True, assuming you have collocated your data by file space. If you haven't, (perhaps it is collocated by server, or not at all) it is possible to run into a situation where each instance of those DSM windows is attempting to access files which exist on the same tape.
I did this once, and found the same tape moving back and forth between two tape drives. I've since corrected my ways :) Wilson Northrup -----Original Message----- From: Prather, Wanda [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 02, 2003 8:58 AM To: [EMAIL PROTECTED] Subject: Re: NEED HELP - Restore performance Regardless of the client level, you can open as many dsm windows and start as many restores at once as you want. That's the best way to go if you have multiple filesystems to restore, up until you bottleneck your networks. -----Original Message----- From: Zoltan Forray/AC/VCU [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 01, 2003 10:10 PM To: [EMAIL PROTECTED] Subject: Re: NEED HELP - Restore performance FYI, FWIW, the option of multiple-restore streams was introduced with the 5.x client. While this machine is still using 4.2.3.0, we are going to investigate upgrading to 5.1.5.x Not sure why this client wasn't upgraded. Any specifics on how to do the "no query" restore ? We checked the book and from what it says, we are doing this (using wild-card/*, no -inact, etc). Are we missing something or is this one of those features that didn't really make it until the V5 client. Examples would be extremely helpful ! Lloyd Dieter <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> 04/01/2003 06:11 PM Please respond to "ADSM: Dist Stor Manager" To: [EMAIL PROTECTED] cc: Subject: Re: NEED HELP - Restore performance Zoltan, You've probably tried this already, but just in case...have you cranked up resourceutilization and maxnummp? Maybe no-query restores? Just a thought... -Lloyd On Tue, 1 Apr 2003 17:45:46 -0500 Zoltan Forray/AC/VCU <[EMAIL PROTECTED]> wrote: > This is a zOS TSM 4.2.3.2 server. The client server is AIX 4.3 with > TSM client 4.2.3.0 > > We had a recent hardware failure/disaster which resulted in a complete > wipe of 250GB+ of storage on an AIX 4.3 system. To complicate matters, > this is one of our email system, with 22-MILLION files comprising the > 250GB. > > So, we start the *BIG* restore. To put it quaintly, restore performance > sucks. We are averaging .5GB per hour. At this rate, it will take > 15-20 DAYS ! > > I have gone through the "TSM Performance Tuning" guide, to no avail. I > had pretty much done everything the book suggests, long ago, with the > exception of pagefixing storage for the VSAM/BSAM reads. > > Even checked its recommendations for the AIX system for things like > TCPIP settings, etc. > > The AIX system is hardly breathing hard, when it comes to CPU > utilization. > > What can I look at to do anything I can to speed things up ? > > Can I run multiple restores of different filesystems ? > -- ----------------------------------------------------------------- Lloyd Dieter - Senior Technology Consultant Registered Linux User 285528 Synergy, Inc. http://www.synergyinc.cc [EMAIL PROTECTED] Main:585-389-1260 fax:585-389-1267 ----------------------------------------------------------------- ------------------------------------------------------------------------------ Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (Whitehouse Station, New Jersey, USA) that may be confidential, proprietary copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please immediately return this by e-mail and then delete it. ==============================================================================
