[ovirt-users] Storage over allocation ratio value larger than 125% will pause vms

Yaniv Dary ydary at redhat.com
Mon Dec 7 06:53:26 EST 2015


Yaniv Dary
Technical Product Manager
Red Hat Israel Ltd.
34 Jerusalem Road
Building A, 4th floor
Ra'anana, Israel 4350109

Tel : +972 (9) 7692306
        8272306
Email: ydary at redhat.com
IRC : ydary


On Mon, Dec 7, 2015 at 12:38 AM, Jan Bernard Wevers <
jan.bernard.wevers at group2000.com> wrote:

> I’m using ovirt 3.6 and an iscsi storage domain. Almost all vms are using
> thin provisioning with a virtual size of 40GB and a typical physical size
> of
> 8 GB.
> Now I’m facing the fact that ovirt is pausing my vms due to the following
> event message:
> (Example):  “VM vm_01_16_centos6 has been paused due to no Storage space
> error.”
>
> When I look at the iscsi storage domain the over allocation ratio value is
> about 127%, but of the 2799GB there is still more than 1500GB available.
> My questions:
> - Why ovirt is pausing the vms?
>

We have a minimal amount of 1G needed to do storage related actions.


> - Can I enlarge the over allocation ratio before ovirt is complaining about
> storage space?
>

In 3.6 you can change this threshold pre storage, but I would recommend
against this.


>
>
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