Bug 840933

Summary: Do not submit multiple jobs referring to the same VM image (KVM)
Product: Red Hat Enterprise MRG Reporter: Luigi Toscano <ltoscano>
Component: Release_NotesAssignee: Tomas Capek <tcapek>
Status: CLOSED CURRENTRELEASE QA Contact: ecs-bugs
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 2.2CC: matt
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Release Note
Doc Text:
When multiple VM universe jobs refer to the same VM image, they are not prevented from using the image at the same time in KVM. Multiple jobs, represented by qemu-kvm processes, accessing the same VM image can cause data corruption. To work around this bug, do not submit multiple jobs referring to the same VM image.
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Clone Of: Environment:
Last Closed: 2012-09-20 12:37:45 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Luigi Toscano 2012-07-17 16:23:48 UTC 
Description of problem:
The problem is described into rhbz839961: when multiple VM universe jobs refer to the same VM image, they are not prevented to using it at the same time in KVM. Multiple jobs (i.e. multiple qemu-kvm processes) accessing the same VM image can easily lead to data corruption.
The issue is not scheduled for inclusion in the next version of MRG (2.2), hence the request for inclusion into release notes (even if it is not a regression).
Comment 1 Tomas Capek 2012-08-30 15:42:03 UTC 
Added to:

Red_Hat_Enterprise_MRG-MRG_Release_Notes-2-en-US-1-8.2

http://documentation-devel.engineering.redhat.com/docs/en-US/Red_Hat_Enterprise_MRG/2/html/MRG_Release_Notes/chap-MRG_Release_Notes-GRID.html#Grid_Known_Issues_2.2