Oracle Application Server 10g:
Administer High Availability
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Contents
1 Introduction to Oracle Application Server High Availability Solutions
Objectives 1-2
What Is High Availability? 1-3
High Availability: Business Aspects 1-5 Types of Failures or Nonavailability 1-6 How to Improve Availability 1-7
Oracle Application Server Features for Improving Availability 1-8 Self-Healing: OPMN 1-9
Redundancy and Availability 1-10 OracleAS Cold Failover Cluster 1-11 OracleAS Cluster: Overview 1-12 Benefits of OracleAS Cluster 1-13
OracleAS Cluster and OracleAS Cold Failover Cluster 1-14 Backup and Recovery Paradigm 1-15
OracleAS Guard and the Disaster Recovery Paradigm 1-16 Designing for High Availability 1-17
Summary 1-18
2 Backing Up and Restoring Oracle Application Server
Objectives 2-2
Oracle Application Server Backup and Recovery: Overview 2-3 OracleAS Recovery Manager 2-5
OracleAS Recovery Manager: Files 2-6
Configuring OracleAS Recovery Manager Using Application Server Control 2-7 Manually Configuring OracleAS Recovery Manager 2-9
Backup Strategy 2-11
How OracleAS Recovery Manager Performs Backup 2-12 Creating a Record of the Configuration 2-13
OracleAS Recovery Manager Usage Examples 2-14 Types of Backup: Cold Versus Online 2-16
Types of Backup: Full Versus Incremental 2-17 Backing Up OracleAS Infrastructure 2-18 Performing Full Backup of Infrastructure 2-19 Full Backup Using Command Line 2-20 Portal Schema Validation Utility 2-21
Performing Full Backup of Middle Tier 2-23 Incremental Backups 2-24
Incremental Online Backup of OracleAS Portal 2-25 Performing a Backup After a Major Change 2-26 Logs and Output Files of a Backup Operation 2-27 OracleAS Recovery Manager: Customizing 2-28 Restore Strategy 2-29
Procedures for Recovery from Loss of Host 2-30 Recovery After Loss of Host 2-31
Backup Procedures for Recovery from Loss of Host 2-32 Restore Operations on New Host 2-33
Restoring OracleAS Infrastructure Configuration Files on the Same Host 2-35 Restoring Middle Tier on the Same Host 2-36
Improving Availability of the File-Based Repository 2-37
Relocating a File-Based Repository by Using Export and Import 2-38 Metadata Repository Flashback Query Feature 2-40
Summary 2-41
3 OracleAS Infrastructure Active–Passive Solutions
Objectives 3-2
OracleAS Infrastructure High Availability 3-3
Infrastructure High Availability: Previous Releases 3-4
OracleAS 10g Release 2 Infrastructure Active–Passive Configuration 3-5 OracleAS Cold Failover Cluster (Infrastructure) 3-6
OracleAS Cold Failover Cluster (Infrastructure): Normal 3-8 OracleAS Cold Failover Cluster (Infrastructure) Failover 3-9
OracleAS Cold Failover Cluster (Infrastructure) Preinstallation 3-10 Setting Up the Virtual Host 3-11
Setting Up the Network Interface 3-13 Setting Up the Shared File System 3-15 Port Allocation 3-16
Installing OracleAS Cold Failover Cluster (Infrastructure) 3-17 Accessing the Components After Installation 3-18
Starting OracleAS Cold Failover Cluster (Infrastructure) 3-19 Stopping OracleAS Cold Failover Cluster (Infrastructure) 3-21 Managing Failover 3-23
4 Middle Tier: Active–Passive Availability
Objectives 4-2
OracleAS Cold Failover Cluster (Middle-Tier) 4-3 OracleAS Cold Failover Cluster Coexistence 4-4 Implementation 4-5
Preinstallation Tasks for Single Oracle Home 4-6 Installing the Middle Tier 4-7
Postinstallation Tasks 4-8 Using chgtocmt 4-9
Completing the Postinstallation Steps 4-10 Actions at Failover 4-11
OracleAS Cold Failover Cluster (Web Cache) 4-13 Configuration Changes and Application Deployment 4-14 Summary 4-15
5 OracleAS Infrastructure: Active–Active High Availability Solutions
Objectives 5-2
OracleAS Infrastructure High Availability 5-3 Active Failover Cluster 5-4
OracleAS Infrastructure Active–Active Configurations in OracleAS 10g
Release 2 5-5
OracleAS Cluster (Identity Management) 5-6
OracleAS Cluster (Identity Management) Significant Points 5-7 Preinstallation Steps 5-8
Load Balancer Configuration 5-9
OracleAS Cluster (Identity Management) Installation and Configuration 5-10 Installing Distributed OracleAS Cluster (Identity Management) 5-11
Installing the First Node 5-12 Installing Subsequent Nodes 5-13
Tips: OracleAS Cluster (Identity Management) 5-14 Verify Installation Log Files 5-15
Failover for OracleAS Cluster (Identity Management) 5-17
Run-Time Properties of OracleAS Cluster (Identity Management) 5-18 Replication for Oracle Internet Directory 5-19
Identity Management with Multimaster Replication 5-20 Installing the Master Node (OID) 5-21
Installing the Replica Node (OID) 5-22 Enabling Multimaster Replication 5-23 LDAP (Fan-Out) Replication 5-24
Active–Active Configuration for OracleAS Metadata Repository 5-25 Summary 5-26
6 Middle Tier Active–Active Configurations
Objectives 6-2
OracleAS Cluster: Types 6-3
DCM-Managed OracleAS Cluster: Terminology 6-4 DCM-Managed OracleAS Cluster: Architecture 6-5 Configuring DCM-Managed OracleAS Clusters 6-6 Considerations for Adding an Instance to a Cluster 6-7 Creating and Managing an OracleAS Cluster (J2EE) 6-8 Starting and Stopping an OracleAS Cluster (J2EE) 6-9 Load Balancing: Crash Prevention 6-10
Load Balancing Algorithms Used by mod_oc4j 6-11
Configuring Load Balancing for OracleAS Clusters: Example 6-13 OC4J: HTTP Session Replication Concepts 6-14
OC4J Stateful Session Bean Replication Concepts 6-15 OracleAS Cluster (Portal): Overview 6-16
OracleAS Cluster (Portal): Preinstallation 6-17 Steps to Configure OracleAS Cluster (Portal) 6-18 Installing the First OracleAS Portal Instance 6-19
Configuring the First Instance to Work with Load Balancer 6-20 Installing and Configuring the Second OracleAS Portal Instance 6-21 Configuring the Second OracleAS Portal Instance 6-22
High Availability for Business Intelligence and Forms 6-23 JDBC Fast Connection Failover: Overview 6-24
Fast Connection Failover Processing 6-25 Summary 6-26
7 Configuring and Managing OracleAS Cluster (Web Cache)
Objectives 7-2
OracleAS Cluster (Web Cache): Overview 7-3 OracleAS Cluster (Web Cache): Concepts 7-4
Differentiating Between Cluster and Cluster Member Settings 7-5 How OracleAS Cluster (Web Cache) Works 7-6
Distributing Cache Content 7-7 Detection of Failure and Failover 7-9
8 OracleAS Disaster Recovery
Objectives 8-2
Disaster Recovery 8-3
Disaster Recovery Paradigm 8-4 Host Naming Terminology 8-6
Disaster Recovery: Normal Mode 8-7 Disaster Recovery: Failover Mode 8-8 Topologies: Symmetric Topology 8-9 Simple Asymmetric Topology 8-10
Setting Up the OracleAS Disaster Recovery Environment 8-11 Performing Installations 8-12
Oracle Application Service Guard 8-13 OracleAS Guard Components 8-14 OracleAS Guard Servers 8-15 OracleAS Guard Clients 8-16 OracleAS Guard Operations 8-17 Disaster Recovery Operations 8-18 Step 1: Prepare the Production Site 8-19 Step 2: Prepare the Standby Site 8-20 Step 3: Instantiate the Standby Site 8-21 Step 4: Synchronize the Standby Site 8-22 Step 5: Switchover 8-23
Step 5A: Failover 8-24
Step 6: Reinstantiate After Failover 8-25 DNS Operations 8-26
Summary 8-27
9 Transforming OracleAS Installations to Become Highly Available
Objectives 9-2
Transformation: Overview 9-3
Source OracleAS Infrastructure Configurations 9-4 Target: OracleAS Cluster (Identity Management) 9-5
Target: OracleAS Cold Failover Cluster (Identity Management) 9-6 Transformation to OracleAS Cluster (Identity Management) 9-7 Transforming to OracleAS Cluster (Identity Management) 9-8
Transforming to Distributed OracleAS Cluster (Identity Management) 9-9 Transforming to OracleAS Cold Failover Cluster (Identity Management) 9-10 Transforming to Distributed OracleAS Cold Failover Cluster
(Identity Management) 9-11 Summary 9-12
Appendix A: Practices
Appendix B: Practice Solutions
