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cassandracqlcql3cqlshcassandra-2.1
Vinod Jayachandran
Vinod Jayachandran

Reputation: 3898

How to do full replication of data to new cassandra clustered node?

I have 2 node Cassandra cluster. I wish to replicate the complete data into a 3rd node so that the 3rd node will have complete data (for some special needs). All the 3 nodes will have Cassandra version 2.1.8.

With replication factor 3, I plan to follow as per doc in Adding nodes to an existing cluster

Question:

  1. Is it correct approach ? If so, when can I confidently say data replication is complete (assuming I restrict inflow of data)

  2. Can I replicate only a subset of tables from a cassandra keyspace ?

Upvotes: 3

Views: 908

Answers (1)

Aaron
Aaron

Reputation: 57748

  1. Yes, that is the correct approach. Although, I don't see a step to adjust the replication factor on your keyspace for your datacenter. Make sure you do that just before adding your new node. Also, as your RF = number of nodes, you won't need to run nodetool cleanup on the existing nodes.

  2. No, you cannot. You can replicate only a subset of keyspaces differently, but not actual tables themselves. If you have tables that need to be replicated differently, you should put them in their own keyspaces.

Upvotes: 3

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