RE: Number of files copied by second to low
- From: Markus Waldmann <MarkusWaldmann@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 22 Jun 2005 05:23:15 -0700
Hi. Yes, FC too. But the problem allready starts if we copy the files locally
from one to another volume on the SAN. With 10 files of 2 GB we achieve a
throughput of over 60 MB/s, so the SAN is not the limiting factor.
Markus
"Will" schrieb:
> How the server backup is connected to the robot? FC too?
>
> "Markus Waldmann" wrote:
>
> > Hi
> > $In our environement we have a file cluster (Win2003, no SP1 yet, MSCS) with
> > an IBM FastT SAN attached over fibre channel. The Server is dual proc with
> > 2GHz and 2GB RAM.
> > We have to backup the whole 700GB volume every night. We have had a problem
> > with the amount of time it took. The backup job ran for over 30 hours. After
> > changing the backup server to new hardware, it runs much better, but we are
> > not satisfied. We have a lot of files and did e few tests to search for the
> > bottle neck.
> > A few numbers:
> > Copying of files locally from disk to disk (or backin up with ntbackup to
> > disk):
> > 1 dir, 1 file, 280 MB, 6 seconds: 46MB/s
> > 337 dir, 2600 files, 26 MB, 45 s: 0.6 MB/s
> > 133000 dir, 1.3M files, 540 GB, 122 ks, 4.5 MB/s
> > It seems very strange, that the amount of files extremely reduces throughput
> > of data. 45 MB/s will not fill up our path to the backup roboter. Are there
> > other users with similar problems and throuput rates or is there a way to
> > speed up the server?
> > I have read the "Performance tunig guidelines" from MS, ut couldn't figure
> > out how to achieve an increase of factor 10 to 40, so that the SAN and backup
> > will be used optimally.
> > Thanks for every advice or hint, even the confirmation of the problem will
> > help.
> > --
> > Markus Waldmann
> > Sen. Systems Engineer
> >
.
- References:
- Number of files copied by second to low
- From: Markus Waldmann
- RE: Number of files copied by second to low
- From: Will
- Number of files copied by second to low
- Prev by Date: RE: 2000 Server with XP Client Synchronisation Problem
- Next by Date: Server Shutdown gets "It is now safe to shut down server"
- Previous by thread: RE: Number of files copied by second to low
- Next by thread: Windows 2003 print spooler question with TCP/IP Printer service
- Index(es):
Relevant Pages
|
