Re:When EC2 Hardware Changes Underneath You
by xyzzy123 on Wednesday January 09, 2013 @09:31AM
(#5031630)
Well yeah. Except you can't ask for a given type of hardware, you can only ask for a certain instance type, right?
Basically the picloud model is you do a "cloud" call, and that runs on some instance (usually shared, picture a single instance doing some number of picloud calls in parallel) at some point in the future.
The sticking point for them was that the same instance type was backed not only by different CPUs, but by some subset of instances whose CPU capability advertising was broken.
It does actually break "instance type equivalence" for people running real code. I think Amazon will fix it though.
Basically the picloud model is you do a "cloud" call, and that runs on some instance (usually shared, picture a single instance doing some number of picloud calls in parallel) at some point in the future.
The sticking point for them was that the same instance type was backed not only by different CPUs, but by some subset of instances whose CPU capability advertising was broken.
It does actually break "instance type equivalence" for people running real code. I think Amazon will fix it though.