- RDB方式: 数据持久化的过程中可能存在大量额外内存消耗。
- AOF方式: 通过aof文件恢复数据库的过程慢。
- 对于内存有限的服务，数据持久化不会带来额外的内存消耗。
- 相对AOF方式，数据库的恢复更快。
- 由于对redis写入操作需要同步到leveldb，导致性能损耗(读操作不受影响)。
redis-cli backup dir(备份文件目录)
- 当备份目录中包含BACKUP.log文件并且文件中有SUCCESS字段，表示备份成功
| Key | redis_in_ldb | redis_no_ldb |
|---|---|---|
| DEL | yes | yes |
| DUMP | yes | yes |
| EXISTS | yes | yes |
| EXPIRE | no | yes |
| EXPIREAT | no | yes |
| KEYS | yes | yes |
| MIGRATE | no | yes |
| MOVE | no | yes |
| OBJECT | yes | yes |
| PERSIST | no | yes |
| PEXPIRE | no | yes |
| PEXPIREAT | no | yes |
| PTTL | no | yes |
| RANDOMKEY | yes | yes |
| RENAME | no | yes |
| RENAMENX | no | yes |
| RESTORE | no | yes |
| SORT | yes(not store) | yes |
| TTL | no | yes |
| TYPE | yes | yes |
| SCAN | yes | yes |
| String | redis_in_ldb | redis_no_ldb |
|---|---|---|
| APPEND | yes | yes |
| BITCOUNT | yes | yes |
| BITOP | yes | yes |
| DECR | yes | yes |
| DECRBY | yes | yes |
| GET | yes | yes |
| GETBIT | yes | yes |
| GETRANGE | yes | yes |
| GETSET | yes | yes |
| INCR | yes | yes |
| INCRBY | yes | yes |
| INCRBYFLOAT | yes | yes |
| MGET | yes | yes |
| MSET | yes | yes |
| MSETNX | yes | yes |
| PSETEX | no | yes |
| SET | yes | yes |
| SETBIT | yes | yes |
| SETEX | no | yes |
| SETNX | yes | yes |
| SETRANGE | yes | yes |
| STRLEN | yes | yes |
| Hash | redis_in_ldb | redis_no_ldb |
|---|---|---|
| HDEL | yes | yes |
| HEXISTS | yes | yes |
| HGET | yes | yes |
| HGETALL | yes | yes |
| HINCRBY | yes | yes |
| HINCRBYFLOAT | yes | yes |
| HKEYS | yes | yes |
| HLEN | yes | yes |
| HMGET | yes | yes |
| HMSET | yes | yes |
| HSET | yes | yes |
| HSETNX | yes | yes |
| HVALS | yes | yes |
| HSCAN | yes | yes |
| Set | redis_in_ldb | redis_no_ldb |
|---|---|---|
| SADD | yes | yes |
| SCARD | yes | yes |
| SDIFF | yes | yes |
| SDIFFSTORE | no | yes |
| SINTER | yes | yes |
| SINTERSTORE | no | yes |
| SISMEMBERS | yes | yes |
| SMEMBERS | yes | yes |
| SMOVE | no | yes |
| SPOP | no | yes |
| SRANDMEMBER | yes | yes |
| SREM | yes | yes |
| SUNION | yes | yes |
| SUNIONSTORE | no | yes |
| SSCAN | yes | yes |
| SortedSet | redis_in_ldb | redis_no_ldb |
|---|---|---|
| ZADD | yes | yes |
| ZCARD | yes | yes |
| ZCOUNT | yes | yes |
| ZINCRBY | yes | yes |
| ZRANGE | yes | yes |
| ZRANGEBYSCORE | yes | yes |
| ZRANK | yes | yes |
| ZREM | yes | yes |
| ZREMRANGEBYRANK | yes | yes |
| ZREMRANGEBYSCORE | yes | yes |
| ZREVRANGE | yes | yes |
| ZREVRANKBYSCORE | yes | yes |
| ZREVRANK | yes | yes |
| ZSCORE | yes | yes |
| ZUNIONSTORE | no | yes |
| ZINTERSTORE | no | yes |
| ZSCAN | yes | yes |
| ZRANGEBYLEX | yes | yes |
| ZLEXCOUNT | yes | yes |
| ZREMRANGEBYLEX | yes | yes |