Redis source code parsing (5): redis persistence, redis source code parsing

Redis source code parsing (5): redis persistence, redis source code parsing

Redis is often called a memory database because it stores all data in the memory. To enable the data to continue to be used after the server restarts, Redis provides two persistence modes: RDB and AOF.

When Redis is running, the RDB program saves the database snapshots in the current memory to the disk file. When Redis is restarted, the RDB program can restore the database status by loading the RDB file.

The core functions of RDB are rdbSave and rdbLoad. The former is used to generate the RDB file to the disk, and the latter is used to reload the data in the RDB file into the memory:

AOF records all commands (and their parameters) written to the database in the form of protocol text to the AOF file, so as to record the database status.

Zookeeper