Mirko
Ok, well maybe we can compare things here, because I have been using DSU's
to an HP EVA over fiber, and to be truthful, the throughput is pants !!! In
fact, writing to LTO3 is BETTER than disk.
I do think that writing to disks has been a poor experience for me, and its
something I may not return to, because I cannot see where I am going wrong!!
Things to look at on the client:
1) If AV is running, turn it off
2) If any Disk defrag / maintenance is taking place on the Server (Disk
tune-ups, I/O other than backups), turn off
3) If Tracker.exe is running on the client, turn it off.
4) verify that the correct STU is being used for tape backups
5) What type of files are being backed up? Small files are still no good
(even on fiber its poor).
Over fiber for a server will SMALL files, a 60GB partition can take around
1:30 - 2 hours over LAN Network direct to fiber attached LTO3 Drives.
2TB of Data on a SAN Media Server takes between 4 - 10 hours (sometimes the
last stream can take 10 hours, again its mainly a lot of small files on
here).
HTH - gives some ideas and suggestions. I do NOT use 6.0 as it's a little
buggy (Talk to Ed, he can go into details on this!).
Regards
Simon Weaver
3rd Line Technical Support
Windows Domain Administrator
EADS Astrium Limited, B23AA IM (DCS)
Anchorage Road, Portsmouth, PO3 5PU
Email: Simon.Weaver at Astrium-eads.net
-----Original Message-----
From: mirko_nbu at mac.com [mailto:mirko_nbu at mac.com]
Sent: 15 September 2006 08:55
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] (no subject)
Hi experts,
a customer of mine is unsing NetBackup 6.0 on a Windows 2003 platform as
it's central backup/recovery infrastructure. A FC attached library
with 3x LTO3 drives is used for storing the data. For better backup/restore
performance, a disk staging area is used!
Unfortunately, the customer only gets about 20Mb/s performance when storing
it's staging area to tape. As far as I know, a LTO3 can deliver round about
60-70Mb/s
and starts streaming at about 30-35Mb/s... anyone with the same setup can
give
some suggestions?
Buffer sizes are already properly configured...
Thanks a lot!
Cheers,
Mirko
_______________________________________________
Veritas-bu maillist - Veritas-bu at mailman.eng.auburn.edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
This email is for the intended addressee only.
If you have received it in error then you must not use, retain, disseminate or
otherwise deal with it.
Please notify the sender by return email.
The views of the author may not necessarily constitute the views of Astrium
Limited.
Nothing in this email shall bind Astrium Limited in any contract or obligation.
Astrium Limited, Registered in England and Wales No. 2449259
Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England
|
