[rdiff-backup-users] Re: Ways to speed rdiff-backup a bit

[Chris G]

On Fri, Jan 15, 2010 at 05:27:59PM +1000, Gavin wrote:
> Chris G wrote:
> > I'm running rdiff-backup on a Western Digital My Book World Edition
> > II, it's a little NAS server that runs linux and has ssh login
> > available. 
> >
> > The rdiff-backup is running from one of the NAS server's drives to the
> > other drive, i.e. it's not being run from another system to (or from)
> > the NAS and thus is not limited by network bandwidth.
> >
> > I'm backing up two large[ish] directories, one is around 164Gb, the
> > other is about 35Gb.
> >
> > The 35Gb one takes about 7 minutes to run, which is fine, but the
> > 165Gb one takes 4 hours and 5 minutes.  Presumably there's some sort
> > of resource limitation which the bigger backup is hitting and hence
> > running slower.
> >
> > Is there anything I can do to improve performance?  My first guess
> > would be that rdiff-backup is running out of 'real' memory and
> > swapping which is slowing things.
> >
> > It has 126828 kB of memory, more than I thought, that's 128Mb.
> >
> > The processor is an ARM926EJ-S, 183 BogoMIPS.
> >
> How about splitting the larger backup into 3 or 4 parts?
> 
> 
Yes, that's a possibility, though it is rather one large bit and
several small bits.  However it might be that decreasing the size by a
fairly small amount would help so it's worth trying.  Thanks.

-- 
Chris Green