Hello Vin,
our tsm-server is just on gigabit and some of the clients are also
there. My guess is that your restore - performance is just
showing what your drive can read ( maybe magstar - drives ? ).
I just assume that you are restorung from tape ... because i got nearly
exact the same throughput when using 1 tape for restore over gigabit.
I also have slower backups, but thats because of a maybe-not-optimal-tuned
disk-pool ( ssa-mirrored) whre our backups are running to.
You just may try backing up direct to tape and see a difference ?

Greetings
Rainer


Steve Schaub wrote:
>
> Paul (or anyone who knows),
> If Vin has the logging mode set to rollforward, does that impact
> performance?  I only suggest this because I have had a nagging slowdown
> in some operations and the only change I can really identify is that we
> switched from normal to rollforward logging.  Just a wild guess.
>
> -----Original Message-----
> From: seay_pd AT NAPTHEON DOT COM
> Sent: Wednesday, October 30, 2002 10:36 PM
> To: NAPTHEON.COM.seay_pd; VM.MARIST.EDU;.ADSM-L
> Subject: Re: HELP! Faster Restore than Backups over Gigabit?
>
>
> You have lots of RAM, but what is your bufferpool size.  For this size
> of machine memory, I would use at least 256MB for the bufferpool size.
> Also beef up the logpool size as well.  Your TSM DB and log are very
> small.  Do a Q DB F=D command and see what your database hit percentage
> is.  If it is less than 98 percent you need to increase the bufferpool.
>
> Did you TSM mirror the Database and Log?  If so, it is probably useless
> because you are already running protected disk.  Remember, on RAID 1 you
> still have to write all data twice and on read back both drives can be
> used as a source if the RAID card is smart enough to do that.
>
> I am betting that you are overrunning the RAID card during the backup.
> Are the RAID 1 mirror volumes on the same physical SCSI bus as the
> primaries? That could be the issue as well.
>
> Hope this helps.
>
> Paul D. Seay, Jr.
> Technical Specialist
> Naptheon Inc.
> 757-688-8180
>
>
> -----Original Message-----
> From: Vin Yam [mailto:vyam AT QBCT DOT COM]
> Sent: Wednesday, October 30, 2002 11:14 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: HELP! Faster Restore than Backups over Gigabit?
>
>
> Hi,
>
> Our backups are set for an absolute serialization.  We backup and
> restore the same number of files and the same amount of data 42 GB.  The
> TSM server is configured in a RAID 1E0 with a ServeRAID 4Mx adapter.
> The client is using a RAID 1.  We are going straight to disk since our
> diskpool is 150 GB. We've tried formatting the partition that the
> diskpool is on in 64k blocks, but it hasn't proved much help.
>
> Is there a case where the TSM DB can be TOO large?  Our TSM DB volume is
> 1 GB in size and our recovery log is 250 MB in size.  We have 4 GB of
> RAM on the TSM server, so we didn't consider this to be a problem.
> Thanks for any help.  Please email me if you need more information.
>
> -Vin
> vyam AT qbct DOT com
>
>
> -----Original Message-----
> Forum:   ADSM.ORG - ADSM / TSM Mailing List Archive
> Date:      Oct 30, 00:08
> From:      Seay, Paul <seay_pd AT NAPTHEON DOT COM>
>
> Actually, the 2048 TCPWINDOWSIZE is not supported in NT to my knowledge.
> It is supported in W2K at SP1 or 2, cannot remember, with a registry
> hack. Someone else will have to give the particulars on that.
>
> Be careful comparing restores to backups.  Depending on what numbers you
> are using, you may get the wrong conclusions.  Make sure it is the same
> files backed up that were restored.  Also, look at where your backup is
> going to on your server.  If it is going to RAID-5 storage pools, that
> is it.  The write penalty on the RAID-5 Array is the cause of the backup
> delay.  If you are going directly to tape, I do not know what the issue
> is without a lot more information.
>
> Paul D. Seay, Jr.
> Technical Specialist
> Naptheon Inc.
> 757-688-8180
>
>
> -----Original Message-----
> From: Vin Yam [mailto:vyam AT QBCT DOT COM]
> Sent: Tuesday, October 29, 2002 7:16 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: HELP! Faster Restore than Backups over Gigabit?
>
>
> Hi,
>
> We just installed Gigabit fiber NICs and an isolated gigabit fiber
> switch. Our restores have increased dramatically from 31.81 GB/hr (8.84
> MB/s) to 56 GB/hr (15.6 MB/s).  The backups are still around 35.5 GB/hr
> (9.8 MB/s).  The TSM server is very powerful (NT 4.0 SP6a Dual 1.8 Ghz
> P4 w/ 4GB RAM, 150 GB RAID array) and the clients are (Netware 4.2 Quad
> XEON P3 w/ 4 GB RAM). (We've tried changing the TCPWindow Size in our
> dsmserv.opt from 63 to 2048 with no effect) We're running TSM 5.1.1.4
> server and TSM 4.2.3 netware
> client.   Any
> ideas?  Please email me direct if you have any suggestions or need more
> information.  Thanks.
>
> DSM.OPT settings
>
> ** TSM TWEAKS **
> COMPRESSION NO
> LARGECOMMBUFFERS YES
> MEMORYEFFICIENTBACKUP NO
> PROCESSOR 20
> RESOURCEUTILIZATION 10
>
> TXNB 2097152
>
> TCPB 32
> TCPNodelay YES
> TCPWindowsize 64
> ** TSM TWEAKS **
>
> managedservices schedule webclient
> schedmode prompted
>
> -Vin
> vyam AT qbct DOT com

--
-------------------------------------------------------------------------------
Rainer Wolf                                     mail: rainer.wolf AT rz.uni-ulm 
DOT de
tel: ++49 731 50-22482                          fax:  ++49 731 50-22471
Computing Center, University of Ulm, Germany    web: http://www.uni-ulm.de/urz