Re: how many number of nodes

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There are two general configurations: N + I and failover pairs.

For N + I, you would have N active nodes and I inactive. Each of the active
nodes would be paired with one or more of the inactive nodes. If you had
multiple active node failures then the inactive node(s) would have to have
enough processing power to host each of the failed configurations.

For the failover pairs, say you had, in your case, servers A, B, C, and D.
Then you would install each of the instances to a pair: Instance 1 to A and
B, Instance 2 to B and C, Instance 3 to C and D, and Instance 4 to D and A.
All would be active, each capable of running at least 2 instances for
maintenance or due to failure.

I prefer the N + I model because it is easier to manage, but the other works
well too.

Sincerely,


Anthony Thomas


--

"Bharathi" <NoSpam_BB@xxxxxxxxxxx> wrote in message
news:OWOGrVtXHHA.3952@xxxxxxxxxxxxxxxxxxxxxxx
Hi,
I am a newbie to Clustering. I dont know how to decide how many
number
of nodes I need to install. For example, if I have 4 SQL database servers
and all 4 servers should be highly availabe and automatically failover. In
this case how can I configure clustering?





.

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