Bug 1109920 - Live Merge: Extend internal block volumes during merge
Summary: Live Merge: Extend internal block volumes during merge
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: oVirt
Classification: Retired
Component: vdsm
Version: 3.5
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
: 3.5.0
Assignee: Adam Litke
QA Contact: Kevin Alon Goldblatt
URL:
Whiteboard: storage
Depends On: 1041569 1158094
Blocks: 647386 1073943 1196199
TreeView+ depends on / blocked
 
Reported: 2014-06-16 15:49 UTC by Adam Litke
Modified: 2016-02-10 16:37 UTC (History)
11 users (show)

Fixed In Version: v4.16.4
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-10-17 12:23:42 UTC
oVirt Team: Storage
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
oVirt gerrit 31268 0 master MERGED Live Merge: Extend internal block volumes during merge Never
oVirt gerrit 31364 0 master MERGED Live Merge: Return more info from _driveGetActualVolumeChain Never
oVirt gerrit 31365 0 master MERGED Live Merge: Update path using libvirt supplied value Never
oVirt gerrit 31366 0 master MERGED Live Merge: Get volume chain for multiple drives Never
oVirt gerrit 32319 0 ovirt-3.5 MERGED Live Merge: Return more info from _driveGetActualVolumeChain Never
oVirt gerrit 32320 0 ovirt-3.5 MERGED Live Merge: Update path using libvirt supplied value Never
oVirt gerrit 32322 0 ovirt-3.5 MERGED Live Merge: Get volume chain for multiple drives Never
oVirt gerrit 32323 0 ovirt-3.5 MERGED Live Merge: Extend internal block volumes during merge Never
oVirt gerrit 32327 0 ovirt-3.5 MERGED virt: Resolve snapshot type after prepareVolumePath Never

Description Adam Litke 2014-06-16 15:49:07 UTC 
Description of problem:
Due to a missing libvirt API for retrieving the write watermark for all volumes in an image's backing chain, vdsm will not currently extend the volume that is being written to during a live merge operation.  Until fixed, this will result in failed live merges for sparse block-based disks.  Once the API is defined in libvirt, add support to vdsm to start merging internal volumes.

Related gerrit patch http://gerrit.ovirt.org/#/c/28620/ uses a qemu monitor command to provide the required information but it is not mergeable due to the unsupportability of custom monitor commands.
Comment 1 Adam Litke 2014-06-16 15:49:37 UTC 
Implementation in progress.
Comment 2 Sandro Bonazzola 2014-10-17 12:23:42 UTC 
oVirt 3.5 has been released and should include the fix for this issue.
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