[ovirt-users] Re: Storage domain format version info

[Vojtech Juranek]

Hi,

> part of updating a DC from 4.2 to 4.3 consists in updating format of data
> storage domains from V4 to V5.
> Questions:
> - where can I find list of differences between V4 and V5? And in general
> between previous ones?

I'm afraid there's no design doc for it. Here's list of changes:

* domain metadata
  * added: alignment, block_size
  * removed: logblksize, phyblksize

* volume metadata
  * added: cap (replacement for size, capacity is size in bytes, while size 
was in mutiples of block size (512B))
  * removed mtime, pool_uuid, size

If you want more details about the changes, you can check slides [1]

> - can I force only a particular storage domain to remain in V4 while having
> the other ones upgraded to V5, for any reason? Or the reverse: update only
> one of the defined domains?

I don't think this is possible. 

HTH
Vojta

[1] https://github.com/vjuranek/presentations/blob/master/internal/oVirt/
storage_v5/storage_v5.pdf

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[ovirt-users] Re: Storage domain format version info

[Andreas Elvers]

I'd like to add a question on storage domains.

When will storage domains become obsolete? Like kind of a road map.

I'm asking because we are operating a OpenStack Cinder V1 Domain to access Ceph 
RBD images. I know this is only a former tech preview, but this preview is 
doing solid work. So I'd like to know, when this will go away. 
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