<div dir="ltr"><span style="font-size:12.8000001907349px">Since thin provision in this case relates to sparse files you cannot</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">delete files in the VM and have the disk space reclaimed.</span><br style="font-size:12.8000001907349px"><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">But ovirt since v. 3.5 is using qemu-img to copy disk images. IRC this</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">process should very well result in a smaller image. So, just use disk</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">move and move the disk images to a new storage domain and it should do</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">the trick.</span><div><br></div><div>> Yes its working for linux VM only not windows vm .<br style="font-size:12.8000001907349px"><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">Another quite elegant way might be to use [fstrim]. But is is highly</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">depended of your VM config, storage domain, and needs virtio-scsi to my</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">knowlage.</span><br style="font-size:12.8000001907349px"><br><br>> Thanks for your information , will try this . </div><div><br><span style="font-size:12.8000001907349px">Another way to avoid this altogether is to to use a compressing file</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">system like ZFS for your storage domain.</span><br style="font-size:12.8000001907349px"></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">> nfs under ZFS files system formatted ? </span></div><div><span style="font-size:12.8000001907349px"><br></span></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 5, 2015 at 2:26 PM, Daniel Helgenberger <span dir="ltr"><<a href="mailto:daniel.helgenberger@m-box.de" target="_blank">daniel.helgenberger@m-box.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
<br>
On 05.06.2015 07:58, smiling dream wrote:<br>
> Thanks for you reply .<br>
> So if I understand you correctly you want to reduce the space a thin provision<br>
> disk takes up on the NFS share because you deleted files within the VM?<br>
> Yes<br>
><br>
> Is there any others way to reclaim disk space ,<br>
</span>Since thin provision in this case relates to sparse files you cannot<br>
delete files in the VM and have the disk space reclaimed.<br>
<br>
But ovirt since v. 3.5 is using qemu-img to copy disk images. IRC this<br>
process should very well result in a smaller image. So, just use disk<br>
move and move the disk images to a new storage domain and it should do<br>
the trick.<br>
<br>
Another quite elegant way might be to use [fstrim]. But is is highly<br>
depended of your VM config, storage domain, and needs virtio-scsi to my<br>
knowlage.<br>
<br>
Another way to avoid this altogether is to to use a compressing file<br>
system like ZFS for your storage domain.<br>
<br>
HTH<br>
<br>
[fstrim]<br>
<a href="http://dustymabe.com/2013/06/11/recover-space-from-vm-disk-images-by-using-discardfstrim/" target="_blank">http://dustymabe.com/2013/06/11/recover-space-from-vm-disk-images-by-using-discardfstrim/</a><br>
<span class=""><br>
coz i have bulks of vm under<br>
> thin provision manual process kind of impossible . As i know Vmware have this<br>
> kind of facility to reclaim from thin provision .<br>
><br>
> On Fri, Jun 5, 2015 at 11:48 AM, Alex McWhirter <<a href="mailto:alexmcwhirter@triadic.us">alexmcwhirter@triadic.us</a><br>
</span><span class="">> <mailto:<a href="mailto:alexmcwhirter@triadic.us">alexmcwhirter@triadic.us</a>>> wrote:<br>
><br>
> Sorry, I must have misunderstood.<br>
><br>
> So if I understand you correctly you want to reduce the space a thin<br>
> provision disk takes up on the NFS share because you deleted files within<br>
> the VM?<br>
><br>
> I'm pretty sure that thin provisioned disks can only grow. Once they have<br>
> been expanded there's no way to reclaim that space on the NFS share.<br>
><br>
> The only thing I think you can do is create a new thin provisioned disk and<br>
> copy the old data over at the file level, not the block level. Afterwards<br>
> you could delete the original disk.<br>
><br>
> Sent from my iPhone<br>
><br>
> On Jun 5, 2015, at 1:19 AM, smiling dream <<a href="mailto:smiling.dream@gmail.com">smiling.dream@gmail.com</a><br>
</span><span class="">> <mailto:<a href="mailto:smiling.dream@gmail.com">smiling.dream@gmail.com</a>>> wrote:<br>
><br>
>> I mean vm internal disk space .<br>
>> All of VM under thin provision . If i delete files and free space from VM<br>
>> still ovirt stroage showing vm disk space is used . How to reclaim disk<br>
>> space from guest VM .<br>
>><br>
>> On Fri, Jun 5, 2015 at 11:14 AM, Alex McWhirter <<a href="mailto:alexmcwhirter@triadic.us">alexmcwhirter@triadic.us</a><br>
</span><span class="">>> <mailto:<a href="mailto:alexmcwhirter@triadic.us">alexmcwhirter@triadic.us</a>>> wrote:<br>
>><br>
>> From what I understand, ovirt simply reports the available storage<br>
>> that the NFS server says it is free. Ovirt itself doesn't control the<br>
>> storage.<br>
>><br>
>> Under the storage tab click on the storage domain you're having issues<br>
>> with and check to see if the images themselves have been deleted or if<br>
>> they are still there. When you delete a virtual machine you have the<br>
>> option to delete the virtual image as well.<br>
>><br>
>> If a virtual machine has more than one image then I'm not sure how<br>
>> this is handled as I've only used single images for virtual machines.<br>
>> Any additional storage I need I handle over NFS directly to the<br>
>> virtual machine.<br>
>><br>
>> Perhaps ovirt doesn't automatically delete secondary images? Either<br>
>> way you should be able to delete them manually and reclaim space.<br>
>><br>
>> Sent from my iPhone<br>
>><br>
>> > On Jun 5, 2015, at 12:39 AM, smiling dream <<a href="mailto:smiling.dream@gmail.com">smiling.dream@gmail.com</a><br>
</span><span class="">>> <mailto:<a href="mailto:smiling.dream@gmail.com">smiling.dream@gmail.com</a>>> wrote:<br>
>> ><br>
>> > I have ovirt 3.5.1 installed with VDSM 4.16.14 EL6 node and NFS as<br>
>> storage . In my infrastructure i have multiple instance of centos /<br>
>> windows vm under ovirt and once guest vm disk space is used ovirt is<br>
>> not release guest vm disk space after delete .<br>
>> > Looking for help .<br>
>> ><br>
>> > Regards<br>
>> > Suvro<br>
>> > _______________________________________________<br>
>> > Users mailing list<br>
</span>>> > <a href="mailto:Users@ovirt.org">Users@ovirt.org</a> <mailto:<a href="mailto:Users@ovirt.org">Users@ovirt.org</a>><br>
>> > <a href="http://lists.ovirt.org/mailman/listinfo/users" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br>
>><br>
>><br>
><br>
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