Re: [Xen-API] XCP 1.6 Storage XenMotion - need to delete temporary VDI files

[Alexandre Kouznetsov <alk@xxxxxxxxxx>]

Hello.

You hijacked my thread!

El 03/01/13 12:10, admin@xxxxxxxxxxx escribió:
> What is the right way to clean up those temp VDI?  Should I use
> vdi-forget or vdi-destroy?
That depends of what you want, they behave differently.

vdi-forget leaves the storage (file or logical volume) in it's place, 
but removes all the reference to it in XCP cluster's database. It can be 
used back with a vdi-introduce.
vdi-destroy removes the references to the VDI and the actual storage volume.

Any temporal VDIs are supposed to be cleaned automatically, unless 
something went wrong with the migration process, which is probably your 
case. You may delete them using vdi-destroy (watch twice what you type 
before hit enter) or from XenCenter (it will tell which VDIs are not 
used by any VM, handful).
>  How can I make sure the VM does not need the
> temp VDI that are still assigned to it?
In case of a clean migration, it should not leave any temporal VDI 
behind. If the migration was not clean, it better leave VDIs in place, 
making sure you don't loose data.
In any case, a VDI can be detached from a VM by removing the 
corresponding VBD, which is the bond between the VM and the actual VDI. 
Store in a safe place the output of "xe vbd-param-list uuid=..." for 
reference, in case you need to attach the storage back to the VM.

> I found the following text in the release notes for XCP 1.6 and XS 6.1:
> When migrating VMs using Storage XenMotion, attempts to cancel the
> operation may not delete the temporary virtual disks. [CA-87710] [CA-87689]
That's it.

> I could not find the CA-87710 or CA-87689 documents.  If those docs have
> the steps for manually cleaning up the temporary virtual disks, please
> post the links to those documents.
Yes, that is mentioned in the XenServer 6.1.0 Release Notes:
http://support.citrix.com/article/CTX134582

The reference about the manual cleaning can be found in XenServer 6.1.0 
Administrator's Guide:
http://docs.vmd.citrix.com/XenServer/6.1.0/1.0/en_gb/reference.html

Cheers.

--
Alexandre Kouznetsov


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