\u80fd\u635f\u8017\u53ef\u5ffd\u7565；<\/li>\n<\/ul>\n<\/li>\n
- skiplist：\n
- \n
- \u5185\u5b58\u4e0a：skiplist \u6709\u591a\u5c42\u6307\u9488\u5f00\u9500，\u5185\u5b58\u5360\u7528\u662f ziplist \u7684\u6570\u500d；<\/li>\n
- \u6027\u80fd\u4e0a：skiplist \u67e5\u6539 O (logN)，\u6570\u636e\u91cf\u5927\u65f6\u8fdc\u5feb\u4e8e ziplist \u7684 O (n)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u8bbe\u8ba1\u76ee\u7684\u00a0\u5c0f\u6709\u5e8f\u96c6\u5408\u7528 ziplist \u7701\u5185\u5b58 \u5927\u6709\u5e8f\u96c6\u5408\u7528 skiplist \u4fdd\u8bc1\u8bfb\u5199\u6027\u80fd（\u6bd4\u5982\u7535\u5546\u573a\u666f\u7684\u5546\u54c1\u6392\u884c\u699c zset，\u6570\u636e\u91cf\u53d8\u5927\u540e，skiplist \u7684\u6392\u5e8f\u6548\u7387\u8fdc\u9ad8\u4e8e ziplist）<\/p>\n<\/p>\n
\/* \u5411\u6709\u5e8f\u96c6\u5408\u4e2d\u6dfb\u52a0\/\u66f4\u65b0\u5143\u7d20（\u6838\u5fc3\u51fd\u6570）
\n * \u53c2\u6570\u8bf4\u660e：
\n * zobj: \u76ee\u6807\u6709\u5e8f\u96c6\u5408\u5bf9\u8c61（robj \u7c7b\u578b）
\n * score: \u5143\u7d20\u7684\u5206\u6570（double \u7c7b\u578b）
\n * ele: \u5143\u7d20\u503c（SDS \u5b57\u7b26\u4e32）
\n * in_flags: \u8f93\u5165\u63a7\u5236\u6807\u5fd7（\u5982 ZADD_IN_INCR\/XX\/NX\/GT\/LT \u7b49）
\n * out_flags: \u8f93\u51fa\u6807\u5fd7（\u8fd4\u56de\u64cd\u4f5c\u7ed3\u679c，\u5982\u662f\u5426\u65b0\u589e\/\u66f4\u65b0\/NaN \u7b49）
\n * newscore: \u8f93\u51fa\u53c2\u6570，\u8fd4\u56de\u66f4\u65b0\u540e\u7684\u5206\u6570（NULL \u5219\u4e0d\u8fd4\u56de）
\n * \u8fd4\u56de\u503c：1 \u8868\u793a\u64cd\u4f5c\u6210\u529f（\u65b0\u589e\/\u66f4\u65b0），0 \u8868\u793a\u5931\u8d25（\u5982 NaN \u8f93\u5165）
\n *\/
\nint zsetAdd(robj *zobj, double score, sds ele, int in_flags, int *out_flags, double *newscore) {
\n \/* \u5c06\u8f93\u5165\u6807\u5fd7\u89e3\u6790\u4e3a\u6613\u68c0\u67e5\u7684\u53d8\u91cf *\/
\n int incr = (in_flags & ZADD_IN_INCR) != 0; \/\/ \u662f\u5426\u662f\u589e\u91cf\u66f4\u65b0（\u5bf9\u5e94 ZINCRBY \u6216 ZADD INCR）
\n int nx = (in_flags & ZADD_IN_NX) != 0; \/\/ \u4ec5\u5f53\u5143\u7d20\u4e0d\u5b58\u5728\u65f6\u6dfb\u52a0（ZADD NX）
\n int xx = (in_flags & ZADD_IN_XX) != 0; \/\/ \u4ec5\u5f53\u5143\u7d20\u5b58\u5728\u65f6\u66f4\u65b0（ZADD XX）
\n int gt = (in_flags & ZADD_IN_GT) != 0; \/\/ \u4ec5\u5f53\u65b0\u5206\u6570 > \u65e7\u5206\u6570\u65f6\u66f4\u65b0（ZADD GT）
\n int lt = (in_flags & ZADD_IN_LT) != 0; \/\/ \u4ec5\u5f53\u65b0\u5206\u6570 < \u65e7\u5206\u6570\u65f6\u66f4\u65b0（ZADD LT）
\n *out_flags = 0; \/* \u521d\u59cb\u5316\u8f93\u51fa\u6807\u5fd7 *\/
\n double curscore; \/\/ \u5b58\u50a8\u5143\u7d20\u5f53\u524d\u7684\u5206\u6570（\u82e5\u5b58\u5728）<\/p>\n\/* \u8f93\u5165\u5206\u6570\u662f NaN \u76f4\u63a5\u8fd4\u56de\u9519\u8bef（NaN \u65e0\u6cd5\u6bd4\u8f83，\u4e0d\u80fd\u4f5c\u4e3a\u6709\u5e8f\u96c6\u5408\u5206\u6570） *\/
\n if (isnan(score)) {
\n *out_flags = ZADD_OUT_NAN; \/\/ \u6807\u8bb0\u8f93\u51fa\u4e3a NaN \u9519\u8bef
\n return 0;
\n }<\/p>\n\/* \u5206\u652f1：\u6709\u5e8f\u96c6\u5408\u5f53\u524d\u662f LISTPACK \u7f16\u7801（\u7d27\u51d1\u5b58\u50a8，\u66ff\u4ee3\u65e7\u7684 ziplist） *\/
\n if (zobj->encoding == OBJ_ENCODING_LISTPACK) {
\n unsigned char *eptr; \/\/ \u6307\u5411 listpack \u4e2d\u5143\u7d20\u7684\u6307\u9488<\/p>\n\/* \u67e5\u627e\u5143\u7d20：\u5b58\u5728\u5219\u8fd4\u56de\u5143\u7d20\u6307\u9488\u5e76\u586b\u5145 curscore，\u4e0d\u5b58\u5728\u5219\u8fd4\u56de NULL *\/
\n if ((eptr = zzlFind(zobj->ptr,ele,&curscore)) != NULL) {
\n \/* NX \u6a21\u5f0f：\u5143\u7d20\u5df2\u5b58\u5728，\u76f4\u63a5\u8fd4\u56de（\u6807\u8bb0\u4e3a\u201c\u65e0\u64cd\u4f5c\u201d） *\/
\n if (nx) {
\n *out_flags |= ZADD_OUT_NOP;
\n return 1;
\n }<\/p>\n\/* INCR \u6a21\u5f0f：\u8ba1\u7b97\u589e\u91cf\u540e\u7684\u65b0\u5206\u6570（score = \u65e7\u5206\u6570 + \u8f93\u5165\u589e\u91cf） *\/
\n if (incr) {
\n score += curscore;
\n if (isnan(score)) { \/\/ \u589e\u91cf\u540e\u51fa\u73b0 NaN，\u8fd4\u56de\u9519\u8bef
\n *out_flags |= ZADD_OUT_NAN;
\n return 0;
\n }
\n }<\/p>\n\/* GT\/LT \u6a21\u5f0f：\u4ec5\u5f53\u65b0\u5206\u6570\u6ee1\u8db3\u6761\u4ef6\u65f6\u66f4\u65b0 *\/
\n if ((lt && score >= curscore) || (gt && score <= curscore)) {
\n *out_flags |= ZADD_OUT_NOP; \/\/ \u4e0d\u6ee1\u8db3\u6761\u4ef6，\u6807\u8bb0\u65e0\u64cd\u4f5c
\n return 1;
\n }<\/p>\n\/* \u82e5\u9700\u8981\u8fd4\u56de\u65b0\u5206\u6570，\u586b\u5145 newscore *\/
\n if (newscore) *newscore = score;<\/p>\n\/* \u5206\u6570\u53d8\u5316\u65f6：\u5148\u5220\u9664\u65e7\u5143\u7d20，\u518d\u63d2\u5165\u65b0\u5206\u6570\u7684\u5143\u7d20（listpack \u662f\u6709\u5e8f\u7ed3\u6784，\u9700\u91cd\u6392） *\/
\n if (score != curscore) {
\n zobj->ptr = zzlDelete(zobj->ptr,eptr); \/\/ \u5220\u9664\u65e7\u5143\u7d20
\n zobj->ptr = zzlInsert(zobj->ptr,ele,score); \/\/ \u63d2\u5165\u65b0\u5206\u6570\u7684\u5143\u7d20
\n *out_flags |= ZADD_OUT_UPDATED; \/\/ \u6807\u8bb0\u4e3a\u201c\u66f4\u65b0\u64cd\u4f5c\u201d
\n }
\n return 1;
\n } else if (!xx) { \/\/ \u5143\u7d20\u4e0d\u5b58\u5728，\u4e14\u4e0d\u662f XX \u6a21\u5f0f（\u6267\u884c\u65b0\u589e\u903b\u8f91）
\n \/* \u65b0\u589e\u524d\u68c0\u67e5：\u662f\u5426\u9700\u8981\u4ece LISTPACK \u8f6c\u4e3a SKIPLIST
\n * \u89e6\u53d1\u6761\u4ef6：
\n * 1. \u5143\u7d20\u6570+1 \u8d85\u8fc7 zset_max_listpack_entries（\u9ed8\u8ba4128）
\n * 2. \u5143\u7d20\u957f\u5ea6\u8d85\u8fc7 zset_max_listpack_value（\u9ed8\u8ba464）
\n * 3. listpack \u5269\u4f59\u7a7a\u95f4\u4e0d\u8db3\u4ee5\u6dfb\u52a0\u65b0\u5143\u7d20
\n *\/
\n if (zzlLength(zobj->ptr)+1 > server.zset_max_listpack_entries ||
\n sdslen(ele) > server.zset_max_listpack_value ||
\n !lpSafeToAdd(zobj->ptr, sdslen(ele)))
\n {
\n zsetConvert(zobj,OBJ_ENCODING_SKIPLIST); \/\/ \u8f6c\u6362\u4e3a SKIPLIST \u7f16\u7801
\n } else {
\n \/\/ \u65e0\u9700\u8f6c\u6362，\u76f4\u63a5\u63d2\u5165\u65b0\u5143\u7d20\u5230 listpack
\n zobj->ptr = zzlInsert(zobj->ptr,ele,score);
\n if (newscore) *newscore = score;
\n *out_flags |= ZADD_OUT_ADDED; \/\/ \u6807\u8bb0\u4e3a\u201c\u65b0\u589e\u64cd\u4f5c\u201d
\n return 1;
\n }
\n } else { \/\/ \u5143\u7d20\u4e0d\u5b58\u5728，\u4f46\u662f XX \u6a21\u5f0f（\u4ec5\u66f4\u65b0\u5df2\u5b58\u5728\u5143\u7d20）
\n *out_flags |= ZADD_OUT_NOP; \/\/ \u6807\u8bb0\u65e0\u64cd\u4f5c
\n return 1;
\n }
\n }<\/p>\n\/* \u6ce8：\u4e0a\u9762\u7684 listpack \u5206\u652f\u8981\u4e48\u5df2\u8fd4\u56de，\u8981\u4e48\u5df2\u5c06\u5bf9\u8c61\u8f6c\u4e3a skiplist \u7f16\u7801 *\/
\n \/* \u5206\u652f2：\u6709\u5e8f\u96c6\u5408\u5f53\u524d\u662f SKIPLIST \u7f16\u7801（\u9ad8\u6548\u5b58\u50a8，\u5305\u542b dict + skiplist） *\/
\n if (zobj->encoding == OBJ_ENCODING_SKIPLIST) {
\n zset *zs = zobj->ptr; \/\/ zset \u7ed3\u6784\u4f53（\u5305\u542b dict + skiplist）
\n zskiplistNode *znode; \/\/ \u8df3\u8868\u8282\u70b9\u6307\u9488
\n dictEntry *de; \/\/ \u54c8\u5e0c\u8868\u6761\u76ee\u6307\u9488<\/p>\n\/* \u5728 dict \u4e2d\u67e5\u627e\u5143\u7d20（dict \u7528\u4e8e\u5feb\u901f\u5b9a\u4f4d\u5143\u7d20\u662f\u5426\u5b58\u5728） *\/
\n de = dictFind(zs->dict,ele);
\n if (de != NULL) { \/\/ \u5143\u7d20\u5b58\u5728，\u6267\u884c\u66f4\u65b0\u903b\u8f91
\n \/* NX \u6a21\u5f0f：\u5143\u7d20\u5df2\u5b58\u5728，\u8fd4\u56de\u65e0\u64cd\u4f5c *\/
\n if (nx) {
\n *out_flags |= ZADD_OUT_NOP;
\n return 1;
\n }<\/p>\ncurscore = *(double*)dictGetVal(de); \/\/ \u83b7\u53d6\u5f53\u524d\u5206\u6570（dict \u4e2d\u5b58\u7684\u662f\u5206\u6570\u6307\u9488）<\/p>\n
\/* INCR \u6a21\u5f0f：\u8ba1\u7b97\u589e\u91cf\u540e\u7684\u65b0\u5206\u6570 *\/
\n if (incr) {
\n score += curscore;
\n if (isnan(score)) {
\n *out_flags |= ZADD_OUT_NAN;
\n return 0;
\n }
\n }<\/p>\n\/* GT\/LT \u6a21\u5f0f：\u68c0\u67e5\u5206\u6570\u6761\u4ef6 *\/
\n if ((lt && score >= curscore) || (gt && score <= curscore)) {
\n *out_flags |= ZADD_OUT_NOP;
\n return 1;
\n }<\/p>\n\/* \u586b\u5145\u65b0\u5206\u6570（\u82e5\u9700\u8981\u8fd4\u56de） *\/
\n if (newscore) *newscore = score;<\/p>\n\/* \u5206\u6570\u53d8\u5316\u65f6：\u66f4\u65b0\u8df3\u8868\u4e2d\u7684\u5206\u6570 *\/
\n if (score != curscore) {
\n \/\/ \u66f4\u65b0\u8df3\u8868\u8282\u70b9\u7684\u5206\u6570（\u5185\u90e8\u4f1a\u5220\u9664\u65e7\u8282\u70b9+\u63d2\u5165\u65b0\u8282\u70b9）
\n znode = zslUpdateScore(zs->zsl,curscore,ele,score);
\n \/* \u6ce8：dict \u4e2d\u65e0\u9700\u5220\u9664\u65e7\u6761\u76ee，\u4ec5\u66f4\u65b0\u5206\u6570\u6307\u9488\u5373\u53ef *\/
\n dictGetVal(de) = &znode->score; \/\/ \u66f4\u65b0 dict \u4e2d\u7684\u5206\u6570\u6307\u9488
\n *out_flags |= ZADD_OUT_UPDATED; \/\/ \u6807\u8bb0\u4e3a\u66f4\u65b0
\n }
\n return 1;
\n } else if (!xx) { \/\/ \u5143\u7d20\u4e0d\u5b58\u5728，\u4e14\u4e0d\u662f XX \u6a21\u5f0f（\u6267\u884c\u65b0\u589e\u903b\u8f91）
\n ele = sdsdup(ele); \/\/ \u590d\u5236\u5143\u7d20（\u63a5\u7ba1\u5185\u5b58\u6240\u6709\u6743）
\n znode = zslInsert(zs->zsl,score,ele); \/\/ \u63d2\u5165\u8df3\u8868
\n \/\/ \u5c06\u5143\u7d20\u548c\u5206\u6570\u6307\u9488\u52a0\u5165 dict（\u4fdd\u8bc1 O(1) \u67e5\u627e）
\n serverAssert(dictAdd(zs->dict,ele,&znode->score) == DICT_OK);
\n *out_flags |= ZADD_OUT_ADDED; \/\/ \u6807\u8bb0\u4e3a\u65b0\u589e
\n if (newscore) *newscore = score;
\n return 1;
\n } else { \/\/ \u5143\u7d20\u4e0d\u5b58\u5728，\u4f46\u662f XX \u6a21\u5f0f
\n *out_flags |= ZADD_OUT_NOP;
\n return 1;
\n }
\n } else {
\n \/\/ \u672a\u77e5\u7f16\u7801，\u76f4\u63a5\u5d29\u6e83（\u9632\u5fa1\u6027\u7f16\u7a0b）
\n serverPanic("Unknown sorted set encoding");
\n }
\n return 0; \/* \u6c38\u8fdc\u4e0d\u4f1a\u6267\u884c\u5230\u8fd9\u91cc（\u4e0a\u9762\u5206\u652f\u5df2\u8986\u76d6\u6240\u6709\u60c5\u51b5） *\/
\n}<\/p>\n（t_zet.c)<\/p>\n<\/p>\n
6. \u603b\u7ed3：<\/h3>\n
\u8df3\u8868redis\u9009\u62e9\u91c7\u752832\u5c42，\u517c\u987e\u5185\u5b58\u5360\u7528\u548c\u67e5\u627e\u6548\u7387\u7684\u7efc\u5408\u8003\u91cf\u3002<\/p>\n
\n
\u6570\u636e\u7c7b\u578b\u7f16\u7801\u8f6c\u6362\u903b\u8f91\u6838\u5fc3\u914d\u7f6e\u5b8f\u5b9a\u4e49\u8f6c\u6362\u89e6\u53d1\u51fd\u6570\u4e3b\u8981\u5b9e\u73b0\u6587\u4ef6<\/tr>\n \n\n zset<\/td>\n ziplist \u2194 skiplist<\/td>\n zset_max_ziplist_entries, zset_max_ziplist_value<\/td>\n zsetConvert<\/td>\n t_zset.c<\/td>\n<\/tr>\n \n set<\/td>\n intset \u2194 dict<\/td>\n set_max_intset_entries<\/td>\n setTypeConvert<\/td>\n t_set.c<\/td>\n<\/tr>\n \n hash<\/td>\n ziplist \u2194 dict<\/td>\n hash_max_ziplist_entries, hash_max_ziplist_value<\/td>\n hashTypeConvert<\/td>\n t_hash.c<\/td>\n<\/tr>\n \n list<\/td>\n quicklist（\u5185\u90e8 ziplist）<\/td>\n list-max-ziplist-size<\/td>\n \u5185\u90e8\u81ea\u52a8\u7ba1\u7406<\/td>\n quicklist.c, t_list.c<\/td>\n<\/tr>\n \n string<\/td>\n int \u2194 embstr \u2194 raw<\/td>\n OBJ_ENCODING_EMBSTR_SIZE_LIMIT (44)<\/td>\n tryObjectEncoding<\/td>\n object.c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u56db\u3001io \u591a\u8fdb\u7a0b\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101807-6a65dedf3fde9.png\")
<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"\u6ce8：\u8be5\u6587\u7528\u4e8e\u4e2a\u4eba\u5b66\u4e60\u8bb0\u5f55\u548c\u77e5\u8bc6\u4ea4\u6d41，\u5982\u6709\u4e0d\u8db3，\u6b22\u8fce\u6307\u70b9\u3002\u4e00\u3001\u7ebf\u7a0b\u6570\u76ee\u64cd\u4f5c\u6570\u636e\u7ed3\u6784\u7684\u8bed\u53e5（\u5373\u6267\u884c\u6307\u4ee4）\u662f\u4e3b\u7ebf\u7a0b（\u5355\u7ebf\u7a0b，\u5929\u7136\u5177\u5907\u9694\u79bb\u6027\u3001\u4e0d\u9700\u8981\u52a0\u9501）\u522b\u7684\u7ebf\u7a0b\u4e3b\u8981\u7528\u4e8e\u4f18\u5316：\u907f\u514dIO\u5bc6\u96c6\u578b\u548cCPU\u5bc6\u96c6\u578b\u8fc7\u591a\u5360\u7528\u4e3b\u7ebf\u7a0b\u4e8c\u3001IO\u5bc6\u96c6\u578b\u5c42\u9762\u7684\u4f18\u53161. \u78c1\u76d8IOrdb：\u901a\u8fc7fork\u5b50\u8fdb\u7a0b\u6765\u6301\u4e45\u5316aof：\u6709\u5f02\u6b65\u5237\u76d8\u673a\u5236（\u53ef\u9009&<\/p>\n","protected":false},"author":2,"featured_media":84807,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[105,371,100],"topic":[],"class_list":["post-84815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-redis","tag-371","tag-100"],"yoast_head":"\n
Linux C\/C++ \u5b66\u4e60\u65e5\u8bb0\uff0865\uff09\uff1aRedis\uff08\u516d\uff09\uff1a\u8bba\u201d\u5355\u7ebf\u7a0b\u201c\u670d\u52a1\u5668\u662f\u5982\u4f55\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684\uff0c\u542b\u90e8\u5206\u6e90\u7801\u5256\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/84815.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux C\/C++ \u5b66\u4e60\u65e5\u8bb0\uff0865\uff09\uff1aRedis\uff08\u516d\uff09\uff1a\u8bba\u201d\u5355\u7ebf\u7a0b\u201c\u670d\u52a1\u5668\u662f\u5982\u4f55\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684\uff0c\u542b\u90e8\u5206\u6e90\u7801\u5256\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6ce8：\u8be5\u6587\u7528\u4e8e\u4e2a\u4eba\u5b66\u4e60\u8bb0\u5f55\u548c\u77e5\u8bc6\u4ea4\u6d41，\u5982\u6709\u4e0d\u8db3，\u6b22\u8fce\u6307\u70b9\u3002\u4e00\u3001\u7ebf\u7a0b\u6570\u76ee\u64cd\u4f5c\u6570\u636e\u7ed3\u6784\u7684\u8bed\u53e5（\u5373\u6267\u884c\u6307\u4ee4）\u662f\u4e3b\u7ebf\u7a0b（\u5355\u7ebf\u7a0b，\u5929\u7136\u5177\u5907\u9694\u79bb\u6027\u3001\u4e0d\u9700\u8981\u52a0\u9501）\u522b\u7684\u7ebf\u7a0b\u4e3b\u8981\u7528\u4e8e\u4f18\u5316：\u907f\u514dIO\u5bc6\u96c6\u578b\u548cCPU\u5bc6\u96c6\u578b\u8fc7\u591a\u5360\u7528\u4e3b\u7ebf\u7a0b\u4e8c\u3001IO\u5bc6\u96c6\u578b\u5c42\u9762\u7684\u4f18\u53161. \u78c1\u76d8IOrdb：\u901a\u8fc7fork\u5b50\u8fdb\u7a0b\u6765\u6301\u4e45\u5316aof：\u6709\u5f02\u6b65\u5237\u76d8\u673a\u5236（\u53ef\u9009&\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/84815.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-26T10:18:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260726101806-6a65dede5b436.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/84815.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/84815.html\",\"name\":\"Linux C\/C++ \u5b66\u4e60\u65e5\u8bb0\uff0865\uff09\uff1aRedis\uff08\u516d\uff09\uff1a\u8bba\u201d\u5355\u7ebf\u7a0b\u201c\u670d\u52a1\u5668\u662f\u5982\u4f55\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684\uff0c\u542b\u90e8\u5206\u6e90\u7801\u5256\u6790 - 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