cluster VG listing on both nodes

[Trng]

Hi Gurus,

i ahve a two node clsuter configured.when i am doing vgdisplay -v /dev/vg01 ,it shows vg01 is in exclusive mode in primary node and executing vgdisplay /dev/vg01 on adoptive node showing "vg01 with read write permission.how this vg is showing and active on both the nodes ?

rgds
trng

[Torsten.]

Is it really the same VG?

If yes, you have a problem.
If not, you have a problem too.

This should not happen.

Since I don't know anything about your config, I can't say more ...

[Rita C Workman]

Is it possible that maybe there are two vg01 volume groups running with different minor numbers ?


Just a quick thought,
Rita

[Kenan Erdey]

Hi,

check with strings /etc/lvmtab. and they are the same vg. also you can check them with vgid by exporting to a map file in both nodes and compare.

[Trng]

we are not sure why it is showing,anyway we went ahead and deactivated the vg on adoptive node ..

[Torsten.]

If I would be the admin, I would investigate this urgently ...

[Duncan Edmonstone]

Agree eith Torsten, if you worked for me and said "not sure why it happened, but we fixed it" that would not be good enough. If Serviceguard is used correctly there should be NO WAY that a vg could be active in exclusive read/wite on one node and active in mormal read/write mode on the other.

The only 2 ways this could happen are:

i) There's a bug in the software - in which case it needs finding, isolating and reporting to HP for a fix (or a patch to fix it is applied)

ii) Someone did something stupid - in which case you need to figure out who that was and what they did and educate them on correct practices with Serviceguard clusters.

Either way, the correct answer isn't to ignore it and do nothing - do you even know if any of your data on the filesystems in this VG is corrupt? That's entirely possible when VGs are active on 2 nodes at once...

HTH

Duncan