David Rees wrote:
On 9/19/07, Tony Nelson <[EMAIL PROTECTED]> wrote:
Attached are the files you requested. The BackupPC server was running 2
long running backups when I took these. In addition to the screenshots
you requested, I added a screenshot from the web console of BackupPC.
From your screenshots, the web server CPU/disk utilization is not an
issue, vmstat is showing it to be near idle.
Your backup server is showing about 22% waiting on disk IO, how many
processors and what type of disk/filesystem is your backuppc data
partition on?
The system has 2 dual core Xeon processors.
CPU0: Intel(R) Xeon(TM) CPU 2.66GHz stepping 09
(repeated of course for CPU[1..3])
The filesystem is a 1.5TB Hardware controlled RAID Array made up of
250GB IDE (not SATA) drives, in a Penguin Computing Relion 430 server.
If your backuppc data partition isn't mounted with noatime, that's one
of the first things I'd do (but isn't likely to make a huge
difference). It also appears that you aren't using the checksum-seed
rsync option, you should enable that as well.
The filesystem is a ReiserFS (M5 hash if memory serves) filesystem,
mounted as:
/dev/sda1 /var/lib/backuppc reiserfs noatime 1 2
I'm not aware of the checksum-seed option to rsync, but I'll look it up
and add it tonight, and see how the backup goes.
I attempted counting the number of files being backed up by selecting
data from a SQL server that contains information about most of the
files. The most reasonable ballpark I can give you is between 275k and
300k files. If a it's better, I'll run a 'find /ha -type f | wc -l'
during the off hours tonight, unless you can suggest a better command.
Not too many files. How much new data is being backed up each day? You
can get file counts and sizes of full/incr backups by looking at the
hosts's summary page under "File Size/Count Reuse Summary"
It turns out my guess was way wrong.
Totals
842487 Files
24267.8MB Data
0.52MB/s Transfer
Existing
841356 Files
22695.2MB Data
New
3086 Files
1572.8MB Data
I also see looking at that page, I haven't had a good full backup in
quite some time. I manually schedule this particular backup out of cron
to ensure that it starts at the same time every day and it looks like
the full from the past couple of weekends failed. I wonder if that is
affecting performance.
Thanks for your help
Tony
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fn:Tony Nelson
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email;internet:[EMAIL PROTECTED]
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