Hi Donal,

I didn't try thin provisioning on a local LVM disk but I would expect that is 
takes only few MB. Does CS support thin on local storage (LVM)?

I can see where you question is going but a data disk,even empty would create a 
dependency to the hypervisor. 
The idea for using disk less boot is not to create any dependency on storage 
and only rely on memory/CPU. If the hypervisor goes down I just start the VM in 
a new one. 
A data disk would be here blocking and you have to remove the data disk from 
the VM before you can do any action on the VM. Doubt that would work in CS. 

Bjoern 

On Mar 18, 2013, at 4:00 AM, "Donal Lafferty" <donal.laffe...@citrix.com> wrote:

> Let me rephrase that,
> 
> Hi Bjoern,
> 
> On the KVM deployment you are using, I take it that the 1 gig disk is a data 
> disk.  It the problem that its unwieldy to manage or that 1 gig takes up too 
> much room?
> 
> Does the 1 gig data disk take up a lot of space on the primary storage?
> 
> DL
> 
> 
>> -----Original Message-----
>> From: Mathias Mullins [mailto:mathias.mull...@citrix.com]
>> Sent: 18 March 2013 10:53 AM
>> To: cloudstack-users@incubator.apache.org
>> Subject: Re: diskless boot
>> 
>> Thin or thick provisioned? On what type of file system?
>> 
>> Thank you,
>> Matt
>> 
>> On Mar 18, 2013, at 9:47 PM, "Donal Lafferty" <donal.laffe...@citrix.com>
>> wrote:
>> 
>>> Out of interest, how much space does an unused 1 Gig disk take up on a
>> hypervisor?
>>> 
>>> DL
>>> 
>>>> -----Original Message-----
>>>> From: Bjoern Teipel [mailto:bjoern.tei...@internetbrands.com]
>>>> Sent: 16 March 2013 6:12 AM
>>>> To: cloudstack-users@incubator.apache.org
>>>> Subject: diskless boot
>>>> 
>>>> Hi guys,
>>>> 
>>>> one of my questions is still open:
>>>> 
>>>> - CS doesn't support booting over ISO only without attaching a disk.
>>>>   Background is, we migrate our datacenter to boot from ISO/PXE and
>>>>   thats a big no go for me if I'm enforced to assign a 1G disk.
>>>>   Also set the minimum disk size to 0G in the global settings but
>>>>   I can't create "No Disk" Disk offerings ...
>>>> 
>>>> Nobody had the desire to boot disk less other than me ?
>>>> Can't believe that ;-)
>>>> 
>>>> Thanks,
>>>> Bjoern
>>> 

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