Bug 817960

Summary: Support LVM device stacks
Product: Red Hat Enterprise Linux 6 Reporter: Alasdair Kergon <agk>
Component: lvm2Assignee: LVM and device-mapper development team <lvm-team>
Status: CLOSED DEFERRED QA Contact: cluster-qe <cluster-qe>
Severity: medium Docs Contact:
Priority: high    
Version: 6.4CC: agk, dwysocha, heinzm, jbrassow, mcsontos, msnitzer, prajnoha, prockai, pvrabec, thornber, zkabelac
Target Milestone: rcKeywords: FutureFeature
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
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Clone Of: Environment:
Last Closed: 2015-09-30 20:51:11 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Alasdair Kergon 2012-05-01 21:16:55 UTC 
With LVM supporting an increasing number of target types, a more-sophisticated way of handling stacks of them than the pure PV-on-LV approach is needed.

Investigate the alternatives and decide.


- An incremental lvconvert-style approach?
  (lots of special cases?)

- A more generic extension to the LVM framework?

VGs inside VGs conceptually (i.e. collapsing the PV-on-LV stack into a single VG)?
- allocate upon 'free' sections of LVs?  tagged?
Comment 2 RHEL Program Management 2012-05-05 04:14:59 UTC 
Since RHEL 6.3 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
Comment 3 Tom Lavigne 2012-09-07 15:22:50 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 4 Jonathan Earl Brassow 2015-09-30 20:51:11 UTC 
We have a handful of stacks which are supported, but generalized stacking will not be supported in rhel6