Server pools logically apportion a cluster into groups of servers offering database or application services. Server pool properties control the scalability and availability of those databases and applications. You can configure each server pool with a minimum and maximum size, which determines scalability. Oracle Clusterware manages availability between server pools, and you can further regulate availability by configuring the importance value of individual server pools.
Servers are not assigned to server pools by name but by number. Therefore, you must configure any server to run any database. If you cannot configure servers due to, for example, heterogeneous servers or storage connectivity, then you can restrict servers by using server category definitions to determine server pool membership eligibility.
See Also:
Oracle Clusterware Administration and Deployment Guide for more information about creating and managing server pools