HACMP and data replication each serve different needs in the high availability and disaster recovery arenas. Combining the two delivers the best of both worlds.
Written by Rich Krause
Many AIX shops protect the availability of their applications by using IBM's High Availability Cluster Multi-Processing (HACMP) to closely link multiple servers connected to shared storage. HACMP monitors the health of the cluster and can automatically recover applications and system resources on a secondary server if the primary server is unavailable. Because the cluster typically operates in a shared-disk environment, as depicted in Figure 1, failover times are very short in this scenario because the failover occurs entirely within the local cluster.