Thanks for the replies, Kenneth and Les. Kenneth, do you find that SMB is
faster than rsync for backing up Windows boxes?
Les, that' not good news if 2-3 hour incremental backups and 7 hour full
backups are par for the course. Is the slowdown due to the network-transfer
time, or is some kind of checksum being run on every single one of the 21,000+
files, even during an incremental backup? If so, why isn't the
"--checksum-seed=32761" option making any difference?
Thanks. It'd be nice if I could setup some blackout times for this Windows PC,
but unfortunately it gets turned on in the morning, used sporadically (but
consistently) during the day, then turned off at night.
> Date: Mon, 13 Sep 2010 23:38:49 -0500
> From: lesmikesell AT gmail DOT com
> To: backuppc-users AT lists.sourceforge DOT net
> Subject: Re: [BackupPC-users] Why does my rsync backup takes 7 hours?
>
> That seems slow, but not completely out of line. If the machines are on all
> the
> time you would normally want a blackout period set for the times you are
> likely
> to be working. A couple of things to check: the server needs to hold the
> entire directory listing in RAM, so be sure it has enough to avoid swapping.
> Also, on the windows side you might have an on-access virus scanner slowing
> you
> down.
>
> --
> Les Mikesell
> lesmikesell AT gmail DOT com
> On 9/13/10 10:26 PM, George Adams wrote:
> >
> > Hi, all. I'm running BackupPC 3.1.0 on a Linux server (in my home), using
> > it to backup my WinXP box (on the same network) via rsync (which is run as
> > a service under WinXP via Cygwin).
> >
> > The process seems to work, but it's really, really slow. Here's what I
> > mean:
> >
> > Backup# Type Filled Level Start Date Duration/mins Age/days Server Backup
> > Path
> > 568 incr no 1 8/25 08:00 428.5 19.6
> > /backup/Photos/568
> > 569 incr no 1 9/11 09:00 171.4 2.6
> > /backup/Photos/569
> > 570 incr no 1 9/12 21:00 156.8 1.1
> > /backup/Photos/570
> >
> > As you can see, the last couple of incremental backups of the photos
> > directories on my XP box have taken between 2-3 hours, and the full backup
> > takes a whopping 7 hours.
> >
> > TOTAL TOTAL TOTAL EXIST EXIST NEW NEW
> > Backup# Type #Files Size/MB MB/sec #Files Size/MB #Files Size/MB
> > 568 full 21665 132328.3 5.15 21665 132328.3 1 0.0
> > 569 incr 21702 132850.0 12.92 21673 132848.9 29 1.1
> > 570 incr 21719 132850.4 14.12 21694 132849.8 80 0.6
> >
> > Now granted, this is a lot of files - 21,000+ files, 132GB. But even given
> > that, are these incredibly long backup durations REALLY to be expected?
> > Even worse, the WinXP computer really is almost unusable while this is
> > going on. The hard drive is so busy (and rsync so resource-intensive) that
> > other applications take forever to launch, run, etc. What I had hoped
> > would be a quiet, unobtrusive way to backup the PC during the day actually
> > makes it fairly unusable for several hours.
>
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