Yep.  BackupPC distributes the load automatically.  I limit the backups
to 4 at a time and I setup a blackout window from 7am to 4pm.  What this
means is that machines that are on all the time are *not* backed up
during the day between 7am and 4pm.  The machines that are not on all
the time (e.g. laptops) are then backed up during the day.  What I found
was that within 3 - 4 days the 250 machines had spread themselves out
over the 24 hour period.

cheers,

ski

On Fri, 2008-11-28 at 15:06 -0500, Jeffrey J. Kosowsky wrote:
> Thomas von Eyben wrote at about 20:44:05 +0100 on Friday, November 28, 2008:
>  > On Thu, Nov 27, 2008 at 8:22 PM, Ski Kacoroski <kacoroski AT gmail DOT 
> com> wrote:
>  > > As far as I am concerned, BackupPC scales very well.  I run 200 - 250
>  > > clients onto 3 year old single proc, 1GB ram, and (4) 250GB sata disks
>  > > in a raid 5.  The limiting factor is the I/O throughput.
>  > 
>  > How do you configure your clients to make sure that not all 250
>  > clients are being backed up at the same time, IE how are you
>  > distributing the load?
> 
> I assume he uses a (possibly adjusted) version of the default
> configuration parameters:
> $Conf{MaxBackups} = 4; 
> Plus some of the related parameters (as needed)
> $Conf{MaxUserBackups} = 4;
> $Conf{MaxPendingCmds} = 10;
> 
>  > 
>  > I am currently planning to evaluete backuppc to back up about the same
>  > amount of clients and I  am a little "nervous" of the peak load if I
>  > am not capable of distributing the load over the full working day
>  > (clients are mainly labtops$,1s&)
>  > 
>  > - TvEw
>  > 
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-- 
"When we try to pick out anything by itself, we find it
 connected to the entire universe"            John Muir

Chris "Ski" Kacoroski, kacoroski AT gmail DOT com, 206-501-9803
or ski98033 on most IM services



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