[DRBD-user] Stack resource. Dual Primary Mode Possible?

[David Whiteman]

Hello,

I am currently working on a highly available NFS service. I would like 
to set this up with 2 servers, running RAID 6 and drbd running on top of 
the raid device. I can then provide a virtual IP address for the clients 
to mount the NFS directories.

This will later be expanded upon where we would need to write to the NFS 
storage from another location. Is it possible to have 2 2 node clusters, 
replicated by a stacked resource? Is the stacked resource able to work 
in dual primary mode?

Here is what I want to setup.

[       Primary        ]<-------------->[       Primary        ]
[Primary]--->[Secondary]                [Primary]--->[Secondary]

Is this possible?

Thanks in Advance