table of Contents
Mixed redis4.0 persistence mechanism
rdb persistent file name: dump.rdb. Redis.conf specified in the configuration file stored path dir
RDB
principle
Trigger When
Specify the location of persistent files redis.conf configuration file, the data will be restored accordingly at the start redis:
AOF
principle
Redis operating principle is to log additional way to write files, read operations are not recorded.
Save command is redis
Use in the file "/" to search the contents of the file:
Open AOF
Start and log redis:
aof log file name:
aof log file description
Trigger When
① lost data comparison:
rdb and aof data will be lost, but some more serious rdb lost data. aof will not lose more than two seconds of data.
② log file size comparison:
aof> rdb rdb log file is stored in binary format, aof is stored in string format.
aof rewriting mechanism
auto-aof-rewrite-percentage 100
It represents a ratio of the size of the trigger, 64M after being rewritten only 30M, then triggered rewritten reaches 60M, if 80 is set, then triggered when rewriting 30M + 30 * 0.8 = 54M.
Mixed redis4.0 persistence mechanism
to sum up
