Bug 983600
| Summary: | 'Contiguous' policy should partition the tags across the areas if cling tags are defined in lvm.conf | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jose Castillo <jcastillo> |
| Component: | lvm2 | Assignee: | Alasdair Kergon <agk> |
| lvm2 sub component: | Changing Logical Volumes (RHEL6) | QA Contact: | cluster-qe <cluster-qe> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | medium | ||
| Priority: | high | CC: | agk, cmarthal, dwysocha, heinzm, jbrassow, msnitzer, nperic, pablo.iranzo, prajnoha, prockai, thornber, zkabelac |
| Version: | 6.4 | ||
| Target Milestone: | beta | ||
| Target Release: | 6.7 | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | lvm2-2.02.118-2.el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-07-22 07:36:57 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: | |||
| Bug Blocks: | 1075802, 1159926 | ||
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Description
Jose Castillo
2013-07-11 14:25:07 UTC
This appears to only affect raid1 and mirror types. The allocation works with all other raid volumes (4,5,6,10). [root@host-112 ~]# vgs raid_sanity -o pv_name,pv_tags -O pv_name PV PV Tags /dev/sda1 A /dev/sda2 A /dev/sdb1 A /dev/sdb2 B /dev/sdd1 B /dev/sdd2 B [root@host-112 ~]# lvcreate --alloc cling_by_tags --type raid1 -n cling_raid -L 600M raid_sanity Insufficient suitable allocatable extents for logical volume cling_raid: 28 more required [root@host-112 ~]# lvcreate --alloc cling_by_tags --type raid6 -n cling_raid -L 600M raid_sanity Rounding size (150 extents) up to stripe boundary size (152 extents). Logical volume "cling_raid" created. [root@host-112 ~]# lvs -a -o +devices LV VG Attr LSize Cpy%Sync Devices cling_raid raid_sanity rwl-a-r--- 608.00m 62.50 cling_raid_rimage_0(0),cling_raid_rimage_1(0),cling_raid_rimage_2(0),cling_raid_rimage_3(0),cling_raid_rimage_4(0),cling_raid_rimage_5(0) [cling_raid_rimage_0] raid_sanity Iwl-aor--- 152.00m /dev/sda1(1) [cling_raid_rimage_1] raid_sanity Iwl-aor--- 152.00m /dev/sda2(1) [cling_raid_rimage_2] raid_sanity Iwl-aor--- 152.00m /dev/sdb1(1) [cling_raid_rimage_3] raid_sanity Iwl-aor--- 152.00m /dev/sdb2(1) [cling_raid_rimage_4] raid_sanity Iwl-aor--- 152.00m /dev/sdd1(1) [cling_raid_rimage_5] raid_sanity Iwl-aor--- 152.00m /dev/sdd2(1) [cling_raid_rmeta_0] raid_sanity ewl-aor--- 4.00m /dev/sda1(0) [cling_raid_rmeta_1] raid_sanity ewl-aor--- 4.00m /dev/sda2(0) [cling_raid_rmeta_2] raid_sanity ewl-aor--- 4.00m /dev/sdb1(0) [cling_raid_rmeta_3] raid_sanity ewl-aor--- 4.00m /dev/sdb2(0) [cling_raid_rmeta_4] raid_sanity ewl-aor--- 4.00m /dev/sdd1(0) [cling_raid_rmeta_5] raid_sanity ewl-aor--- 4.00m /dev/sdd2(0) https://www.redhat.com/archives/lvm-devel/2015-April/msg00050.html plus several earlier preparatory patches that enhanced the logging to expose the tag clinging behaviour: Considering allocation area 0 as /dev/loop10 start PE 0 length 2 leaving 22 with PV tags: tag1,tag3. Considering allocation area 1 as /dev/loop11 start PE 0 length 2 leaving 22 with PV tags: tag3. Eliminating allocation area 1 at PV /dev/loop11 start PE 0 from consideration: PV tag tag3 already used. This code should work for straightforward partitioning using tags but it won't necessarily solve obscure cases where multiple tags are overlapping. (Many of those cases could be solved without very much more work, but I've no reason to believe that anyone needs them so I've not done it.) [root@tardis-02 ~]# pvs -o+pv_tags PV VG Fmt Attr PSize PFree PV Tags /dev/sda2 vg_tardis02 lvm2 a-- 278.88g 0 /dev/sdb1 test_cbt lvm2 a-- 93.12g 93.12g A /dev/sdc1 test_cbt lvm2 a-- 93.12g 93.12g A /dev/sdd1 test_cbt lvm2 a-- 93.12g 93.12g A /dev/sde1 test_cbt lvm2 a-- 93.12g 93.12g B /dev/sdf1 test_cbt lvm2 a-- 93.12g 93.12g B /dev/sdg1 test_cbt lvm2 a-- 93.12g 93.12g B [root@tardis-02 ~]# lvcreate -d --alloc cling_by_tags --type mirror -m1 -n mirror -L 94G --nosync test_cbt WARNING: New mirror won't be synchronised. Don't read what you didn't write! Logical volume "mirror" created. [root@tardis-02 ~]# lvcreate -d --alloc cling_by_tags --type raid1 -m1 -n raid1 -L 98G --nosync test_cbt WARNING: New raid1 won't be synchronised. Don't read what you didn't write! Logical volume "raid1" created. Marking this VERIFIED by: lvm2-2.02.118-2.el6.x86_64 Types mirror and raid1 now work, however the striped raids (raid4,5,6,10) have appeared to regress in the latest build. Moving back to ASSIGNED. lvm2-2.02.118-1.el6 [root@host-075 ~]# pvs -a -o +pv_tags | grep raid_sanity /dev/sda1 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sda2 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sdc1 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sdc2 raid_sanity lvm2 a-- 548.00m 548.00m B /dev/sdd1 raid_sanity lvm2 a-- 548.00m 548.00m B /dev/sdd2 raid_sanity lvm2 a-- 548.00m 548.00m B [root@host-075 ~]# lvcreate --alloc cling_by_tags --type raid1 -m 1 -n cling_raid -L 600M raid_sanity Insufficient suitable allocatable extents for logical volume cling_raid: 28 more required [root@host-075 ~]# lvcreate --alloc cling_by_tags --type raid4 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. [root@host-075 ~]# lvcreate --alloc cling_by_tags --type raid5 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. [root@host-075 ~]# lvcreate --alloc cling_by_tags --type raid6 -i 3 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. [root@host-075 ~]# lvcreate --alloc cling_by_tags --type raid10 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. lvm2-2.02.118-2.el6 [root@host-076 ~]# pvs -a -o +pv_tags | grep raid_sanity /dev/sda1 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sda2 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sdc1 raid_sanity lvm2 a-- 548.00m 548.00m A /dev/sdc2 raid_sanity lvm2 a-- 548.00m 548.00m B /dev/sdd1 raid_sanity lvm2 a-- 548.00m 548.00m B /dev/sdd2 raid_sanity lvm2 a-- 548.00m 548.00m B [root@host-076 ~]# lvcreate --alloc cling_by_tags --type raid1 -m 1 -n cling_raid -L 600M raid_sanity Logical volume "cling_raid" created. [root@host-076 ~]# lvcreate --alloc cling_by_tags --type raid4 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Insufficient suitable allocatable extents for logical volume cling_raid: 152 more required # WITHOUT --ALLOC CLING_BY_TAGS [root@host-076 ~]# lvcreate --type raid4 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. [root@host-076 ~]# lvs -a -o +devices LV Attr LSize Cpy%Sync Devices cling_raid rwi-a-r--- 600.00m 43.33 cling_raid_rimage_0(0),cling_raid_rimage_1(0),cling_raid_rimage_2(0) [cling_raid_rimage_0] Iwi-aor--- 300.00m /dev/sda1(1) [cling_raid_rimage_1] Iwi-aor--- 300.00m /dev/sda2(1) [cling_raid_rimage_2] Iwi-aor--- 300.00m /dev/sdc1(1) [cling_raid_rmeta_0] ewi-aor--- 4.00m /dev/sda1(0) [cling_raid_rmeta_1] ewi-aor--- 4.00m /dev/sda2(0) [cling_raid_rmeta_2] ewi-aor--- 4.00m /dev/sdc1(0) [root@host-076 ~]# lvcreate --alloc cling_by_tags --type raid5 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Insufficient suitable allocatable extents for logical volume cling_raid: 152 more required # WITHOUT --ALLOC CLING_BY_TAGS [root@host-076 ~]# lvcreate --type raid5 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Logical volume "cling_raid" created. [root@host-076 ~]# lvs -a -o +devices LV Attr LSize Cpy%Sync Devices cling_raid rwi-a-r--- 600.00m 50.00 cling_raid_rimage_0(0),cling_raid_rimage_1(0),cling_raid_rimage_2(0) [cling_raid_rimage_0] Iwi-aor--- 300.00m /dev/sda1(1) [cling_raid_rimage_1] Iwi-aor--- 300.00m /dev/sda2(1) [cling_raid_rimage_2] Iwi-aor--- 300.00m /dev/sdc1(1) [cling_raid_rmeta_0] ewi-aor--- 4.00m /dev/sda1(0) [cling_raid_rmeta_1] ewi-aor--- 4.00m /dev/sda2(0) [cling_raid_rmeta_2] ewi-aor--- 4.00m /dev/sdc1(0) [root@host-076 ~]# lvcreate --alloc cling_by_tags --type raid6 -i 3 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Insufficient suitable allocatable extents for logical volume cling_raid: 153 more required [root@host-076 ~]# lvcreate --alloc cling_by_tags --type raid10 -i 2 -n cling_raid -L 600M raid_sanity Using default stripesize 64.00 KiB. Insufficient suitable allocatable extents for logical volume cling_raid: 304 more required The original report did not discuss the other raid modes and I left them out because it was not clear there was any customer demand and we have not yet developed sensible specifications of the desired layouts. Does anyone know of some layouts people are actually using, splitting raid5 or raid6 across 2 or 3 data centres? Marking this bug verified for types "mirror" and "raid1" volumes *only* and opened bug 1217605 for raid10 contiguous allocation. 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. https://rhn.redhat.com/errata/RHBA-2015-1411.html |