[linux-lvm] Running LVM on shared lun's

[David Chan]

Don't think LVM is cluster aware.  Doing so can potentially cause loss
of LV's/data due to metadata corruption on the LVM level.  
-----Original Message-----
From: linux-lvm-bounces at redhat.com [mailto:linux-lvm-bounces at redhat.com]
On Behalf Of Joshua Aune
Sent: Monday, August 07, 2006 3:00 PM
To: LVM general discussion and development
Subject: [linux-lvm] Running LVM on shared lun's

I have two systems that are connected to a SAN.  The SAN is exporting
the same 4 luns to each system (/dev/sd[b,c,d,e]).  Under normal
operation system1 will combine sdb with sdc into a vg and system2 will
combine sdd with sde into a vg with both vgs consisting of one large lv
and one small lv.  After the system is configured there will be no
modifications made to the LVM configuration.  LVM is configured on one
node and then copied over to the second node.

The million dollar question is, can system1 and system2 simultaneously
have both of the VGs active without hosing any data?  

I am not trying to have the same filesystem mounted simultaneously, just
have the LVs available simultaneously for failover needs

I know that this sort of config can be done with the GFS pool volume
manger but I have been told that many other VMs don't support this
behavior....

Thanks,
Josh

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