Mark D. Foster wrote: > > Paul Heinlein wrote: > > On Tue, 18 Sep 2007, Flaherty, Patrick wrote: > > > >> If I had the time, I'd like to try using Xen with an > OpenSolaris ZFS > >> iSCSI target as shared storage, but alas I do not have that time. > > > > FWIW, I've had good luck compiling and running the iSCSI target from > > http://iscsitarget.sourceforge.net/ on CentOS 5. There > aren't all the > > bells and whistles of ZFS, I suppose, but it's pretty simple to set > > up. Also, given gigabit ethernet and a decent switch, its bonnie++ > > numbers aren't bad at all. > > > Apples and oranges, though. iSCSI is networked block storage. It does > not case what filesystem you lay on it. As someone who > learned this the > hard way, it is not enough to have iSCSI to support live vm migration. > If you are look to setup 2+ xen hosts and live migrate amongst them > (known as vmotion in vmware-land) you need _shared_ storage > filesystem, > and ext3 is not that nor is zfs. See > http://en.wikipedia.org/wiki/List_of_file_systems#Shared_disk_ > file_systems > for a list of FS that would suitable to lay on iSCSI for this purpose. There is a configuration though that doesn't need a cluster file system to perform live migrations and that is where the Xen VMs write directly to a block device which is an iSCSI target. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.