Migrate cluster lock device

[ArvindMenon]

Hi,

I am planning to migrate cluster lock VG from old storage box to new one. What would be the best procedure to do it?

Presentely i am planning following procedure.

Create a new cluster lock volume group.

Frist node
# pvcreate /dev/rdsk/c_t_d_
# mkdir /dev/vglocknew
# mknod /dev/vglocknew/group c 64 0x0100000
# vgcreate /dev/vglocknew /dev/dsk/c_t_d_"
# vgexport -pvs -m map.vglocknew /dev/vglocknew
# rcp map.vglocknew SECONDNODE:/etc/lvmconf

Second Node
# mkdir /dev/vglocknew
# mknod /dev/vglocknew/group c 64 0x0100000
# cd /etc/lvmconf
# vgimport -vs -m map.vglocknew /dev/vglocknew
# vgchange -a y vglocknew
# vgchnage -a n vglocknew

# cmgetconf cluster.ascii
# cp cluster.ascii cluster.ascii.backup

Edit following parameter in the ascii file.

FIRST_CLUSTER_LOCK_VG /dev/vglocknew
FIRST_CLUSTER_LOCK_PV /dev/dsk/c_t_d_
FIRST_CLUSTER_LOCK_PV /dev/dsk/c_t_d_
VOLUME_GROUP /dev/vglocknew


# cmcheckconf -C /etc/cmcluster/cluster.ascii"

Bring all package down
# cmhaltpkg

Bring cluster down.
# cmhaltcl -v

Activate the lock VG.
# vgchange -a y vglocknew

Apply new configuration file.
# cmapplyconf -f -C /etc/cmcluster/cluster.ascii"
# vgchange -a n vglocknew

Start the cluster.
# cmruncl -v
# vgchnage -c y /dev/vglocknew"
#cmrunpkg

Reagards
Arvind

[Stephen Doud]

Looks good to me!
(Note the typo "vgchnage") near the bottom.

[melvyn burnard]

looks well planned and ok to me

[Carsten Krege]

The procedure you are using is correct and supported by HP (besides of multiple typos "vgchnage"). The only thing I can add is that you might want to add the "-K" option for cmapplyconf if you want to minimize the downtime (available with SG A.11.15 and later). THis limits the disk checking of cmapplyconf to the cluster lock VG. Otherwise if you deal with a large disk farm, you might have to wait for a long time.

There is no way that you can change the cluster lock disk while keeping the cluster online.

Carsten

[ArvindMenon]

Thanks All for there effort.

[ArvindMenon]

Thanks