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: [EMAIL PROTECTED] > 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@;QBCT.COM] > Sent: Wednesday, October 30, 2002 11:14 AM > To: [EMAIL PROTECTED] > 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 > [EMAIL PROTECTED] > > > -----Original Message----- > Forum: ADSM.ORG - ADSM / TSM Mailing List Archive > Date: Oct 30, 00:08 > From: Seay, Paul <[EMAIL PROTECTED]> > > 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@;QBCT.COM] > Sent: Tuesday, October 29, 2002 7:16 PM > To: [EMAIL PROTECTED] > 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 > [EMAIL PROTECTED] -- ------------------------------------------------------------------------------- Rainer Wolf mail: [EMAIL PROTECTED] tel: ++49 731 50-22482 fax: ++49 731 50-22471 Computing Center, University of Ulm, Germany web: http://www.uni-ulm.de/urz
