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Posted to user@cassandra.apache.org by Tamar Fraenkel <ta...@tok-media.com> on 2012/04/30 07:39:54 UTC
incremental_backups
Hi!
I wonder what are the advantages of doing incremental snapshot over non
incremental?
Are the snapshots smaller is size? Are there any other implications?
Thanks,
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
tamar@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
Re: incremental_backups
Posted by Ben Coverston <be...@datastax.com>.
The documentation in the cassandra.yaml file covers this pretty well.
In summary, a snapshot will create a hard link for each file in the data
directory (if JNA is installed and on the classpath).
Turning on incremental backup will create a hard link to every new SSTable
that is flushed out to disk. Together a snapshot and a set
of incrementals can allow you to recover to a specific point in time.
On Sun, Apr 29, 2012 at 11:39 PM, Tamar Fraenkel <ta...@tok-media.com>wrote:
> Hi!
> I wonder what are the advantages of doing incremental snapshot over non
> incremental?
> Are the snapshots smaller is size? Are there any other implications?
> Thanks,
>
> *Tamar Fraenkel *
> Senior Software Engineer, TOK Media
>
> [image: Inline image 1]
>
> tamar@tok-media.com
> Tel: +972 2 6409736
> Mob: +972 54 8356490
> Fax: +972 2 5612956
>
>
>
>
--
Ben Coverston
DataStax -- The Apache Cassandra Company
Re: incremental_backups
Posted by Jonathan Ellis <jb...@gmail.com>.
Incremental snapshots contain only new data, so they are *much* smaller.
On Mon, Apr 30, 2012 at 12:39 AM, Tamar Fraenkel <ta...@tok-media.com>wrote:
> Hi!
> I wonder what are the advantages of doing incremental snapshot over non
> incremental?
> Are the snapshots smaller is size? Are there any other implications?
> Thanks,
>
> *Tamar Fraenkel *
> Senior Software Engineer, TOK Media
>
> [image: Inline image 1]
>
> tamar@tok-media.com
> Tel: +972 2 6409736
> Mob: +972 54 8356490
> Fax: +972 2 5612956
>
>
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com