Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms
Hi, I have the same problem with thin provisioned VMs (or VMs with snapshot) It got a lot better (but not fixed) using this guide https://access.redhat.com/solutions/130843 to adjust the tunables Maybe it helps Christian Von: users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] Im Auftrag von Yaniv Kaul Gesendet: Montag, 07. Dezember 2015 15:49 An: Jan Bernard Wevers Cc: users@ovirt.org Betreff: Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms On Mon, Dec 7, 2015 at 12:38 AM, Jan Bernard Wevers mailto:jan.bernard.wev...@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.” oVirt is not pausing VMs. QEMU/KVM does, when it gets a storage error (in order to prevent possible corruption). Can you please attach VDSM logs from the relevant host where this is happening? TIA, Y. 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? - Can I enlarge the over allocation ratio before ovirt is complaining about storage space? ___ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms
On Mon, Dec 7, 2015 at 12:38 AM, Jan Bernard Wevers < jan.bernard.wev...@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.” > oVirt is not pausing VMs. QEMU/KVM does, when it gets a storage error (in order to prevent possible corruption). Can you please attach VDSM logs from the relevant host where this is happening? TIA, Y. > > 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? > - Can I enlarge the over allocation ratio before ovirt is complaining about > storage space? > > > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms
Yaniv, Thanks for your answers. Really appreciate this. As most of the vm’s (70 vm’s of a total of 80) are not running, the risk of getting out of physical disk space is low. The vm’s are pre-installed from a template, installed with application software and will only be powered on when needed. So most of the vm’s actually allocate no more than 5 GB of physical space (of a virtual size of 35GB). The actual used disk size of all vm’s is about 900GB, leaving 1900GB of free space of a total of 2800GB. The allocated disk space is around 3300GB, making an over allocation ratio of 125%. So in this special case ovirt will pause my vm’s if the ratio will exceed 125%, while still having plenty of physical disk space. You mentioned that it is possible to change the value to a larger value, but I could not find how to do this? Thanks, Jan Bernard From: Yaniv Dary [mailto:yd...@redhat.com] Sent: maandag 7 december 2015 12:53 To: Jan Bernard Wevers Cc: users@ovirt.org Subject: Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms 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: yd...@redhat.com IRC : ydary On Mon, Dec 7, 2015 at 12:38 AM, Jan Bernard Wevers 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. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users smime.p7s Description: S/MIME cryptographic signature ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Storage over allocation ratio value larger than 125% will pause vms
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: yd...@redhat.com IRC : ydary On Mon, Dec 7, 2015 at 12:38 AM, Jan Bernard Wevers < jan.bernard.wev...@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. > > > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[ovirt-users] Storage over allocation ratio value larger than 125% will pause vms
Im 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 Im 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? - Can I enlarge the over allocation ratio before ovirt is complaining about storage space? smime.p7s Description: S/MIME cryptographic signature ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
