Tracy R Reed wrote:
> Ok, so over the course of the last few days I think I have got just
> about everything figured out. I have a full backup of all three of my
> systems safely on DVD, I can restore, it does incrementals automatically
> every night, I am happy.
>
> Except for one thing: The backups are VERY slow. Even the host local to
> the DVD burner is very slow so it cannot be the network even though I
> have tested that and it is very fast. It seems to run somewhere between
> 100k/s and 1M/s. I do not know why it varies. It seems like perhaps it
> gets faster as the backup progresses, I'm not sure. At first I thought
> maybe I was somehow running out of disk bandwidth or causing disk
> contention since I am backing up from and spooling DVD images to the
> same spindle. But I ran some disk benchmarks and watched iostat and
> while the backup is running I can get 50MB/s disk throughput. Plus it's
> slow when streaming from other hosts and spooling locally. Also, the cpu
> time is 95% idle during the backup so it isn't cpu contention. So it
> would seem that the delay must be coming from somewhere within bacula
> itself. A full backup of my system should take just a couple of hours,
> not 12!
>
> I am running bacula from CVS as of three or four days ago on an AMD64
> running FC4.
>
> Any ideas? Thanks!
Have you investigated a database bottleneck? What SQL backend are you
using? What's system CPU load during backup?
--
Phil Stracchino [EMAIL PROTECTED]
Renaissance Man, Unix generalist, Perl hacker
Mobile: 603-216-7037 Landline: 603-886-3518
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