Open Stack

Hi Diego,

Thank you for the link.

Can you comment further on why you do not recommend overcommitting RAM?

By default, OpenStack overcommits RAM by a ratio of 1.5. Do you change this
setting to 1?

What kind of side effects have you seen from overcommitting?

Thanks,
Joe


On Mon, Sep 24, 2012 at 1:57 AM, Diego Parrilla Santamaría <
diego.parrilla.santamaria at gmail.com> wrote:

> Hi all,
>
> We wrote several months ago a quick overview about how to oversubscribe
> with StackOps Enterprise Edition. Surprisingly it was a presentation our
> customer they love :-o
>
> Here goes the presentation in slideshare:
>
> http://www.slideshare.net/stackops/stackops-openstack-nova-sizing-service-definition
>
> Cheers
> Diego
>  --
> Diego Parrilla
>  <http://www.stackops.com/>*CEO*
> *www.stackops.com | * diego.parrilla at stackops.com** | +34 649 94 43 29 |
> skype:diegoparrilla*
> * <http://www.stackops.com/>
> *
>
> *
>
>
>
>
> On Fri, Sep 21, 2012 at 4:39 PM, Samuel Winchenbach <swinchen at gmail.com>wrote:
>
>> Hi All,
>>
>> What are some "best practices" when it comes to overselling RAM in a
>> KVM based openstack setup?  For example:
>>
>> I have 4 nodes with 16 cores & 128 GB RAM each.  If on one of those
>> nodes I oversell ram 2:1 (256 GB RAM) and the VMs actually use that
>> much does it just start swapping out pages to disk?
>>
>> How do all of you handle overselling RAM?
>>
>> Thanks,
>> Sam
>>
>> _______________________________________________
>> OpenStack-operators mailing list
>> OpenStack-operators at lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>
>
>
> _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>


-- 
Joe Topjian
Systems Administrator
Cybera Inc.

www.cybera.ca

Big data is coming to Canada. Join the welcome wagon.
*Cyber Summit 2012*
October 1-3, Banff
www.cybera.ca/summit2012

Cybera is a not-for-profit organization that works to spur and support
innovation, for the economic benefit of Alberta, through the use
of cyberinfrastructure.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20120924/20dca4d6/attachment-0001.html>