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rohitasave avatar image
rohitasave asked Erick Ramirez answered

Is it mandatory to run a repair post-Cassandra upgrade?

Hello, I have a running Apache Cassandra 3.11.6 cluster of 7 nodes.

I had upgraded to 3.11.6 version from 2.1.9 version. After upgrading I ran `nodetool upgradesstables` on all nodes at once. And see that it got completed and data present in data directory has been converted to 3.11.6 format.

Now I am not sure whether I should run `nodetool repair -pr <keyspace>` on all the nodes, starting with rest of the nodes and coming to seed node at the end. Could anyone please guide me the best practices?

repair
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Erick Ramirez answered

No, running a repair isn't required as a result of upgrading a cluster. Just make sure you run repairs regularly (at least once a week) as part of your normal maintenance tasks.

However, we recommend that you run a repair on all nodes before upgrading nodes to make sure data is consistent. Cheers!

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