CODEWITHSUNDEEP
cassandra
Dennis
Dennis

Reputation: 43

custom data replication in cassandra?

I'm wondering how I can go about implementing a custom data replication strategy where I would have complete control over how each record gets replicated (can it be done by overriding the Partitioner and/or ReplicatePlacementStrategy?).

I want to be able to replicate only a select few records while leaving the rest alone. So, basically I want to say: "Replicate this record through ALL nodes" or "Replicate that record through only two nodes" or "Don't replicate the records at all!"

If such a thing is not possible, is the easiest thing then simply using the ONE/ALL/QUORUM/etc consistency levels when calling writes in-code?

Obviously, I'm new to Cassandra and haven't fully wrapped my head around it. Any clarification would be great!

Upvotes: 4

Views: 692

Answers (1)

jbellis
jbellis

Reputation: 19377

NetworkTopologyStrategy lets you control this on a per-keyspace basis. If you really need it per-key, you'd need to override the calculateNaturalEndpoints method in a custom Strategy.

Upvotes: 3

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