[Linux-cluster] Starter Cluster / GFS
gordan at bobich.net
Thu Nov 11 08:59:30 UTC 2010
Nicolas Ross wrote:
>>> 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 ?
If two nodes lose contact to each other, one will fence each other and
shut it down.
If you don't need concurrent access, then why do you need a cluster file
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