Bug 666675

Summary: [RFE] Support simultaneous snapshot of multiple LVs from different VGs
Product: Red Hat Enterprise Linux 7 Reporter: Ayal Baron <abaron>
Component: lvm2Assignee: LVM and device-mapper development team <lvm-team>
lvm2 sub component: Thin Provisioning QA Contact: Corey Marthaler <cmarthal>
Status: CLOSED DUPLICATE Docs Contact:
Severity: medium    
Priority: high CC: agk, bernhard.furtmueller, dwysocha, heinzm, iheim, jbrassow, joe.thornber, msnitzer, prajnoha, prockai, ssaha, thornber, zkabelac
Version: 7.0Keywords: FutureFeature, Triaged
Target Milestone: pre-dev-freeze   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-04-09 18:45:14 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 636037, 773482    
Bug Blocks: 756082    

Description Ayal Baron 2011-01-02 07:42:59 UTC 
Description of problem:
In RHEVM, a Virtual Machine can have multiple disk images spread across multiple LVs. Right now, these images are limited to the same VG, but we are going to remove this limitation.
In order to take a consistent, "live" snapshot of the entire machine, we will need to be able to snapshot multiple LVs from different VGs simultaneously (pause multiple kernel targets?).
This was discussed with Alasdair, who raised a concern about running out of memory if done in kernel.

This is only needed to work with the new snapshots (see BZ#636037), not the existing snapshots.
Comment 1 Sayan Saha 2011-05-27 12:29:00 UTC 
Current capacities do not allow inclusion of this RFE in RHEL 6.2. Moving this out to RHEL 6.3 for re-consideration.
Comment 2 Peter Rajnoha 2012-01-04 14:34:02 UTC 
Let's settle the new snapshot code in place first, I'm moving this additional RFE for 6.4.
Comment 4 RHEL Program Management 2012-07-10 07:22:18 UTC 
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.
Comment 5 RHEL Program Management 2012-07-10 23:56:15 UTC 
This request was erroneously removed from consideration in Red Hat Enterprise Linux 6.4, which is currently under development.  This request will be evaluated for inclusion in Red Hat Enterprise Linux 6.4.
Comment 6 Tom Lavigne 2012-09-07 15:18:50 UTC 
This request was evaluated by Red Hat Product Management for 
inclusion in the current release of Red Hat Enterprise Linux.
Since we are unable to provide this feature at this time,  
it has been proposed for the next release of 
Red Hat Enterprise Linux.
Comment 10 Jonathan Earl Brassow 2015-04-09 18:45:14 UTC 

*** This bug has been marked as a duplicate of bug 666674 ***