Redis Master-slave replication

Master-slave replication

Redis Master-slave replication is very simple to configure and use, with master-slave replication allowing multiple slave servers (from the server) and master server (master server) to have the same database copy.

Features of Redis master-slave replication

1.Master can have multiple slave

2. Multiple slave can connect to the same master, and can also connect to other slave (when Master goes down, one of the master can immediately become host master)

3. Master-slave replication does not block master, while primary can continue to process client requests. (Does not affect client continuing to write data to master)

4. Improve the scalability of the system.

Redis master-slave replication process

1.slave Connect with master, send sync (sync command)

2.master initiates a background process, saves the database snapshot to a file, and the master master process starts collecting new write commands and caches.

3. After the background is finished saving, send this file to slave

4.slave Save this file to your hard disk.

Redis Master-slave replication