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Re: [BackupPC-users] Poor BackupPC Performance
2011-07-26 17:24:15
"C. Ronoz" <chronoz AT eproxy DOT nl> wrote
on 07/26/2011 04:13:28 PM:
> I would love to use BackupPC and if I can get it to speeds of 4 or
5
> MB per second I would be thrilled. I just benchmarked both a
> BackupPC and Bacula back-up (not simultanously) and BackupPC ran 3
> hours, 10 minutes for 15GB, while Bacula did it in 17 minutes.
OK. 15,000MB in 17 minutes = 140Mb/s. That's
reasonably sporty for a backup but perfectly doable. 3 hours is more
like 13Mb/s. That is way too slow. So why is yours running
so slow?
What is the CPU utilization during the BackupPC backup?
What is the network utilization? What is the disk utilization?
Is the machine swapping? Is it doing something else?
Start with "vmstat 1" on the BackupPC box
and watch it. See what the usage pattern looks like. Try to
find out what is limiting your performance.
We've been trying to tell you that you're seeing abnormal
performance. I get much better performance with a single 1.5GHz VIA
processor, 512MB RAM and a single SATA spindle. Something is wrong
here. We are not going to be able to tell you what: you will
have to dig a little deeper and see what your machine is doing during a
backup.
Timothy J. Massey
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