Database - RAC/Scalability (MOSC)

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2 Node RAC vs 3 Node RAC

edited Nov 1, 2013 7:03AM in Database - RAC/Scalability (MOSC) 5 commentsAnswered
We are building a new system and would like to use oracle 11gr2 RAC for our databases.We have decided to go with 2node RAC or 3node RAC.

Our system will have around 20-50 concurrent users only, the main consideration here is availability more than performance.
We need to our databases to be up 24/7 and performance is ket but can be sacrificed a bit for availability.

Is cost the only factor that decides whether to go for 3node or not ?
I understand we will be having high availability with 3node RAC, even if the other 2 goes down.

Is it better to go for a 3node RAC on 3 small servers (memory,cpu etc) or 2 node rac on 2 large servers ?

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