Redis replication order or priority ?

[Fabio Molinari]

In Redis configuration is possible to configure "slave-priority" to set priority for slaves promotion to master in case of failover by sentinel.

This priority is applied also when master replicate data to slaves after a write ?

For example, I've this schema:

  | MASTER | slave-priority = 10

  | SLAVE 1 |  slave-priority = 20

  | SLAVE 2 |  slave-priority = 30

  

Now MASTER receive a SET, the if OK start replication to SLAVE 1 and then to SLAVE 2 ?

Or the replication order is random ?

Thanks.

[The Real Bill]

Sentinel priority only has to do with selection of a promotable slave. Redis masters do not solicit information from a sentinel on replicatio. Replication is "managed" by each slave in a sense. Each slave connects and essentially subscribes to a stream of data modification commands. There is no explicit ordering because the master doesn't differentiate, it simply sends the data.