CODEWITHSUNDEEP
redisredis-cluster
RRM
RRM

Reputation: 2670

Redis clear understanding of the master + replica + sentinel and a standard cluster

I came across multiple things:

  1. Redis cluster with multiple master and their corresponding replica(s).
  2. Redis master + replicas with sentinels.

As per https://redis.io/topics/cluster-tutorial a replica could be promoted to be the next master in case the original master fails. If this is so, why is the Sentinel process needed?

I need clarification on the cluster, cluster with Sentinel.

Are replicas and slaves absolutely the same in the context of Redis?

Upvotes: 0

Views: 914

Answers (1)

for_stack
for_stack

Reputation: 22906

Redis Sentinel is used for standalone deployed Redis instances.

Redis Cluster does failover by nodes in the cluster. It does not need the help of Redis Sentinel.

In a word, you don't need Redis Sentinel when deploying Redis Cluster.

Upvotes: 2

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