Bug 732462
| Summary: | RFE: LVM RAID - Support RAID1 down-convert | ||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jonathan Earl Brassow <jbrassow> |
| Component: | lvm2 | Assignee: | Jonathan Earl Brassow <jbrassow> |
| Status: | CLOSED ERRATA | QA Contact: | Corey Marthaler <cmarthal> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.2 | CC: | agk, dwysocha, heinzm, jbrassow, mbroz, prajnoha, prockai, slevine, thornber, zkabelac |
| Target Milestone: | rc | Keywords: | FutureFeature |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | lvm2-2.02.95-1.el6 | Doc Type: | Enhancement |
| Doc Text: |
New Feature to 6.3. No documentation required.
Bug 732458 is the bug that requires a release note for the RAID features. Other documentation is found in the LVM manual.
Operational bugs need no documentation because they are being fixed before their initial release.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-06-20 14:52:09 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: | |||
| Bug Blocks: | 732458, 749672, 756082 | ||
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Description
Jonathan Earl Brassow
2011-08-22 14:35:26 UTC
Release criteria (test requirements): Ensure that the number of images can be reduced and that both the metadata and data sub-lvs (e.g. *_rimage_*, *_rmeta_*) are removed together with no residual device-mapper devices. If the LV is down-converted to a linear LV, then all the metadata sub-lvs should have been removed. There also should be no *_rimage_* sub-lvs either, since the final remaining raid1 image should be the top-level linear LV. Further requirements: The format of the command (while not given above) is the same as that for the "mirror" segment type: ~> lvconvert -m <new_absolute_count> vg/lv [removable_PVs] ~> lvconvert -m -<num_fewer_images> vg/lv [removable_PVs] The user should be able to specify which devices will be removed from the RAID array. This should be validated. Additionally, when an image (and it's metadata LV) are removed, any higher numbered images will be "shifted down" to fill the slot. That is, a 3-way RAID1 array with lv_rimage_[012] sub_lvs that has lv_rimage_1 removed should result in lv_rimage_[01] as the final sub-lvs. lv_rimage_2 will be renamed and take over the empty slot, becoming lv_rimage_1. Adding QA ack for 6.3. Devel will need to provide unit testing results however before this bug can be ultimately verified by QA. changes upstream in version 2.02.89 Bug is covered by LVM testsuite (lvconvert-raid.sh). CLI demonstration: [root@bp-01 ~]# devices vg LV Copy% Devices lv 100.00 lv_rimage_0(0),lv_rimage_1(0),lv_rimage_2(0) [lv_rimage_0] /dev/sde1(1) [lv_rimage_1] /dev/sdf1(1) [lv_rimage_2] /dev/sdg1(1) [lv_rmeta_0] /dev/sde1(0) [lv_rmeta_1] /dev/sdf1(0) [lv_rmeta_2] /dev/sdg1(0) [root@bp-01 ~]# lvconvert -m1 vg/lv [root@bp-01 ~]# devices vg LV Copy% Devices lv 100.00 lv_rimage_0(0),lv_rimage_1(0) [lv_rimage_0] /dev/sde1(1) [lv_rimage_1] /dev/sdf1(1) [lv_rmeta_0] /dev/sde1(0) [lv_rmeta_1] /dev/sdf1(0) [root@bp-01 ~]# lvconvert -m0 vg/lv [root@bp-01 ~]# devices vg LV Copy% Devices lv /dev/sde1(1) [root@bp-01 ~]# dmsetup ls | grep vg- vg-lv (253, 9) In comment 6, I don't see an example that specifies which devices are to be removed (the removable_PVs option). Is there an example of this? Steve, The example in comment #6 could have been: #> lvconvert -m 1 vg/lv /dev/sdg1 IOW, (as eluded to in comment 2) if you want specific devices removed, you can specify them at the end of the command. The basic raid1 downconvert cases work. Marking this feature verified in the latest rpms. 2.6.32-251.el6.x86_64 lvm2-2.02.95-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 lvm2-libs-2.02.95-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 lvm2-cluster-2.02.95-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 udev-147-2.40.el6 BUILT: Fri Sep 23 07:51:13 CDT 2011 device-mapper-1.02.74-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 device-mapper-libs-1.02.74-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 device-mapper-event-1.02.74-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 device-mapper-event-libs-1.02.74-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012 cmirror-2.02.95-4.el6 BUILT: Wed Apr 11 09:03:19 CDT 2012
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New Contents:
New Feature to 6.3. No documentation required.
Bug 732458 is the bug that requires a release note for the RAID features. Other documentation is found in the LVM manual.
Operational bugs need no documentation because they are being fixed before their initial release.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2012-0962.html |