Bug 844492
| Summary: | LVM RAID: Support 2-way mirror RAID10 | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jonathan Earl Brassow <jbrassow> | |
| Component: | lvm2 | Assignee: | Jonathan Earl Brassow <jbrassow> | |
| Status: | CLOSED ERRATA | QA Contact: | Cluster QE <mspqa-list> | |
| Severity: | low | Docs Contact: | ||
| Priority: | high | |||
| Version: | 6.3 | CC: | agk, cmarthal, dwysocha, heinzm, jbrassow, msnitzer, nperic, prajnoha, prockai, slevine, thornber, zkabelac | |
| Target Milestone: | rc | |||
| Target Release: | --- | |||
| Hardware: | Unspecified | |||
| OS: | Unspecified | |||
| Whiteboard: | ||||
| Fixed In Version: | lvm2-2.02.98-1.el6 | Doc Type: | Release Note | |
| Doc Text: |
LVM Support for 2-way Mirror RAID10
LVM is now capable of creating, removing, and resizing RAID10 logical volumes. To create a RAID10 logical volume, like the other RAID types, specify the segment type as follows:
~]# lvcreate --type raid10 -m 1 -i 2 -L 1G -n lv vg
Note that the -m and -i arguments behave in the same way they would for other segment types. That is, -i is the total number of stripes while -m is the number of (additional) copies (that is, -m 1 -i 2 gives 2 stripes on top of 2-way mirrors).
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Story Points: | --- | |
| Clone Of: | ||||
| : | 857209 (view as bug list) | Environment: | ||
| Last Closed: | 2013-02-21 08:13:08 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: | ||||
| Bug Depends On: | 886658, 889358 | |||
| Bug Blocks: | 857209 | |||
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Description
Jonathan Earl Brassow
2012-07-30 22:10:53 UTC
TEST REQUIREMENTS: Simply put, perform all the tests on a RAID10 LV that are performed on a RAID1 or RAID4/5/6 LV. This includes, but shouldn't be limited to: 1) Create RAID10 LV 2) Remove RAID10 LV 3) Resize RAID10 LV 4) Data consistency checking 5) Device failure testing Adding QA ack for 6.4. Devel will need to provide unit testing results however before this bug can be ultimately verified by QA. LVM test suite passes with the following changes made to test this new feature: - creation of RAID10 LVs [lvcreate-raid.sh] -- does not allow more than 2-way mirror -- does allow more than 2-way stripe - replacement of devices [lvconvert-raid.sh] -- replacement of any single device succeeds (while in-sync) -- replacement of more than 1 dev in a mirror group fails -- replacement of 1 dev from each mirror group will succeed - resize LV [lvresize-raid.sh] -- extend LV -- reduce LV For consistency testing, I only made a file system on the LV, mounted it, and did kernel untars and removals. commit 4047e4dfb16175daec348bf44032c02181bd4c70
Author: Jonathan Brassow <jbrassow>
Date: Fri Aug 24 15:34:19 2012 -0500
RAID: Add support for RAID10
This patch adds support for RAID10. It is not the default at this
stage. The user needs to specify '--type raid10' if they would like
RAID10 instead of stacked mirror over stripe.
Ran both black_bird and raid_sanity test for 3 iterations without issues. I am marking this as verified even though there are some hickups with the whole mirrored stripe leg failuire of raid10 (which effectively kills raid10, as expected but could maybe be 'more graceful'). Verified with: lvm2-2.02.98-8.el6.x86_64 lvm2-libs-2.02.98-8.el6.x86_64 lvm2-cluster-2.02.98-8.el6.x86_64 device-mapper-1.02.77-8.el6.x86_64 udev-147-2.45.el6.x86_64 kernel-2.6.32-354.el6.x86_64 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-2013-0501.html |