Redis HA setup: AOF issue with replicas

Question

I tested Redis standalone server with AOF persistence for every write operation, as I cannot afford to lose even one updated value from distributed clients.

1. In the Redis HA setup, does it make sense to use AOF along with Redis replication?
2. Is it possible to use Redis server replicas with synchronous replication?

In my env, the write throughput is not really high, i.e. I'm OK with a write request latency of even ~50-80 milliseconds.

Answer 1

In the Redis HA setup, does it make sense to use AOF along with Redis replication?

Yes, you can use AOF along with Redis replication.

Is it possible to use Redis server replicas with synchronous replication?

No. The replication is asynchronous. However, you can try WAIT command to mitigate the problem.

NOTE: Flushing write to disk for every write operation might have a big performance problem. You'd better do benchmark before apply it to production.