Is it safe to add a new node to a Cassandra cluster while a repair is running?

by Gene   Last Updated September 14, 2018 16:06 PM

I'm getting ready to expand an existing Cassandra cluster. I have repairs scheduled to run on a reoccurring basis. Do I need to disable repairs when adding a new node to a cluster, or can I bootstrap new nodes while repairs are running elsewhere in the cluster?



Answers 1


As per datastacks docs,

Warning: DataStax recommends stopping repair operations during topology changes; the Repair Service does this automatically. Repairs running during a topology change are likely to error when it involves moving ranges.

So, it is clear that topology changes (adding/removing nodes) are not recommended when there is a repair process alive in your cluster

Dinesh Kumar
Dinesh Kumar
September 14, 2018 15:42 PM

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