[mceachen]

You're exactly right -- if all your EBS volumes are served out of the same SAN hardware, or worse, served from the same physical spindle in the SAN, you're still toast.

When I was testing with bonnie++ though, I saw 2x better I/O numbers with raid5 or raid6 with these volumes, which I would not expect to see if they were served out of the same spindle.

If only AWS supported SSD-backed EBS volumes, eh?

[PStamatiou]

SSD stuff is on the horizon. Their site is not very descriptive but SolidFire is doing some impressive stuff: http://www.solidfire.com/ - from the founder of JungleDisk