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From aaron morton <>
Subject Re: Cassandra backup queston regarding commitlogs
Date Wed, 02 May 2012 01:56:51 GMT
If you delete the commit logs you are rolling back to exactly what was in the snapshot. When
you take a snapshot it flushes the memtables first, so there is nothing in the commit log
that is not in the snapshot. Rolling back to a snapshot is rollback to that point in time.

If you want to restore to any point in time you need snapshots + incremental snapshot + commit
log (for things that have not made it to sstables). Otherwise there is a potential loss of
data that has not been flushed to disk. This is different to what the DS docs are talking
about. I'm not sure why they are saying delete the commit log, try asking on their forum


Aaron Morton
Freelance Developer

On 2/05/2012, at 12:02 PM, Roshan wrote:

> Any help regarding this is appreciated.
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