Understand the server pool concepts in Oracle Real Application Clusters (Oracle RAC) environments.

• Policy-Managed Clusters and Capacity Management
  Oracle Clusterware uses policy-based management of servers and resources used by Oracle databases or applications.
• Oracle RAC Database and Server Pools
  Oracle RAC databases support two types of server pool management styles and deployment models.
• About Creating Server Pools for Oracle RAC Databases
  You can create a server pool with DBCA while creating an Oracle RAC database, but Oracle recommends that you create server pools before you deploy database software and databases.
• Oracle RAC One Node and Server Pools
  Review the following information about Oracle RAC One Node and server pools.