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From Andrey Ilinykh <>
Subject Re: how to take consistant snapshot?
Date Fri, 07 Dec 2012 05:52:48 GMT
On Thu, Dec 6, 2012 at 7:34 PM, aaron morton <>wrote:

> For background
> If you it for a single node then yes there is a chance of inconsistency
> across CF's.
> If you have mulitple nodes the snashots you take on the later nodes will
> help. If you use CL QUOURM for reads you *may* be ok (cannot work it out
> quickly.). If you use CL ALL for reads you will be ok. Or you can use
> nodetool repair to ensure the data is consistent.
> I'm talking about restoring whole cluster, so all nodes are restored from
backup and all of them are inconsistent because they lost data  from commit
logs.  It doesn't matter what CL I use, some data may be lost.
Cassandra 1.1 supports commit log archiving
I think if I store both flushed sstables and commit logs it should solve my
problem. I'm wondering if someone has any experience with this feature?

Thank you,

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