Re: [rdiff-backup-users] Performance

[Jim C. Nasby]

On Sat, Feb 10, 2007 at 10:15:53PM -0700, Corey Puffalt wrote:
> Is anyone else having any performance issues with rdiff-backup?
 
I've run into numerous cases where rdiff-backup just doesn't perform
well, especially over a network. For example, doing a restore I'm doing
good to see 800kB/s (according to Activity Monitor in OS X), while an
scp of the same file will do 2+ MB/s.

Reverting a failed backup is also very slow. As is listing the size of
increments.

> # time rdiff-backup --check-destination-dir /mnt/backup/ibookbackups/
> 
> real    163m44.025s
> user    127m25.820s
> sys     18m1.866s
> 
> As you can see this took 2 hours and 40 minutes just to fix (?) the local
> backup directory.  Granted this machine is not a terribly fast machine (it
> has a Via C3 chip running at 1Ghz) but still, this seems rather excessive.
> The backup repository is about 58G in size.
> 
> Does anyone have any tips on how the performance can be improved?  Is this
> due to rdiff-backup being written in Python?
> 
> Backups, even when few files have changed also take a very long time (even
> longer than the time I show above) but I have yet to have a backup complete
> successfully recently (see my other post to the list from several days ago)
> so I don't have exact times.
> 
> Thanks,
> Corey

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-- 
Jim C. Nasby, Database Architect                address@hidden 
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