G.
Things I would look for.

Dont use 127.0.0.1/localhost for TCPserveraddress.  This I have found to be
slower for TSM backup/restore on some OS's as it is just a test interface.
Make sure active virus scanning is turned off.
Software based raid will slow things down too.

You indicated that single file restorations are fast, so those things above
could affect them as well.
But if your single files were small the writing of them  could be simply
cached.
When restoring a huge backupset it will quickly fill up hardware/software
write caching and will reveal the true speed of your disk drives.

I hope this helps.




                      Giedrius Jankauskas
                      <Giedrius.Jankauskas@MI         To:      ADSM-L AT 
VM.MARIST DOT EDU
                      CROLINK.LT>                     cc:
                      Sent by: "ADSM: Dist            Subject: Slow backupset 
restore, a cry for help
                      Stor Manager"
                      <ADSM-L AT VM.MARIST DOT EDU>


                      08/17/2004 06:27 AM
                      Please respond to
                      "ADSM: Dist Stor
                      Manager"






Hello Gentelmen,

I have browsed through forums and newsgroups but failed to find an
answer. I have read that backupset generation can be a slow process,
however, I am experiencing a slow restore from backupset. The backupset
generation takes aproximately 8  (3 lto tapes) hours, however, now I see
that the dsmsvc.exe I/O read bytes rate is only 1.5MB/sec . This is
unbelievebly slow and I cannot find the reason for this. I have read
that the previous versions of TSM client (4.*) had problems with
backupset performance, but not the 5.1.* release. What can influence the
restore performance so drastically ? Why is reading backupset so much
slower than generating one ? Regular file restore/backup to tape
functions properly and reaches 15MB/s. I do not expect that with the
backupset as there is some information processing going on, but no
1.5MB/s while the cpu is almost idle.

Environment :
IBM LTO3600 single drive
Windows 2003 server
TSM Version 5, Release 1, Level 5.0
Both the client and server is located on the same machine and has the
library connected via scsi.

Please help !!!
Desperate.