"Kevin M. Myer" wrote:
>
> Hello,
>
> Awhile back, I had posted about problems I was having with using AMANDA
> with Mac OS X Server. The problems I was seeing related to extremely long
> backup times, in excess of 8 hours to backup only 400MB of
> data. Apple has disabled ktrace debugging of the kernel so there wasn't
> much I could do to figure out where the problem is. However, recently, I
> decided to do a set of dumps with compression turned off. It turns out,
> thats where the slowdown is occuring. For some reason, the compression
> pipe from gzip to tar is extremely slow under Mac OS X Server.
When I first used AMANDA, I used it without compression. Then I upgraded
the tape drivers (which used an inherend "block" compression,
transparent to the user), the new ones did not support any inherent
compression, so I had to use the usual "client" compression. I was
amazed to see how much longer it took. Where AMANDA used to take 2-3
hours to finish, now it took 6-8!
I checked it and it is normal. "gzip -v9" (or whatever "best"
compression means) just takes that long, even on other occasions, not
just AMANDA backups. I would suspect that the time for a CPU upgrade has
arrived (at least on this 486DX-133 I still use here ;-)).
--
Regards
Chris Karakas
Don´t waste your cpu time - crack rc5: http://www.distributed.net
