Storage domain format version info
Hello, 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? - 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? Eg on oVirt web site I only found this for V4 https://www.ovirt.org/develop/release-management/features/storage/storage_do... with mention about Qcow2 v3 (link broken.. one ot the upstream pages for it here: https://wiki.qemu.org/Features/Qcow3 ) that should give near raw performance with advantages of qcow2 format... Thanks, Gianluca
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.
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
participants (3)
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Andreas Elvers -
Gianluca Cecchi -
Vojtech Juranek