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From Robert Coli <rc...@eventbrite.com>
Subject Re: Question about incremental backup
Date Sat, 23 Aug 2014 18:30:12 GMT
On Sat, Aug 23, 2014 at 8:06 AM, Jens Rantil <jens.rantil@tink.se> wrote:

>  I am setting backup and restoration tooling for a Cassandra cluster and
> have a specific question regarding incremental backup.
>
> Let’s say I’m running incremental backups and take a snapshot. At the
> exact(ish) same time as my snapshot it taken another incremental *.db file
> is hard linked into the backups directory. My question is, how do I know
> which snapshot my incremental file belongs to?
>

Tablesnap avoids this race by snapshotting files directly from the data
directory, and backing it up with a meta-information file that contains a
list of all SSTables in the data directory at the time it notices a new
one. You can probably do something similar with the incremental snapshot
system, but you might want to consider if you need to. :D

https://github.com/JeremyGrosser/tablesnap

=Rob

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