Hey Tom. I don't know that there's a "max" for the drive compression algorithm; it's a function of the data.
I routinely see 2.1-2.2:1 on basic mixtures of fileservers, print servers, winders stuff. Oracle is almost always higher, I expect 3-3.5:1. I've seen DB2 compress at 6:1. On Thu, Feb 26, 2009 at 12:07 PM, Kauffman, Tom <kauffm...@nibco.com> wrote: > I'll admit to not having a good grasp of the PCI-E architecture, but I'll > stand by my statement that you'll need PCI-E to get maximal performance out > of LTO-4. I'm fairly certain you'll need to go LAN-free to hit the maximum > as well - I know that's my current bottleneck. As a side note - does anyone > know what the maximum drive data compression is on LTO-4? I'm getting about > 4.1 to 1 on SAP/R3-Oracle, with some tapes hitting 3.5 to 3.7 TB before > becoming full. > > I am glad to hear the X86 architecture scales this well - thanks, Kelly. > > Tom Kauffman > NIBCO, Inc > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of > Kelly Lipp > Sent: Thursday, February 26, 2009 11:12 AM > To: ADSM-L@VM.MARIST.EDU > Subject: Re: Preferred TSM Platform > > I have to disagree with that. We routinely run multiple (up to six, and > the only reason it's only six is we don't have any more to test so perhaps > more will run) LTO4 drives as fast as they want to run using and IBM x3850 > processor. We run four at a time using an x3650. The buses are PCI-E, > drives are either SAS or FC. Would that box run six or eight of the IBM > fancy pants drives? I don't know, haven't ever seen it tried. > > For most sites, Windows and the crummy little hardware it runs on will be > just fine. For you big fellas, not so much. If you are in the "gotta push > 3-6TB/day" Windows will work. For you 10TB/day folks, maybe not. > > Kelly Lipp > CTO > STORServer, Inc. > 485-B Elkton Drive > Colorado Springs, CO 80907 > 719-266-8777 x7105 > www.storserver.com > > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of > Kauffman, Tom > Sent: Thursday, February 26, 2009 7:39 AM > To: ADSM-L@VM.MARIST.EDU > Subject: Re: [ADSM-L] Preferred TSM Platform > > Yup. > > It boils down to Wanda's statement: "I/O, I/O, it's all about I/O" --- > Wanda Prather > > If you can do the work with LTO-1 or -2 drives, or DLT-7000, or similar > speed/capacity, then Windows will work. When you get into > high-speed/high-capacity drives the Intel/AMD architecture comes unglued. A > single LTO-4 drive will use ALL the I/O bandwith of a PCI or PCI-x bus, and > a significant chunk of a PCIe(1) bus. The challenge becomes one of finding a > suitable X86 server with multiple PCIe busses in the design. > > IBM has the GX series I/O modules with two PCIe busses each for the P6 > architecture that allows for significant I/O bandwith expansion -- for a > cost, of course. > > Tom Kauffman > NIBCO, Inc > > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of > Kelly Lipp > Sent: Wednesday, February 25, 2009 4:14 PM > To: ADSM-L@VM.MARIST.EDU > Subject: Re: Preferred TSM Platform > > I love it when somebody quotes me! Somebody is listening. > > I had this discussion with one of our customers yesterday. It really > does/should boil down to the OS experience you have on hand. Does the AIX > platform have more capacity/performance than the best Windows platform? I'm > guessing it probably does. But at what cost? And then more importantly: do > either of the platforms have enough for you? If both do, then pick the one > that makes more sense based on your OS experience. And remember: one can > always divide and conquer. > > Kelly Lipp > CTO > STORServer, Inc. > 485-B Elkton Drive > Colorado Springs, CO 80907 > 719-266-8777 x7105 > www.storserver.com > > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of > Allen S. Rout > Sent: Wednesday, February 25, 2009 1:52 PM > To: ADSM-L@VM.MARIST.EDU > Subject: Re: [ADSM-L] Preferred TSM Platform > > >> On Wed, 25 Feb 2009 15:57:37 +0100, Henrik Vahlstedt < > s...@statoilhydro.com> said: > > > Time to quote Kelly... > > > "So to me it's either AIX or Windows (yes, you can do a lot of TSM > > on Windows once you get past the bigotry!). Choose whichever one > > you have the most experience with." > > <gollum> Achhhh! It BURNS usss, nassssty windowsss.... </gollum> > > > - Allen S. Rout > - Prefers AIX for this. *koff* :) > > > CONFIDENTIALITY NOTICE: This email and any attachments are for the > exclusive and confidential use of the intended recipient. If you are not > the intended recipient, please do not read, distribute or take action in > reliance upon this message. If you have received this in error, please > notify us immediately by return email and promptly delete this message > and its attachments from your computer system. We do not waive > attorney-client or work product privilege by the transmission of this > message. > > > CONFIDENTIALITY NOTICE: This email and any attachments are for the > exclusive and confidential use of the intended recipient. If you are not > the intended recipient, please do not read, distribute or take action in > reliance upon this message. If you have received this in error, please > notify us immediately by return email and promptly delete this message > and its attachments from your computer system. 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