| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
Re: [Xen-users] Clustering
On 06/04/2011 16:44, Eduardo Bragatto wrote:
On Apr 6, 2011, at 12:34 PM, Jonathan Tripathy wrote:
I'm still in deep thought about distributing raw CPU power across
multiple machines for Xen DomUs. Does Amazon really only run their
DomUs on single boxes? So their marketing that says "Elastic
Computing" is just a simple stop DomU, change config file, resize lvm
volume and restart DomU?
You don't really have to stop DomU to change all parameters -- a LVM
resize would require it though.
Anyway, EC2 does not even have persistent storage, so there's no LVM
there -- it's all about the CPU and RAM. And increasing CPU and RAM
does not require the DomU to be restarted (see "xm mem-set" and "xm
vcpu-set").
The term "elastic" comes from the idea that you can virtually increase
/ decrease CPU and RAM according to your needs. It does not mean you
can "stretch" a VM to a size larger than a single physical server and
span it across multiple boxes.
Well, it's good to know that they aren't doing any "magic" then :) (I'm
guessing their persistent storage is the S3 side of things)
BTW, they are offering you a VM with 64 cores:
http://aws.amazon.com/hpc-applications/
Look on the left in the box that says "HPC Trial". Is this just a
physical machines with lots of real CPUs?
Thanks
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home