Hi,
for the NetApp part, here is copy-paste from the netapp kb:
Answer
The volume "Over Provisioned Space" value provided in OnCommand System
Manager (OCSM) is the "Over Provisioned Size" field provided by the
|volume ||show|
<
https://docs.netapp.com/ontap-9/topic/com.netapp.doc.dot-cm-cmpr-930/volu...
at the cluster shell.
This value is determined by the following formula:
(volume size) - (volume used) - (volume space available) - (snapshot used space) ==
storage that can't be provided by the aggregate if written to the volume
for the ovirt part:
Ovirt will see the volume size available within thin-volume without any
knowledge of the aggregate space (available/or not) in behind.
Recommendation:
on netapp side do volume auto-grow and you are safe as long as you have
free space inside aggregate.
HTH
On 05.11.19 14:54, Vrgotic, Marko wrote:
Second attempt 😊
*From: *"Vrgotic, Marko" <M.Vrgotic(a)activevideo.com>
*Date: *Monday, 4 November 2019 at 14:01
*To: *"users(a)ovirt.org" <users(a)ovirt.org>
*Subject: *oVirt and Netapp question
Dear oVirt,
Few months ago our production environment oVirt with main Shared
storage via NFS Netapp is live.
We have been deploying VMs with thin provisioned HDD 40GB based
template, CentOS 7.
The Netapp NFS v4Â storage volume is 7TB in size, also Thin Provisioned.
First attached screenshot shows the space allocation of the production
volume from Netapp side.
Is there anyone in oVirt community who would be able to tell me the
meaning of the 5.31 TB Over Provisioned Space?
A screenshot of a cell phone Description automatically generated
Second attached is the info  of the production volume from oVirt side:
A screenshot of a social media post Description automatically generated
What I want to understand is the way how is oVirt reading the volume
usage and Netapp and where is the difference.
Is the Over Allocated Space something that is just logically
used/reserved and will be intelligently re-allocated/re-used as the
actual Data Space Used grows or am I looking at oVIrt actually hitting
Critical Space Action Blocker and will have to resize the volume?
If there is anyone from Netapp or with good Netapp experience that is
able to help understanding the data above better, thank you in advance?
Kindly awaiting your reply.
-----
kind regards/met vrindelijke groet
Marko Vrgotic
ActiveVideo
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