Thank you all. I have two more question.
1) Is there any implication in running nodetool repair immediately after bringing a new node up (before key migration process is completed) ? Will it cause some race conditions ? Or will it result in some part of the space never be reclaimed ? 2) How can I figure out the status of key migration in Cassandra? Thank you Emalayan ________________________________ From: Richard Low <rich...@wentnet.com> To: user@cassandra.apache.org; Emalayan Vairavanathan <svemala...@yahoo.com> Sent: Tuesday, 18 June 2013 12:11 AM Subject: Re: [Cassandra] Expanding a Cassandra cluster On 10 June 2013 22:00, Emalayan Vairavanathan <svemala...@yahoo.com> wrote: b) Will Cassandra automatically take care of removing obsolete keys in future ? In a future version Cassandra should automatically clean up for you: https://issues.apache.org/jira/browse/CASSANDRA-5051 Right now though you have to run cleanup eventually or the space will never be reclaimed. Richard.