Re: [Openstack] Doubts about virtual CPUs and Swift storage capacity.

2012-02-13 Thread Caitlin Bestler
John Dickinson wrote: > Here's how to find the usable space for swift > marketing size of the drive (eg 2TB) * .92 (to account for formatted size * > .8 (for 80% fullness) / replicas > If you have 15 TB of formatted space with 3 replicas, that gives you 5TB of > usable space. If you have 15TB

Re: [Openstack] Doubts about virtual CPUs and Swift storage capacity.

2012-02-11 Thread John Dickinson
On Feb 11, 2012, at 7:29 AM, Jorge Luiz CorrĂȘa wrote: > > 2) About Swift, how do I determine the total usable storage capacity of the > system? For example: I have 3 nodes with 5 HDs of 1 TB each one. Straightly I > have 15 TB of space. If I use raid 1 I can say that I'm going to have 7,5 TB >

[Openstack] Doubts about virtual CPUs and Swift storage capacity.

2012-02-11 Thread Jorge Luiz CorrĂȘa
Hi, I would like to understand two things important here in this moment. 1) What really means a virtual CPU? How does Openstack/KVM deal with CPU allocation from host to instances? For example: I have a compute node, with 2 six cores Xeon, totalizing 24 threads. If I instantiate 24 instances, i