Red Hat Bugzilla – Bug 1250627
lvcreate --type raid1 -m 1 -l 90%vg -n cache0 vgcache.0 /dev/sda /dev/sdd # takes up all 100%
Last modified: 2018-04-03 11:24:59 EDT
Description of problem: is this normal? Does -l work? Only if I specify size with -L 200G I see free PEs in VG. Version-Release number of selected component (if applicable): lvm2-2.02.115-3.el7_1.1.x86_64 How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Yes, `-l` works: it is specifying the approximate size of the LV created not the total space consumed. In this case 2 90%vg RAID legs are created, and LVM correctly caps that at 100%.
Hmmm, seems it "works" and after all it IS a bug: > When expressed as a percentage, the number is treated as an > approximate upper limit for the total number of physical extents to be > allocated (including extents used by any mirrors, for example).
Not sure where this landed compared to various upstream changes and fixes to this particular code. If you think it's important, it's worth trying again and posting full -vvvv output to reveal what it is actually doing.
This seems to work for me... Is there still a problem here? [root@bp-01 ~]# pvs -S vgname=vg PV VG Fmt Attr PSize PFree /dev/sdb1 vg lvm2 a-- <836.69g <836.69g /dev/sdc1 vg lvm2 a-- <836.69g <836.69g [root@bp-01 ~]# vgs vg VG #PV #LV #SN Attr VSize VFree vg 2 0 0 wz--n- 1.63t 1.63t [root@bp-01 ~]# lvcreate -m 1 -l 90%VG -n lv vg Logical volume "lv" created. [root@bp-01 ~]# vgs VG #PV #LV #SN Attr VSize VFree rhel_bp-01 1 3 0 wz--n- <464.76g 4.00m vg 2 1 0 wz--n- 1.63t <167.34g [root@bp-01 ~]# lvs vg LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv vg rwi-a-r--- <753.02g 0.13 [root@bp-01 ~]# lvremove -ff vg Logical volume "lv" successfully removed [root@bp-01 ~]# lvcreate -m 1 -l 90%FREE -n lv vg Logical volume "lv" created. [root@bp-01 ~]# vgs VG #PV #LV #SN Attr VSize VFree rhel_bp-01 1 3 0 wz--n- <464.76g 4.00m vg 2 1 0 wz--n- 1.63t <167.34g [root@bp-01 ~]# lvs vg LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv vg rwi-a-r--- <753.02g 0.10