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<p class="MsoNormal"><span style="color:#1F497D">Another example. This one was moved to a new storage domain<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">root@ovirt_host1> qemu-img info dd6f25f6-7830-4024-915f-a20268797c34<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">image: dd6f25f6-7830-4024-915f-a20268797c34<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">file format: raw<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">virtual size: 200G (214748364800 bytes)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">disk size: 5.0G<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">root@ ovirt_host1> cat dd6f25f6-7830-4024-915f-a20268797c34.meta<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DOMAIN=53560d43-874a-49c5-9c5a-8b90487c79f8<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">VOLTYPE=LEAF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">CTIME=1470305678<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">FORMAT=RAW<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">IMAGE=741976cd-d1cb-4031-bdbe-6a745dff16ef<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DISKTYPE=2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">PUUID=00000000-0000-0000-0000-000000000000<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">LEGALITY=LEGAL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">MTIME=0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">POOL_UUID=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">SIZE=419430400<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">TYPE=PREALLOCATED<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DESCRIPTION=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">EOF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">This one has not been moved:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">root@ny2-lvb-066.mgt> qemu-img info 155f0d33-c280-4236-8d1e-fcb88f9a1242<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">image: 155f0d33-c280-4236-8d1e-fcb88f9a1242<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">file format: raw<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">virtual size: 90G (96636764160 bytes)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">disk size: 90G<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">root@ny2-lvb-066.mgt> cat 155f0d33-c280-4236-8d1e-fcb88f9a1242.meta<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DOMAIN=59bde2ff-e10d-477e-91c1-6355abff0999<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">CTIME=1464946639<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">FORMAT=RAW<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DISKTYPE=2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">LEGALITY=LEGAL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">SIZE=188743680<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">VOLTYPE=LEAF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DESCRIPTION={"DiskAlias":"ny2-laa-010.prod_Disk1","DiskDescription":""}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">IMAGE=82158182-81a4-458e-a41b-663756962666<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">PUUID=00000000-0000-0000-0000-000000000000<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">MTIME=0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">POOL_UUID=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">TYPE=PREALLOCATED<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">EOF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">See the mismatch between “virtual size” and “disk size” on the one that was moved.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">TIA,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b>From:</b> users-bounces@ovirt.org [mailto:users-bounces@ovirt.org]
<b>On Behalf Of </b>Simon Barrett<br>
<b>Sent:</b> Friday, 5 August, 2016 10:25<br>
<b>To:</b> users@ovirt.org<br>
<b>Subject:</b> [ovirt-users] preallocated storage issue?<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I create a preallocated disk for a VM, I see the disk image file listing as the size I requested (100G):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">cd /rhev/data-center/mnt/storage_host1:_vol_pa1__nas__01b__oVirt__prod__01/53560d43-874a-49c5-9c5a-8b90487c79f8/images/d97f7706-3662-40bf-9358-80e0dc51bff4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">root@ovirt_host> ls -l<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">total 105064644<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-rw---- 1 vdsm kvm 107374182400 Aug 5 10:57 75c14559-e18f-4cc8-a3fe-bc0de507720b<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-rw---- 1 vdsm kvm 1048576 Aug 5 10:57 75c14559-e18f-4cc8-a3fe-bc0de507720b.lease<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-r--r-- 1 vdsm kvm 313 Aug 5 10:57 75c14559-e18f-4cc8-a3fe-bc0de507720b.meta<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">and the corresponding space used on disk matches<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">root@ ovirt_host > du -sh *<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">101G 75c14559-e18f-4cc8-a3fe-bc0de507720b<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">1.1M 75c14559-e18f-4cc8-a3fe-bc0de507720b.lease<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">4.0K 75c14559-e18f-4cc8-a3fe-bc0de507720b.meta<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I then migrate that storage (while the VM is shutdown) to a new storage domain, the size on disk does not match the allocated size. In this case there is nothing in the disk yet so it shows as 0.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">cd /rhev/data-center/mnt/storage_host2:_vol_pa1__ovirt__uatprod/1f2c2b48-1e77-4c98-a6da-5dc09b78cead/images/d97f7706-3662-40bf-9358-80e0dc51bff4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">root@ ovirt_host> ls -l<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">total 1032<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-rw---- 1 vdsm kvm 107374182400 Aug 5 11:06 75c14559-e18f-4cc8-a3fe-bc0de507720b<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-rw---- 1 vdsm kvm 1048576 Aug 5 11:06 75c14559-e18f-4cc8-a3fe-bc0de507720b.lease<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">-rw-r--r-- 1 vdsm kvm 313 Aug 5 11:06 75c14559-e18f-4cc8-a3fe-bc0de507720b.meta<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">root@ ovirt_host > du -sh *<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">0 75c14559-e18f-4cc8-a3fe-bc0de507720b<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">1.1M 75c14559-e18f-4cc8-a3fe-bc0de507720b.lease<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">4.0K 75c14559-e18f-4cc8-a3fe-bc0de507720b.meta<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">oVirt still lists the disk as preallocated in the GUI but it is in fact thin provisioned.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I see the same issue if I clone a preallocated VM. The size on disk ends up being the equivalent of a thin-provisioned disk. I also had the issue when importing VM’s from an export domain when I had selected preallocated in the import dialog
box.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this a known issue? Should preallocated not mean preallocated on physical disk?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ovirt Engine is running 3.6.4.1-1.el6<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The ovirt nodes are running: <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">OS Version: RHEL - 7 - 2.1511.el7.centos.2.10<o:p></o:p></p>
<p class="MsoNormal">Kernel Version: 3.10.0 - 327.4.5.el7.x86_64<o:p></o:p></p>
<p class="MsoNormal">KVM Version: 2.3.0 - 31.el7_2.7.1<o:p></o:p></p>
<p class="MsoNormal">LIBVIRT Version: libvirt-1.2.17-13.el7_2.2<o:p></o:p></p>
<p class="MsoNormal">VDSM Version: vdsm-4.17.23.2-0.el7.centos<o:p></o:p></p>
<p class="MsoNormal">SPICE Version: 0.12.4 - 15.el7<o:p></o:p></p>
<p class="MsoNormal">GlusterFS Version: [N/A]<o:p></o:p></p>
<p class="MsoNormal">CEPH Version: librbd1-0.80.7-3.el7<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
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