Persistency?

[sanarena]

Hi
Do you have plan to add persistency data to your implementation? (or already implemented?)
If I turn off all nodes and run them again, will there be a redis data loss?

[doyoubi]

Undermoon itself does not control the persistency. Redis persistence is only configured in your Redis instances. See redis docs.

And our k8s operator also does not specify this config. It depends on the Redis image, which is enabled by default. You can check this by sending CONFIG GET save to redis.

[doyoubi]

Also, Undermoon supports one replica for each master, so even if the persistence is disabled, in most cases, we shouldn't lose all the data.

But from a system design perspective, I think we should only use Redis to store the data that can be recovered from other data source.