I have been using rsync to do data migration, recently I need to do data migration again.
Since this time the data resides in Veritas volumes, I want to try the Veritas way.
My setup in the old server is like this:
# vxprint -g ftpdg
TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0
dg ftpdg ftpdg - - - - - -
dm ftpdg01 tagmastore-usp0_0 - 461350656 - - - -
dm ftpdg02 tagmastore-usp0_1 - 31439616 - - - -
v volb gen ENABLED 461314816 - ACTIVE - -
pl volb-01 volb ENABLED 461314816 - ACTIVE - -
sd ftpdg01-01 volb-01 ENABLED 461314816 0 - - -
v vols gen ENABLED 31438848 - ACTIVE - -
pl vols-01 vols ENABLED 31438848 - ACTIVE - -
sd ftpdg02-01 vols-01 ENABLED 31438848 0 - - -
I allocated two LUNs from storage, they are identified as tagmastore-usp0_2 and tagmastore-usp0_3.
To enable the new disks
# vxdctl enable
My privlen for old disks was 2048, so set the same value for new disks
# vxdisksetup -i tagmastore-usp0_2 privlen=2048
# vxdisksetup -i tagmastore-usp0_3 privlen=2048
Add the new disks to disk group:
# vxdg -g ftpdg adddisk ftpdg03=tagmastore-usp0_2
# vxdg -g ftpdg adddisk ftpdg04=tagmastore-usp0_3
Create sub disk and plex
# vxmake -g ftpdg sd ftpdg03-01 ftpdg03,0,461314816
# vxmake -g ftpdg plex volb-02
# vxmake -g ftpdg sd ftpdg04-01 ftpdg04,0,31438848
# vxmake -g ftpdg plex vols-02
Attach the plex to volumes
# vxplex -g ftpdg att volb volb-02
# vxplex -g ftpdg att vols vols-02
After attaching the plex, both old and new disks should have identical data, we can detach the new disks and add it to our new server.
Detach the new plex
# vxplex -g ftpdg det volb-02
# vxplex -g ftpdg det vols-02
Disassociate the new plex
# vxplex -g ftpdg dis volb-02
# vxplex -g ftpdg dis vols-02
Create new volume using the detached plex
# vxmake -g ftpdg vol newb plex=volb-02
# vxmake -g ftpdg vol news plex=vols-02
Split the diskgroup
# vxdg split ftpdg ftpdg2 newb news
At this step, we will have a diskgroup ftpdg2, inside it there are two volumes: newb and news.
We are planning to use the same volume names on new server, so rename the volumes in ftpdg2
# vxedit -g ftpdg2 rename newb volb
# vxedit -g ftpdg2 rename news vols
We can deport ftpdg2 from our old server:
# vxdg deport ftpdg2
On new server we can import ftpdg2 as ftpdg
# vxdg import -n ftpdg ftpdg2
We also need to start the volumes
# vxvol -g ftpdg start volb
# vxvol -g ftpdg start vols
The device path for the volumes are:
/dev/vx/dsk/ftpdg/volb
/dev/vx/dsk/ftpdg/vols
we can mount the volumes and start using it!
