Kris Buytaert wrote:
We're trying to setup a dual-primary DRBD environment, with a shared disk with either OCFS2 or GFS. The environment is a Centos 5.3 with DRBD82 (but also tried with DRBD83 from testing) .
Both OCFS2 and GFS are meant to be used on SANs with shared storage(same LUNs being accessed by multiple servers), I just re-confirmed that DRBD is not a shared storage mechanism but just a simple block mirroring technology between a couple of nodes(as I originally thought).
I think you are mixing incompatible technologies. Even if you can get it working, just seems like a really bad idea.
Perhaps what you could do is setup an iSCSI initiator on your DRBD cluster, export a LUN to another cluster running OCFS2 or GFS(last I checked GFS required at least 3 nodes less than that and the cluster goes to read-only mode, I didn't see any minimum requirements for OCFS2).
Though the whole concept of DRBD just screams to me crap performance compared to a real shared storage system, wouldn't touch it with a 50 foot pole myself.
nate