> > If all the 40 VMs start copying files at the same time that would mean
> > that the bandwidth share for each VM would be tiny.
>
> Would they? It's a possibility, and fun to think about, but what are the chances? You will usually run into this with backups, cron, and other scheduled [non-business load] tasks. These are far cheaper to fix with manually adjusting schedules than any other way, unless you are rolling in dough.
I have a classroom environment where every VM is always doing the same thing in step ie. formatting partitions, installing software etc.. We hit the disk like a bunch of crazy people. I'm replacing my setup with three Intel SSDs in a RAID0 with either iSCSI or ATAoE. The RAID0 will be synced to a disk based storage as backup. We'll see pretty soon how many concurrent disk based operations this setup can handle.
I'll be bonding 3 or 4 of the iSCSI box ethernet cards and then going from there to see what each of the servers in the cloud needs as far as their connection.
Grant McWilliams
Some people, when confronted with a problem, think "I know, I'll use Windows."
Now they have two problems.
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