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google-cloud-platformgoogle-cloud-memorystore

Does GCP MemoryStore support strong consistency?

I'm accessing MemoryStore from java/kubernetes using the 'lettuce' client. Can I expect a 'get' to be strongly consistent with GCP MemoryStore?

Solution

  • Memorystore for Redis isn't a distributed data store so you always query one single instance. There's no consistency issue in play.

    For completeness, Memorystore for Redis offers 2 service tiers:

    • Basic tier: provides a standalone Redis instance.
    • Standard tier: Provides a highly available Redis instance that includes automatically enabled cross-zone replication and automatic failover. This means it provisions 2 instances, but the second one is just a replica of the first one for failover in case the master has an issue. However, you still only query on the master instance.