My comment concerned the VM portion of the question, not the iSCSI portion. I concur with Gary on that.
Kelly Lipp Chief Technology Officer www.storserver.com 719-266-8777 x7105 STORServer solves your data backup challenges. Once and for all. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Gary Bowers Sent: Thursday, March 11, 2010 12:37 PM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Virtual TSM server - using disk only My experience with direct connected iSCSI storage on a TSM server is that it gets abysmal performance unless you turn off Direct IO in TSM. See other posts for that. It is technically possible, but with the iSCSI limitation you might not want to use RMD "Raw Device Mapping" in VMware. I am not sure on this, but it makes sense given what I have seen and read about here. By the way, NFS and CIFS were equally bad performers for disk pools with DirectIO turned on. They seem to really need the filesystem caching. I'm "guessing" that putting the disks in a VMFS would help buffer the writes, and give you decent performance. It is something that would need to be tested first. I'm confident that it would be much faster than WAN connection back to the States. Yuck. Good luck, Gary Bowers Itrus Technologies On Mar 11, 2010, at 1:18 PM, Ochs, Duane wrote: > Good day everyone, > Has anyone explored using TSM server (windows) on a VM using Iscsi > storage ? No library requirement at this time. > I have multiple European sites within close proximity of each other > and they have outgrown the WAN coming back to the states. > Only storage available there is Iscsi and they have a substantial > VMware implementation which would allow us to ride on a VM if > feasible/functional. > > Thoughts ? > > Thanks, > Duane
