Server Pools – Clusterware 11g Release 2 – Part I
Introduction
11g Release 2 has introduced a new option to administer the cluster called “Police-based Management”, traditional physical method is still available.
This is an incredible new feature that needs to be researched, clearly marks the new direction that Oracle wants to give us, BTW, it’s a smart direction/possibility where the efforts will be concentrated in the business rules/needs and not in the basic/traditional cluster administration.
Policy-Based Management
- Enables dynamic capacity assignment when needed to provide server capacity in accordance with the priorities you set with policies
- Enables allocation of resources by importance, so that applications obtain the required minimum resources, whenever possible, and so that lower priority applications do not take resources from more important applications
- Ensures isolation where necessary, so that you can provide dedicated servers in a cluster for applications and databases
Server Pools
Server Pools enables you to dynamically assign capacity to meet your policies and priorities, as well as to allocate physical resources by importance. Your critical applications will always have a minimum of resources.
All servers that join the grid are automatically assigned to the “Free Pool” initially. This Free Pool is a server pool that is automatically created during the installation. From here, servers can be assigned to other server pools. Another pool, the Generic Pool is also automatically generated, and all servers will be part of this pool too, in order to ensure compatibility with prior releases. Any pre-11gR2 database will need to run in this generic server pool.
To finish, in my personal opinion it’s key to understand Server Pools, database administrator needs to know how the cluster will meet the client’s requirements using the clusterware available options correctly.
If you want to try clustwerare commands check this link: Server Pools Experiments in RAC 11g R2
Source
Oracle® Clusterware Administration and Deployment Guide
11g Release 2 (11.2)
Part Number E10717-11
