[jira] [Created] (CASSANDRA-10898) Migrate Compaction Strategy Node by Node

["Andrew From (JIRA)" <ji...@apache.org>]

Andrew From created CASSANDRA-10898:
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             Summary: Migrate Compaction Strategy Node by Node
                 Key: CASSANDRA-10898
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10898
             Project: Cassandra
          Issue Type: Wish
          Components: Compaction, Tools
            Reporter: Andrew From


It would be a great feature to be able to slowly change the compaction strategy of a ColumnFamily node-by-node instead of cluster wide. Currently if you change it cluster wide there's no good way to predict how long it will take. Thus the process could run for days while you still need the live data, but the cluster responds much more slowly due to the compaction strategy migration.

I stumbled across http://blog.alteroot.org/articles/2015-04-20/change-cassandra-compaction-strategy-on-production-cluster.html which gave me the idea. I was thinking this would be a nice feature to add to NodeTool, provided that the strategy in the blog is sound I wouldn't mind going ahead with the dev work to automate it. If not I would love to hear other ideas on how to best make this happen.



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