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Ashesh Parekh Principal Product Manager Oracle Application Server Oracle Corporation

Ashesh Parekh Principal Product Manager Oracle Application Server Oracle Corporation. Oracle Application Server 10 g High Availability. Agenda. Oracle Application Server High Availability Overall Availability Features Infrastructure Availability

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Ashesh Parekh Principal Product Manager Oracle Application Server Oracle Corporation

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  1. Ashesh ParekhPrincipal Product Manager Oracle Application Server Oracle Corporation

  2. Oracle Application Server 10g High Availability

  3. Agenda • Oracle Application Server High Availability • Overall Availability Features • Infrastructure Availability • Cold Failover Cluster and Active Failover Cluster • Identity Management Replication and RAC • Middle Tier Availability • J2EE Application High Availability • Portal, Forms, Reports and other Middle Tiers • Summary

  4. Agenda • Oracle Application Server High Availability • Overall Availability Features • Infrastructure Availability • Cold Failover Cluster and Active Failover Cluster • Identity Management Replication and RAC • Middle Tier Availability • J2EE Application High Availability • Portal, Forms, Reports and other Middle Tiers • Summary

  5. HA Architectural Overview Web Users Middle Tier Clusters Load Balancer / Web Cache Oracle Database Wireless &Mobile OHS with Load Balancing Infrastructure Cluster Client Oracle Application Server 10g RAC End-to-end High Availability

  6. Oracle Application Server HA System Failure Load balancers, Clusters, OPMN UnplannedDowntime Data Failure& Disaster Disaster Recovery, Backup & Recovery Human Error B&R, Configuration “undo” SystemMaintenance Rolling Upgrades PlannedDowntime Data Maintenance Shouldn’t be any (data in database)

  7. Key Messages • Key feature of Grid Computing • Workload and Resource Management • End-to-End High Availability • Self Healing • No single point of Failure • Clustering • Minimal planned or unplanned downtime • Rolling Upgrades • Disaster Recovery for MT as well as Infrastructure

  8. Core HA features of OracleAS • OracleAS Process Monitoring and Notification service (OPMN): • Enables “Self Healing” • Process Monitoring (Death detection and Re-start) • Distributed Configuration Manager (DCM): • File-based repository or database-based repository • Consistent configuration management –prevents human errors

  9. Backup and Recovery • Backup and Recovery Tool • For Middle Tiers as well as Infrastructure • Incremental backup and recovery • Point-in-time recovery • DCM Archival and Recovery • Revert to a previous configuration • Low overhead, quick “undo” • Works with DCM-managed components • Ideal for quick recovery from human error

  10. Clients Load Balancer Load Balancer DR Sync MT 1 MT 2 MT 2* MT 1* DR Sync Infra DR Sync Infra* Primary Site Standby Site Disaster Recovery • Site-to-site DR • Active/Standby DR using: • Virtual hostnames • Backup and recovery to synchronize primary & standby sites • Data Guard for Infrastructure database

  11. Disaster Recovery Clients • Site-to-site DR • Active/Standby DR using: • Virtual hostnames • Backup and recovery to synchronize primary & standby sites • Data Guard for Infrastructure database Load Balancer Load Balancer DR Sync MT 1 MT 2 MT 2 MT 1 DR Sync Infra DR Sync Infra Primary Site Standby Site

  12. Rolling Upgrades 4 1 2 3 Clients Clients Clients Clients X X MT902 MT902 MT902 MT902 MT904 MT902 MT904 MT902 Infra902 Infra902 Infra902 Infra902

  13. Rolling Upgrades – contd. 7 5 6 .) Clients Clients Clients X X MT904 MT904 MT904 MT904 MT904 MT904 X Infra902 Infra902 Infra904

  14. Agenda • Oracle Application Server High Availability • Overall Availability Features • Infrastructure Availability • Cold Failover Cluster and Active Failover Cluster • Identity Management Replication and RAC • Middle Tier Availability • J2EE Application High Availability • Portal, Forms, Reports and other Middle Tiers • Summary

  15. Infrastructure High Availability • Critical Services • Identity Management Services – for SSO/OID • Metadata Repository Services – for Portal, Wireless, Discoverer, etc. • Management Services – for Enterprise Manager • HA Options • Cold Failover Cluster (CFC) • Active Failover Cluster (AFC) • Identity Management (IM) Replication • Install Metadata Repository in existing RAC DB

  16. Cold Failover Cluster • Active/Passive setup • Single Install • On shared disk • Using virtual hostname & IP • Cluster vendors supported: • Sun, HP, Red Hat, IBM, Veritas, Fujitsu-Siemens, Windows, etc. Clients MT MT • OID • SSO • DAS • Infra DBinstance ActiveInfra InactiveInfra V. Host Hardware cluster Sharedstorage $ORACLE_HOME

  17. Cold Failover Cluster • Active/Passive setup • Single Install • On shared disk • Using virtual hostname & IP • Cluster vendors supported: • Sun, HP, Red Hat, IBM, Veritas, Fujitsu-Siemens, Windows, etc. Clients MT MT • OID • SSO • DAS • Infra DBinstance InactiveInfra ActiveInfra V. Host Hardware cluster Sharedstorage $ORACLE_HOME

  18. Middle Tiers on Cold Failover Cluster • No Failover of Middle Tiers • Use LBR to route requests • Middle Tiers use physical hostname • On local disk • Infrastructure uses virtual hostname • On Shared disk Clients Load Balancer MT 1 Node A MT 2 Node B ActiveInfra InactiveInfra Virtual Hostname Hardware cluster Localstorage B Localstorage A Sharedstorage $OH_A $OH_B $OH_INFRA

  19. Middle Tiers on Cold Failover Cluster • No Failover of Middle Tiers • Use LBR to route requests • Middle Tiers use physical hostname • On local disk • Infrastructure uses virtual hostname • On Shared disk Clients Load Balancer Node A MT 1 MT 2 Node B InactiveInfra ActiveInfra Virtual Hostname Hardware cluster Localstorage B Localstorage A Sharedstorage $OH_A $OH_B $OH_INFRA

  20. Active Failover Cluster Clients • Active/Active setup • “High 9s” uptime • Single Install • DB (RAC) on shared disk • Rest-of-infra on local disks • Requires load balancer • Limited Release in 9.0.4 MT MT Load Balancer OID 1 SSO 1 DAS 1 DB instance 1 OID 2 SSO 2 DAS 2 DB instance 2 ActiveInfraNode 1 ActiveInfraNode 2 Hardware cluster Localstorage Localstorage Sharedstorage $O_H1 $O_H2 Infra DB files

  21. Active Failover Cluster Clients • Active/Active setup • “High 9s” uptime • Single Install • DB (RAC) on shared disk • Rest-of-infra on local disks • Requires load balancer • Limited Release in 9.0.4 MT MT Load Balancer OID 1 SSO 1 DAS 1 DB instance 1 OID 2 SSO 2 DAS 2 DB instance 2 ActiveInfraNode 1 ActiveInfraNode 2 Hardware cluster Localstorage Localstorage Sharedstorage $O_H1 $O_H2 Infra DB files

  22. IM Service Replication MT 1 W A N MT 2 • Multiple IM Middle Tiers • Multiple OID • Multiple IM DBs (kept synchronized using Replication) • Ideal for geographically dispersed sites Local DNS Local DNS IdentityMgmtMT 1 IdentityMgmtMT 2 SSO 1 SSO 2 OID 1 OID 2 DataReplication DB1 DB2 San Francisco London

  23. Metadata Repository in existing RAC DB • Install MR in existing RAC database • No database in the Infrastructure installation • Provides HA for MR, but not for the rest of Infrastructure (IM) MT OHS OC4J SSO IdentityMgmt Infrastructure DB2 InfrastructureMetadata Repository DB1 Pre-existing RAC DB

  24. Agenda • Oracle Application Server High Availability • Overall Availability Features • Infrastructure Availability • Cold Failover Cluster and Active Failover Cluster • Identity Management Replication and RAC • Middle Tier Availability • J2EE Application High Availability • Portal, Forms, Reports and other Middle Tiers • Summary

  25. Middle Tier High Availability • Web Cache clusters provide redundancy and fault tolerance • OHS/mod_oc4j load balancing and smart routing • weighted, metrics-based, round robin, random • local affinity • File based repository for OC4J clusters • EJB Client Proxy: • Auto-rerouting of requests from EJB Clients • Hot Deployment of J2EE applications

  26. Transparent Application Failover (TAF) • TAF of JDBC connections to RAC database • Supported with JDBC Thick driver (OCI driver) • Define oracle.jdbc.OracleOCIFailover Interface for stateful applications (to handle state restore) • Configuration modes: • Basic Method: re-connect upon failure • Pre-connect Method: maintain backup (shadow) connection to another instance for faster TAF • For non RAC database auto-retry (with timeout)

  27. Load Balancing Scale middle-tier ‘linearly’ Session Replication Configuration Cloning Deploy across clusters Oracle Application Server Clusters HTTP Request HTTP Request Load Balancer LB-1 LB-1 Web Cache WC-1 WC-2 WC-3 OHS Instances OHS OHS OHS OC4J Instances Beta Prod Beta Prod Beta Prod OC4J Islands IB1 IP3 IB1 IP3 IP4 IP1 IP2 OC4J Processes 2 3 1 1 2 3 4 2 3 Cluster, Instances, and Islands

  28. Middle Tier Clusters Load Balancer / Web Cache OHS with Load Balancing Infrastructure Cluster Oracle Application Server 10g Portal, Forms, Reports, and other Middle Tiers • Configuration: • Load Balancer • Web Cache Clusters • Multiple Middle Tiers • Infrastructure CFC or Active Failover Cluster • Backend RAC DB

  29. Oracle Application Server Future Roadmap • Active Failover Cluster enhancements • Improve Cloning capabilities • Disaster Recovery enhancements • Maximum Availability Architecture (MAA)

  30. Cohesive HA: MAA Application Server Application Server WAN Traffic Manager Dedicated Network Data Guard RAC RAC Primary Site Secondary Site

  31. Resources • Oracle Technology Network (OTN): • http://otn.oracle.com/products/ias/hi_av/content.html • http://otn.oracle.com/deploy/availability/content.html • http://otn.oracle.com/deploy/availability/htdocs/maa.htm • Oracle Application Server 10g (9.0.4) Documentation: • High Availability Guide, Install Guide, Admin Guide • Oracle University Curriculum: • Admin courses, OUOnline courses

  32. Summary • End-to-End High Availability • No Single Point of Failure • Self Healing • Quick Recovery • Ease of Configuration • Minimize human errors • Rolling Upgrades • Minimal planned or unplanned downtime

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