Igor,
Thanks for the link. It's a good idea and should certainly reduce the
client impact. On the client side in V4 it should provide the same
benefits. I'll look at whether I can include this on the server side (but
probably not for 4.0.0).
Craig
On Sat, Jul 6, 2013 at 4:13 PM, Igor Sverkos <[email protected]>wrote:
> Hi,
>
> Craig Barratt wrote:
> > - rsync-bpc-3.0.9.1.tar.gz: a modified rsync that
> > runs on the server that has a shim layer that
> > interfaces directly to the BackupPC file system.
>
> Not sure where this modified rsync version will be used, but do you know
> rsync's fadvise patch?
> We are currently testing the patched rsync version with BPC and the
> results are very good. Without the patch, backing up a server every night
> will cause some performance penalty to the backed up server, because rsync
> will fill up the server's page cache with the backed up data, but this will
> blow out the application's data.
>
> With the patch, we don't notice the backup job on most servers, because
> the application data is all in memory and I/O is free for rsync.
>
> For details: http://insights.oetiker.ch/linux/fadvise/
>
> Latest patch (from January 2013):
> http://tobi.oetiker.ch/patches/rsync-3.0.9-3-fadvise.patch
>
> Not sure of this is a client thing or if this can be helpful in the
> upcoming BPC 4 version...
>
>
> --
> Regards,
> Igor
>
>
>
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