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From Yang <teddyyyy...@gmail.com>
Subject Re: incremental backup and Priam?
Date Tue, 14 Aug 2012 21:11:36 GMT
ah... my bad, thanks for the explanation!

On Tue, Aug 14, 2012 at 1:57 PM, aaron morton <aaron@thelastpickle.com>wrote:

> The Priam code is looking for the <keyspace>/<columnfamily>/backups
> directory created by cassandra during incremental backups. If it finds it
> the files are uploaded to S3.
>
> It's taking the built in incremental backups off node. (AFAIK)
>
> Cheers
>
>   -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 15/08/2012, at 8:16 AM, Yang <teddyyyy123@gmail.com> wrote:
>
> in the initial incremental backup implementation,
> the hardlinking to the backup dir was in the CFS.addSSTable()  code, so
> it's part of the Cassandra code.
>
> I looked at Priam,
> https://github.com/Netflix/Priam/blob/master/priam/src/main/java/com/netflix/priam/backup/IncrementalBackup.java
>
> this code pretty much does the same thing as the original addSSTable()
> incremental backup .
> so the Priam backup code operates outside of Cassandra write path?
> any insight into why this approach was chosen instead of using the
> incremental backup provided by Cassandra?
>
> thanks
> Yang
>
>
>

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