Do you have to run nodetool repair on every node?

Do you have to run nodetool repair on every node in a cluster, or do you only need to run it on one node, and from there Cassandra will take care of the rest?

In looking through the documentation, I am having a hard time finding a reference for this, but the short answer is "yes" you need to run nodetool repair on each node in your cluster. The closest I can find is the documentation on repairing nodes which suggests that you should not run repair on more than one node in your cluster at a time.

You can also run repair with the -pr flag, which limits the repair operation to the first token range that current node is responsible for. This cuts down on the duplication of work when run on the remaining nodes.

StackExchange Database Administrators Q#82414, answer score: 12