incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Watanabe Maki <watanabe.m...@gmail.com>
Subject Re: Snapshotting to a different volume?
Date Thu, 19 May 2011 00:44:02 GMT
SSTables are immutable. Those won't changed once written to disk.

From iPhone


On 2011/05/19, at 9:37, Sameer Farooqui <cassandralabs@gmail.com> wrote:

> As of 0.8.0, is it possible to take a Cassandra snapshot to a different volume (like
a EBS volume dedicated for backups)?
> 
> About a year ago, Jonathan Ellis said that this won't be implemented b/c snapshots are
basically hard links:
> http://mail-archives.apache.org/mod_mbox/cassandra-commits/201002.mbox/%3C821546961.221891265939548009.JavaMail.jira@brutus.apache.org%3E
> 
> But I don't fully understand that. If a snapshot is just a hardlink, won't the snapshot
also change as new data is written to the SSTables?
> 
> - Sameer

Mime
View raw message