Bug 243773

Summary: up converted cmirrors take 90+ seconds to mount
Product: [Retired] Red Hat Cluster Suite Reporter: Corey Marthaler <cmarthal>
Component: cmirrorAssignee: Jonathan Earl Brassow <jbrassow>
Status: CLOSED DUPLICATE QA Contact: Cluster QE <mspqa-list>
Severity: low Docs Contact:
Priority: low    
Version: 4CC: agk, dwysocha, mbroz, prockai
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-08-22 17:28:23 UTC Type: ---
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: 242074    
Bug Blocks:    

Description Corey Marthaler 2007-06-11 20:11:43 UTC 
Description of problem:
This may not be a bug, but figured I'd document this incase it can be sped up a
bit or incase a customer runs into this.


# Fully synced mirror
[root@link-08 ~]# lvs
  LV       VG         Attr   LSize  Origin Snap%  Move Log          Copy%
  LogVol00 VolGroup00 -wi-ao 72.44G
  LogVol01 VolGroup00 -wi-ao  1.94G
  mirror1  corey1     mwi-a-  1.00G                    mirror1_mlog 100.00
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1
real    0m2.596s
user    0m0.000s
sys     0m0.020s


# Linear
[root@link-08 ~]# umount /mnt/mirror1
[root@link-08 ~]# lvconvert -m 0 corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# lvs
  LV       VG         Attr   LSize  Origin Snap%  Move Log Copy%
  LogVol00 VolGroup00 -wi-ao 72.44G
  LogVol01 VolGroup00 -wi-ao  1.94G
  mirror1  corey1     -wi-a-  1.00G
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    0m2.082s
user    0m0.000s
sys     0m0.015s


# One legged mirror
[root@link-08 ~]# umount /mnt/mirror1
[root@link-08 ~]# lvconvert -m 1 corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    1m30.281s
user    0m0.000s
sys     0m0.019s
[root@link-08 ~]# umount /mnt/mirror1
[root@link-08 ~]# lvconvert -m 0 corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# lvs -a -o +devices
  LV       VG         Attr   LSize  Origin Snap%  Move Log Copy%  Devices
  LogVol00 VolGroup00 -wi-ao 72.44G                               /dev/hda2(0)
  LogVol01 VolGroup00 -wi-ao  1.94G                               /dev/hda2(2318)
  mirror1  corey1     -wi-a-  1.00G                               /dev/sda1(0)



# One legged mirror (core log)
[root@link-08 ~]# lvconvert -m 1 --corelog corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    1m37.843s
user    0m0.001s
sys     0m0.024s
[root@link-08 ~]# umount /mnt/mirror1
[root@link-08 ~]# lvconvert -m 0 corey1/mirror1
  Logical volume mirror1 converted.


# Two legged mirror (core log)
[root@link-08 ~]# lvconvert -m 2 --corelog corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    1m37.783s
user    0m0.000s
sys     0m0.017s



Version-Release number of selected component (if applicable):
cmirror-kernel-2.6.9-32.0
lvm2-cluster-2.02.21-7.el4
Comment 1 Corey Marthaler 2007-06-11 20:22:37 UTC 
This issue is not present on single node mirrors...

[root@link-08 ~]# lvconvert -m 1 --corelog corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    0m2.436s
user    0m0.001s
sys     0m0.020s
[root@link-08 ~]# umount /mnt/mirror1
[root@link-08 ~]# lvconvert -m 0 corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# lvconvert -m 2 --corelog corey1/mirror1
  Logical volume mirror1 converted.
[root@link-08 ~]# time mount -t gfs /dev/corey1/mirror1 /mnt/mirror1

real    0m2.510s
user    0m0.000s
sys     0m0.018s
Comment 2 Corey Marthaler 2007-06-20 16:40:49 UTC 
This issue appears fixed in the lastest kernel mods that Jon gave me
(2.6.9-55.8.ELsmp).
Comment 3 Jonathan Earl Brassow 2007-06-22 14:43:10 UTC 
sorry.  Modified -> post... waiting for all patches to settle into the rhkernel.
Comment 4 Jonathan Earl Brassow 2007-08-22 17:25:27 UTC 
Should be ready in 4.6.

post -> modified.
Comment 5 Jonathan Earl Brassow 2007-08-22 17:28:23 UTC 
this bug is really a dup of 238629.


*** This bug has been marked as a duplicate of 238629 ***