Redis sentinel vs clustering

Question

I understand redis sentinel is a way of configuring HA (high availability) among multiple redis instances. As I see, there is one redis instance actively serving the client requ

Answer 1

This is not direct answer to your question, but think, it's helpful information for Redis newbies, like me. Also this question appears as the first link in google when searching the "Redis cluster vs sentinel".

Redis Sentinel is the name of the Redis high availability solution... It has nothing to do with Redis Cluster and is intended to be used by people that don't need Redis Cluster, but simply a way to perform automatic fail over when a master instance is not functioning correctly.

Taken from the Redis Sentinel design draft 1.3

It's not obviuos when you are new to Redis and implementing failover solution. Official documentations about sentinel and clustering doens't compare to each other, so it's hard to choose the right way without reading tons of documentations.