Marcy, In the long run, I want to use the FCP capability that IBM just recently announced. That will let me access storage boxes natively, and not have to go through the blasted 3390 emulation nonsense. When I was at the VM/VSE Tech Conference in October, Neale Ferguson showed me a 200GB partition he had created on one of his Linux/390 systems using this technology. It was _not_ done by aggregating multiple 3390 volumes, it was just a single 200GB chunk carved out of a storage box. This does have a drawback, though (see below).
3390-9 and -27 are all of good use for Linux/390 on z/VM. Until z/VM gets PAV support, though, you are still going to want to try to spread things across multiple volumes to keep your I/O performance up. LVM is still going to be your friend in the medium term. Mark Post -----Original Message----- From: Marcy Cortes [mailto:[EMAIL PROTECTED] Sent: Thursday, April 03, 2003 4:24 PM To: [EMAIL PROTECTED] Subject: DASD technology for VM and Linux To: VM/ESA Mailing Lis <[EMAIL PROTECTED]> ** crossposted to VM-ESA and linux-390 ** I realize that this request is somewhat like asking you all what color looks best on me when you've never seen me in person.. but here goes anyway. My knowledge about DASD technology is pretty dated. We've usually just been given whatever os/390 is finished with, which, to be honest, has usually been adequate here for VM needs (although we do have an i/o bound FOCUS job that is having trouble meeting it's deadline that must be addressed too). Now we've been asked to put together a list of what Linux on VM might need in terms of DASD. Our situation so far has been build it and they will come. They are starting to come (we have 13 or so Linux guests now) but don't have a grand scheme of replacing the world (yet :). So far, we're mainly doing apache and another app which uses mysql. So what would you ask for if you didn't know what you needed and wanted to be prepared:) Our MVS environment has moved to all mod 9, mod 27, and FICON. Are these well suited to Linux? How about remote copy support (we do run our disaster recovery in house). Marcy Cortes Wells Fargo Services Co
