[Linux-cluster] Distributed Storage in Cluster Suite

[Joseph L. Casale]

>Or you can go active-active with GFS. :)

Ok, based on Lon Hohberger's and your suggestion, I'll mock this up.
I presume the choice on Pri/Pri w/ GFS2 overcomes management issues
imposed on the Pri/Sec role case's that would otherwise be involved.

>> Looking through drbd.sh I see case's for promote/demote, I added this (the wrapper actually)
>> as a resource "script" with a child "fs" in a mock cluster as the underlying device
>> was primary on that node, it just started:) How does rhcs know when adding a "script"
>> to pass the required cases? How do I configure this?
>
>I use it in active-active mode with GFS. In that case I just use the 
>fencing agent in DRBD's "stonith" configuration so that when 
>disconnection occurs, the failed node gets fenced.

I see the ifmib fencing agent in git, am I ok to utilize this as my single fencing
agent in this drbd pri/pri setup with gfs2? I suspect this would be effective
in my environment given the equipment I have.

Does this allow me to neglect the use of stonith and the config in the drbd.conf
file and let rhcs handle fencing solely on its own? Or is this additional layer
of fencing something needed to be done for drbd's sake, in that case I guess I
would implement both?

Thanks again everyone!
jlc