Maximizing Availability with Oracle Application Server 10g - OpenMPE

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Load Balancing: “Crash” Prevention •“The best way not to fall” is to adapt routing to node’s state: let node recover from peaks and route to a more relaxed node •Most crashes come from overloading…overloading is 90% application’s responsibility •Load Balancing: • From webcache to http servers • From http servers to j2ee containers • Intra j2ee containers load balancing • From j2ee containers to databases System Failure 28
“Crash” Prevention Tiers Involved Webcache to Http servers Critical? (0-5) 3 LB mechanisms Round-robin, weighed round robin Http servers to j2ee containers Intra j2ee containers 5 3 Random, Round Robin, Random with Local Affinity, Round Robin with Local Affinity, Random using Routing Weight, Round Robin using Routing Weight, Metrics Based, Metric Based with Local Affinity Random J2ee containers to database 5 All oracle Net load balancing mechanisms (RAC to the rescue) System Failure 29
Page 1 and 2: Maximizing Availability with Oracle
Page 3 and 4: Agenda • Introduction • Oracle
Page 5 and 6: Oracle Application Server High Avai
Page 7 and 8: No Single Point of Failure infrastr
Page 9 and 10: Architecture of an Oracle Applicati
Page 11 and 12: Cluster Monitoring in iHAT
Page 13 and 14: Process Monitoring: OPMN • Monito
Page 15 and 16: Self Healing in OracleAS: OPMN −
Page 17 and 18: All sub-tier clusters •Webcache C
Page 19 and 20: Webcache Load-Balancing 19
Page 21 and 22: OracleAS OC4J Cluster Node 1 Web Ca
Page 23 and 24: Servlet/JSP Clustering in EM 23
Page 25 and 26: EJB Clustering • state replicatio
Page 27: Database Connection state − −
Page 31 and 32: Portal HA Browser Client OracleAS P
Page 33 and 34: Reports - High Availability • Pee
Page 35 and 36: Metadata and system services High a
Page 37 and 38: Cold Failover Cluster Clients Load
Page 39 and 40: Middle Tiers on Cold Failover Clust
Page 41 and 42: Clients Client Active Failover Clus
Page 43 and 44: Backup and Recovery • Backup and
Page 45 and 46: Disaster Recovery MT 1 MT 2 Infra C
Page 47 and 48: Standby Site Synchronization Oracle
Page 49 and 50: OC4J Hot Deployment* Hot Deployment
Page 51 and 52: No Single Point of Failure Infrastr
Page 53 and 54: ProLiant (Windows/Linux) DL360 DL36
Page 55 and 56: Split config HP9000/Integrity serve
Page 57 and 58: Summary • No Single Point of Fail
Page 59 and 60: Co-produced by:
Page 61 and 62: Itanium Roadmap - Phase 1 Currently
Page 63 and 64: Itanium Roadmap - Available platfor
Page 65 and 66: Rolling Upgrades Clients Clients Cl
Page 67 and 68: Backup slides OPMN 67
Page 69 and 70: The opmn.xml Configuration File Use
Page 71 and 72: Backup slides ID Management/ repCa
Page 73 and 74: IM-HA(rack-mounted) and repCa to RA

Maximizing Availability with Oracle Application Server 10g - OpenMPE

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