There were set of maintenance windows and each server needs to be assigned a window for patch and reboot. We have Cassandra clusters with nodes up to 30+. though we have chosen maintenance windows based on Racks and DC we still had to patch and restart multiple nodes at the same time. Does Cassandra support this kind of patching and reboot? . What is the impact on rebooting a live cluster like this. ?
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Erick Ramirez for the following reason: The question is answered, right answer was accepted
If your question is around rolling restarts then it depends on how your application is configured and you are better off discussing it with your app support and development teams.
If your application uses local quorum for reads and writes then it shouldn't be an issue taking down a whole DC. If your application uses a lot of lightweight transactions then you need to make sure that a global quorum of replicas are available. This depends heavily on the replication settings of the application keyspaces. Cheers!
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