[Openstack-operators] Removal of support for sparse LVM volumes from Nova

Chris Friesen chris.friesen at windriver.com
Tue Jan 31 15:12:06 UTC 2017

On 01/30/2017 09:48 AM, Matthew Booth wrote:
> As noted here https://bugs.launchpad.net/mos/+bug/1591084 (a MOS bug, but also
> confirmed upstream and in RHOS), this is broken. By the looks of it, it has
> never worked and would require architectural changes to make it work.
> I'm assuming this means that nobody could possibly be using it, and that nobody
> will be sad if I remove all traces of it in its current form. If anybody is
> using it, or knows of anybody using it, could you let me know? What workarounds
> are you using?
> Secondly, if it did work is anybody interested in this feature?

We don't care about sparse LVM, but we do use thinly-provisioned LVM in nova. 
This avoids the "zero out the volume all at once" cost in exchange for some 
additional overhead when allocating disk blocks.


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