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Hi, I’m testing clustered mirror with RHEL 5.3 and I’m
finding weird behavior. I’ve installed and enabled cmirror and created a
couple of mirrored logical volumes (after some fight with clvmd errors…): [root@rmamseslab07 usr]# lvs
-a -o +devices lvol8
vg00 -wi-ao 4.00G
/dev/cciss/c0d0p2(736) lv_mirror
vgcluster mwi-ao 1.00G lv_mirror_mlog 100.00 lv_mirror_mimage_0(0),lv_mirror_mimage_1(0) [lv_mirror_mimage_0]
vgcluster iwi-ao 1.00G
/dev/mapper/mpath0p2(0) [lv_mirror_mimage_1]
vgcluster iwi-ao 1.00G /dev/mapper/mpqdiskp5(512)
[lv_mirror_mlog]
vgcluster lwi-ao 4.00M
/dev/mapper/mpath0p1(0) lv_test1
vgcluster -wi-ao 1.00G /dev/mapper/mpqdiskp5(256)
lv_test4
vgcluster mwi-ao 1.00G lv_test4_mlog 100.00
lv_test4_mimage_0(0),lv_test4_mimage_1(0) [lv_test4_mimage_0] vgcluster iwi-ao
1.00G
/dev/mapper/mpqdiskp5(0) [lv_test4_mimage_1] vgcluster iwi-ao
1.00G
/dev/mapper/mpath0p2(256) [lv_test4_mlog] vgcluster lwi-ao
4.00M
/dev/mapper/mpath0p1(1) [root@rmamseslab07 usr]# I’m simulating the failure of a disk by disabling one
of the disks having a mirror leg from the storage array or from dm-multipath
and the result I get is not the desired one, simply, any lvm command hangs and
filesystem appears as hang as well. After enabling the disk again, everything
is recovered. Is anyone using successfully lvm mirror in a RH cluster with
RHEL 5.3 with dm-multipath devices? Is there any alternative for software mirroring to lvm
mirror for RHCS. i.e. VxVM or something like that? Best regards, Alfredo Moralejo F. Hoffmann-La Roche Ltd. Global Informatics Group Infrastructure Phone: +34 91 305 97 87 Confidentiality Note:
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