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DescriptionCorey Marthaler
2016-09-14 21:39:05 UTC
Description of problem:
This is a follow up to the remaining issues in bug 1158172.
Scenario 1 in comment #26 of bug 1158172
### Scenario 1: No tags in lvm.conf, No alloc flags used in convert
[root@host-117 ~]# lvconvert -m1 --type mirror mirror_sanity/span
Logical volume mirror_sanity/span being converted.
mirror_sanity/span: Converted: 1.00%
mirror_sanity/span: Converted: 100.00%
[root@host-117 ~]# lvs -a -o +devices
LV VG Attr LSize Log Cpy%Sync Devices
span mirror_sanity mwi-a-m--- 400.00m [span_mlog] 100.00 span_mimage_0(0),span_mimage_1(0)
[span_mimage_0] mirror_sanity iwi-aom--- 400.00m /dev/sdf1(100)
[span_mimage_0] mirror_sanity iwi-aom--- 400.00m /dev/sdd2(100)
[span_mimage_1] mirror_sanity iwi-aom--- 400.00m /dev/sdd2(149)
[span_mimage_1] mirror_sanity iwi-aom--- 400.00m /dev/sdf1(151)
[span_mlog] mirror_sanity lwi-aom--- 4.00m /dev/sda1(0)
# This appears wrong as it's not redundant
Other questions remaining for tagged/cling scenarios in comment #26 of bug 1158172:
- should tagged PVs take precedence over untagged PVs when choosing, even if smaller?
- should normal allocation take account of PVs used by other segments when selecting parallel space?
so a new mirror leg should avoid all PVs used by all segments of the LV already thereby avoiding A-B / B-A layouts
Version-Release number of selected component (if applicable):
3.10.0-501.el7.x86_64
lvm2-2.02.165-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
lvm2-libs-2.02.165-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
lvm2-cluster-2.02.165-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
device-mapper-1.02.134-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
device-mapper-libs-1.02.134-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
device-mapper-event-1.02.134-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
device-mapper-event-libs-1.02.134-2.el7 BUILT: Wed Sep 14 09:01:43 CDT 2016
device-mapper-persistent-data-0.6.3-1.el7 BUILT: Fri Jul 22 05:29:13 CDT 2016