[openstack-dev] [nova] Do any hyperviors allow disk reduction as part of resize ?

Darren J Moffat Darren.Moffat at Oracle.COM
Fri Jun 13 15:53:01 UTC 2014

On 06/13/14 16:37, Daniel P. Berrange wrote:
>> The xenapi implementation only works on ext[234] filesystems. That rules
>> >out *BSD, Windows and Linux distributions that don't use ext[234]. RHEL7
>> >defaults to XFS for instance.
> Presumably it'll have a hard time if the guest uses LVM for its image
> or does luks encryption, or anything else that's more complex than just
> a plain FS in a partition.

For example ZFS, which doesn't currently support device removal (except 
for mirror detach) or device size shrink (but does support device grow). 
  ZFS does support file system resize but file systems are "just" 
logical things within a storage pool (made up of 1 or more devices) so 
that has nothing to do with the block device size.

Darren J Moffat

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