I never liked the idea of Thin Provisioning. With the relative low cost of
disk space, I don't think it's worth baby sitting your storage pools to
ensure enough free space is available. That's just my opinion of course.

- Sean


On Wed, Jan 26, 2011 at 8:03 AM, Paul Hutchings
<[email protected]>wrote:

>  Mind if I ask why you use thick for your guests?
>
>
>
> This is our first SAN that does thin, and our first experience of vsphere
> that supports thin – seems a no brainer to go thin with the obvious caveat
> of if your environment means over-provisioning could creep up on your very
> quickly.
>
> *From:* Steven Peck [mailto:[email protected]]
> *Sent:* 26 January 2011 16:58
>
> *To:* NT System Admin Issues
> *Subject:* Re: Moving VM's between vCenter clusters?
>
>
>
> With ESXi 4.1, when we to a storage motion, we haev three options.  Leave
> the same, thin format, thick format.  We store our templates in thin format
> and our guest systems are thick format.  Occasionally we miss one setting
> change when deploying new guests so we smotion them to correct it.
>
> Steven Peck
> http://www.blkmtn.org
>
>  On Wed, Jan 26, 2011 at 8:37 AM, Paul Hutchings <
> [email protected]> wrote:
>
> My understanding is that when migrating to vsphere 4.1 that the same as
> with a new VM, you can choose to move the thick VMDK or you can move it and
> reprovision it as a thin VMDK, in which case running sdelete first just
> optimizes how much space vsphere thinks is in use within the VMDK.
>
> *From:* Ken Cornetet [mailto:[email protected]]
> *Sent:* 26 January 2011 16:34
>
>
> *To:* NT System Admin Issues
>
> *Subject:* RE: Moving VM's between vCenter clusters?
>
>
>
> I don’t think the thin provisioning is relevant. The vmdk files will be
> moved as they are.
>
>
>
> *From:* Paul Hutchings [mailto:[email protected]]
> *Sent:* Wednesday, January 26, 2011 10:09 AM
> *To:* NT System Admin Issues
> *Subject:* Moving VM's between vCenter clusters?
>
>
>
> I have a new SAN and vCenter server and vSphere hosts which I’m finalizing
> testing.
>
>
>
> One thing I’ve not been able to easily try is how to get the VM’s off my
> existing hosts and onto the new hosts.
>
>
>
> My understanding is that I should be able to simply join the current
> vSphere boxes (ESX 3.5) to the new vCenter and from there, do a migration
> (offline) of the VM’s to the new servers and storage.
>
>
>
> I’m using thin provisioning on the new SAN and within vSphere so I need to
> run something like sdelete in each existing VM to zero the free space, but
> other than that, have I missed anything blindingly obvious please?
>
>
>
> Thanks,
>
> Paul
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