Oracle Java Containers are aware of nodes that
share state information, so they can provide high availability for stateful load balancing
by redirecting requests to a failed node to another node that shared application
state with the failed node. In Oracle Application Server 10g, youcan create policies
that can reallocate a node from one cluster to another without having to restart the
cluster.
Oracle Application Server includes a high availability framework, which monitors
instances for their health, informs the system of problems, and automatically
attempts to restart failed instances. Each node in a cluster contains its own configuration
information, so if the node containing the repository that describes the cluster
becomes unavailable, the node can continue to run. Oracle HTTP Server (OHS) can
rebuild the repository on a designated backup node, eliminating this potential single
source of failure.
Oracle Application Server 10g Release 3 added a Flashback capability giving administrators
the ability to revert to earlier versions of configuration and system files, and
Application Server Guard used to verify and synchronize standby servers.
Pages:
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742