Why did Red Hat remove clustering from Red Hat Enterprise Linux AS?

Red Hat Enterprise Linux AS v. 2.1 included the required technologies and support for two node failover clustering. With the release of Red Hat Enterprise Linux v. 3, we expanded the technical capabilities of the Red Hat Cluster Manager (up to eight nodes) and increased the deployment options. Red Hat Cluster Suite is now available on Enterprise Linux ES in addition to AS.

With these improvements, customers can now deploy clustering in even lower cost configurations choosing Red Hat Enterprise Linux ES as the operating platform for each cluster node.

For more information about Red Hat Cluster Suite, visit: http://www.redhat.com/software/rha/cluster/