Peterson, Chris wrote:
> Well, I am running SQL 2005 Std (which supports clustering), but I would
> need another SQL 2005 Std license to do a true fault tolerant cluster.

How can you create a fault tolerant cluster with only 2 servers? If the 2 
servers get out of sync due to a network issue, which one is authorative? What 
happens if they are both up and running, but they just can not see eachother 
anymore? If they continue to process transactions there is no way to guarantee 
that those transactions do not conflict. If they stop processing transactions 
your setup has only cost you reliability. And if a predefined master server 
continues to process transactions, you have gained nothing. Can a cluster 
reliably differentiate between a server down situation and an out of sync 
situation?

The way I look at clustering of transactional processes, you need more then 
half of the servers running to have a quorum. That means that you need at least 
three servers so that there still is a quorum when the cluster is degraded.

Jochem

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