Re: [Xen-API] [Xen-users] XCP storage repository using VHD on top of the LVM (FC shared too) instead of the NFS.

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Mar 24, 2010 at 09:54:01PM +0000, Dave Scott wrote:
>    Hi,
> 

Hello Dave,

>    XCP does use VHD format on top of the LVs it creates on iSCSI/FC storage.
>    The current problem is that it doesn't support "thin provisioning" (i.e.
>    not pre-allocating). It's great for making snapshots and clones but not so
>    good for space usage... as you observed!
> 
>    There is an early prototype of an XCP/vhd storage daemon which has an LVM
>    implementation optimized for being able to quickly resize volumes. When
>    that stabilizes, we'll be able to have thin provisioning. We should put
>    the development repo for the prototype on xenbits somewhere.
> 

Any progress on supporting thinprov on block-storage ? 

Thanks,

-- Pasi


> 
>    Cheers,
> 
>    Dave
> 
> 
> 
>    From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>    [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Martinx -
>    ?????
>    Sent: 23 March 2010 20:47
>    To: Xen List
>    Subject: [Xen-users] XCP storage repository using VHD on top of the LVM
>    (FC shared too) instead of the NFS.
> 
> 
> 
>    Hi!
> 
>     I thinking why the XCP/XenServer has an option to use the VHD format only
>    for the NFS Servers... How to use the VHD on top of a local or shared LVM?
> 
>     I mean, I want to create a logical volume of 500G and within this volume,
>    I'll create the VHDs files instead LVs for each domU.
> 
>     And I'll use this setup on top of my FC IBM DS4700 shared storage...
> 
>     It is possible?! I want the good of both worlds, the space efficient
>    feature of the VHDs (not pre-allocating) with the speed of the local or
>    fiber channel storage.
> 
>    Thanks!
>    Thiago

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