[Linux-cluster] Starter Cluster / GFS

Nicolas Ross rossnick-lists at cybercat.ca
Wed Nov 10 16:29:51 UTC 2010

>> With a quorum disk, you can in fact have one node left and still have
>> quorum. This is because the quorum drive should have (node-1) votes,
>> thus always giving the last node 50%+1 even with all other nodes being 
>> dead.
> I've never tried testing that use-case extensively, but I suspect that it 
> is only safe to do with SAN-side fencing. Otherwise two nodes could lose 
> contact with each other and still both have access to the SAN and thus 
> both be individually quorate.

I our case, a particular node will run a particular service from a 
particular directory in the disk. So, even if 2 nodes looses contacts to 
each other, they should not end up writing or reading from the same files. 
Am I wrong ? 

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