Oracle Application Server 10g (9.0.4) has significantly enhanced and broadened High Availability solutions across the stack.

Oracle Application Server 10g High Availability includes the following features and enhancements for end-to-end high availability:

• Facilities for Application High Availability:
• Transparent container-managed session state replication for J2EE applications
• Java Object Cache available to application developer if more control of replication required
• TAF: Transparent Application Failover for database connections
• Middle Tier High Availability:
• Death detection and restart of failed processes
• Support for database-managed and manually configured Oracle Application Server clusters
• Resource provisioning features for Grid Computing
• Smart load balancing algorithms for optimal resource utilization in a Grid, including:
• Round robin
• Random routing
• Weight-based and metric-based routing
• Local affinity
• Infrastructure High Availability:
• Death Detection and restart of failed processes
• Cluster-aware installer
• Cold Failover Clusters:
  • Support for all major cluster vendors
  • Configuration on shared disk
  • Support for virtual IP/hostname on active cluster node
• Active Failover Clusters:
  • Active/Active mode support
  • Infrastructure software installed on each node accessing shared database
  • Configuration replicated on each node
• Disaster Recovery:
  • Disaster Recovery support for site-to-site failover
  • Available for both middle tiers and for Infrastructure
  • Uses Oracle Data Guard for Infrastructure database Disaster Recovery
• Rolling Upgrade:
  • Support for middle tier and Infrastructure rolling upgrade from 9.0.2 to 9.0.4
  • Minimized planned downtime