Question (Quoted): 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?

Answer: The server is configurable to run a maximum number of concurrent backups. Each client can have a different Blackout Schedule (jobs won't run on the host during the specified timeframe) to ensure certain hosts are only backed up at specific times. If backing up *nix machines via rsync one can 'nice' the backup process so that it only runs while the machine has available cycles. Using 'nice' is so effective my company can backup web servers during the day without any noticeable performance degradation. To nice a backup job use this for RsyncClientCmd:

$sshPath -q -x -l backuppc $host nice -n 10 /usr/bin/sudo $rsyncPath $argList+

Ryan Manikowski

System Administrator
2ergo Americas Inc.
 
:703.677.8499:
www.2ergo.com
Arlington, VA

 
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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 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…)

- TvEw

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