[one-users] copy-on-write for better performance in OpenStack?

[Javier Fontan]

OpenNebula also supports qcow [1] but does not enforce you to use that
format. We prefer to have as default the features that are common to
the drivers that come packed with the distribution. It could happen
that a xen installation is not prepared for qcow and people trying the
software could get more problems than benefits.

There is a howto from C12G Labs that explains how to deal with qcow images. [2]

[1] http://opennebula.org/software:rnotes:rn-rel2.0.1
[2] https://support.opennebula.pro/entries/348847-using-qcow-images

On Fri, Mar 11, 2011 at 4:24 AM, xeoshow <xeoshow at gmail.com> wrote:
> Hello, dear all
>
> I found OpenNebula is really a  great product, but there is still just one
> feature not sure if already in OpenNebula.
>
> As in this link:
> http://www.openstack.org/projects/compute/
>
> Features of OpenStack Compute - Bexar Release
>
> ......
> Database versioning and migration support, for painless migration from one
> version to another.
> Instances now use copy-on-write by default for better performance.
> Support for availability zones, through the introduction of a new scheduler:
> ZoneScheduler.
>
> I think the COW can greatly enhance the instances provisioning performance,
> is it correct? Thanks a lot.
>
>
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> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>



-- 
Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
DSA Research Group: http://dsa-research.org
Globus GridWay Metascheduler: http://www.GridWay.org
OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org