Re: [BackupPC-users] hardware and configuration recommendations for speed?
2010-05-26 00:25:41
Frank J. Gómez wrote at about 15:20:12 -0400 on Tuesday, May 25, 2010:
> Thanks for your response, Jeffrey.
>
>
> > I wonder whether there is something wrong with your setup,
> > particularly on the Windows machine.
> >
>
> I'm open to that possibility, though I'm not sure where to begin
> troubleshooting.
>
>
> > Yet, incremental backups take about 15-20 min and fulls take about 70
> > minutes. So unless you are changing a large fraction of the files and
> > disc space between fulls, I would suggest that there is a problem with
> > your setup.
> >
>
> I took a look at some of the machines that are *not* experiencing problems
> and found that they are not transferring particularly quickly either. I
> have two machines which storing about 10,500 files each, totaling between
> 2.5 and 4 GB, and they are taking between 1 and 2.5 hours for fulls and
> anywhere between 4 and 90 minutes for incrementals. (I think the variance
> there is due mostly to whether or not BackupPC is trying to backup RED5 at
> the same time. RED5 backups very significantly impact the performance of
> the other backups.) But I think this shows that something about my system
> as a whole (whether it's my config or a bottleneck at the USB) is slow --
> not just that particular client. Do you agree?
There is nothing intrinsic about Windows XP Home, cygwin/rsyncd
(especially with cygwin 1.7), and BackupPC that should be causing your
backups to be significantly worse than backing up a Linux system.
Are those other machines also Windows XP Home or are they linux?
USB drives are slow and the problem may be exacerbated if the pool is
on a USB drive and you are not doing checksum caching.
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