Hi Anthony,
I tried storage xenmotion for two VMs created from the same template and here
is what I observed.
Initially, the template and root disks tree looks as follows
______ Template
|
Base-Disk.vhd ----------- VM1 - Root Disk
|_________VM2-Root Disk
After xenmotion of both the volumes of the vm to another primary store, the two
virtual disks for the two VMs do not share the base disk
Base-Disk1.vhd------VM1 - Root Disk
Base-Disk2.vhd------VM2 - Root Disk
So, after storage xenmotion, each root disk has a copy of the base disk in the
destination storage pool. Is this an issue?
Regards,
Devdeep
> -----Original Message-----
> From: Anthony Xu [mailto:xuefei...@citrix.com]
> Sent: Wednesday, January 09, 2013 7:21 AM
> To: cloudstack-dev@incubator.apache.org
> Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
>
> I assume clone is a kind of snapshot in the term of VHD chain, Does XenMotion
> has same restrictions on clone?
>
> For fast provision, right now , on XenServer, root disk is cloned from
> template.
> Before any snapshot, root disk is already a VHD with parent VHD which is
> template, do you know if this has any impact for XenMotion ?
>
>
> Anthony
>
> > -----Original Message-----
> > From: Hari Kannan [mailto:hari.kan...@citrix.com]
> > Sent: Tuesday, January 08, 2013 5:44 PM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > Hi Devdeep,
> >
> > Can you please elaborate on the restrictions, if any on XenMotion
> > implementation when a volume has snapshots?
> >
> > Hari
> >
> > -----Original Message-----
> > From: Devdeep Singh [mailto:devdeep.si...@citrix.com]
> > Sent: Wednesday, December 26, 2012 4:44 AM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > I have created an initial draft of the FS here
> > https://cwiki.apache.org/confluence/display/CLOUDSTACK/Enabling+Storag
> > e
> > +XenMotion+for+XenServer. I'll keep updating it based on discussion
> > +XenMotion+for+and
> > comments.
> >
> > Regards,
> > Devdeep
> >
> > > -----Original Message-----
> > > From: Devdeep Singh [mailto:devdeep.si...@citrix.com]
> > > Sent: Tuesday, December 18, 2012 2:10 PM
> > > To: cloudstack-dev@incubator.apache.org
> > > Subject: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> > >
> > > Hi,
> > >
> > > XenServer introduced support for Storage XenMotion in the latest
> > > version (6.1). Storage XenMotion allows VMs to be moved from one
> > > host to another, where the VMs are not located on storage shared
> > > between the two hosts. It provides the option to live migrate a VM's
> > > disks along with the VM itself. It is now possible to migrate a VM
> > > from one resource pool to another, or to migrate a VM whose disks
> > > are on local storage, or even to migrate a VM's disks from one
> > > storage repository to another, all while the VM is running. More
> > > information on Storage
> > XenMotion can be found at [1].
> > >
> > > I have filed a jira request [2] to track this feature. I plan to
> > > extend the migrate vm cloudstack api call to allow migration of
> > > instances across clusters. Do let me know your comments.
> > >
> > > [1] http://blogs.citrix.com/2012/08/24/storage_xenmotion/
> > > [2] https://issues.apache.org/jira/browse/CLOUDSTACK-659
> > >
> > > Regards,
> > > Devdeep
