Hacmp Consept

HACMP - High Availiability Clustered Mutiple Processing

The masking or elimination of planned or unplanned downtime
The elimination of single points of failure (SPOFs)
-Computers
-Disks
-Networks
-etc
Fault resilience, but not fault tolerance
A fault tolerant environment has no service interruption
A high availability environment has minimal service interruption

HACMP - Resource Groups
Resource Groups are a set of cluster resources handled as one unit by HACMP, configured by the HACMP administrator.
Attributes of a Resource Group
-startup, fallover and fallback policies
-settling time and the distribution policy
-delayed fallback timer that affects fallback.
-Resource groups can be concurrent and non-concurrent.

Resource Groups are used to coordinate the failover of:
-Network Addresses
-Disks
-NFS mounts
-Applications