Protection from Planned and Unplanned Down Time

Oracle Fusion Middleware High Availability Framework 2-17 Figure 2–5 Production and Standby Site for Oracle Fusion Middleware Disaster Recovery Topology

2.4 Protection from Planned and Unplanned Down Time

The following tables list possible planned and unplanned downtime and suggested solutions for these downtime possibilities. Table 2–1 describes planned downtime: Production Active Site Standby Passive Site PRODSTOR Firewall DMZ Public Zone Web Tier Web Hosts Application Cluster Security Cluster Disc Replication Oracle Data Guard Shared Storage System Database Cluster Firewall DMZ Secure Zone Application Tier Firewall Intranet Data Tier Internet Application Database Security Web WAN Load Balancer WEBHOST1 WEBHOST2 APPHOST1 APPHOST2 OIDHOST1 OIDHOST2 DBHOST1 DBHOST2 Load Balancer STBYSTOR Web Hosts Application Cluster Security Cluster Shared Storage System Database Cluster Application Database Security Web Load Balancer WEBHOST1 WEBHOST2 APPHOST1 APPHOST2 OIDHOST1 OIDHOST2 DBHOST1 DBHOST2 Load Balancer 2-18 Oracle Fusion Middleware High Availability Guide Table 2–2 describes unplanned downtime: Table 2–1 Planned Down Time Solutions Operations Solutions Deploying and redeploying applications Hot Deployment Patching Rolling Patching Configuration Changes Online configuration Changes Change Notification Batching of changes Deferred Activation Scalability and Topology Extensions Cluster Scale-Out Table 2–2 Unplanned Down Time Solutions Failures Solutions Software Failure Death Detection and restart using Node Manager for Java EE and OPMN for system components. Server Clusters Load Balancing Cold Failover Clusters Server Migration Service Migration State Replication and Replica aware Stubs Hardware Failure Server Clusters Load Balancing Server Migration Clusterware Integration Data Failure Human Error Backup and Recovery Site Disaster Oracle Fusion Middleware Disaster Recovery Solution Note: The architectures and deployment procedures defined in this guide enable simple clustered deployments. The procedures described in these chapters can be used as a building block to enable this and other similar high availability topologies for these Fusion Middleware components. It is also expected that production deployments will use other required procedures, such as associating security policies with a centralized LDAP server. For complete details of secured, multi-tiered architecture, and deployment procedures, please refer to the Enterprise Deployment Guide for the component you are configuring. 3 High Availability for WebLogic Server 3-1 3 High Availability for WebLogic Server This chapter describes the Oracle WebLogic Server high availability capabilities used to provide Oracle Fusion Middleware high availability. ■ Section 3.1, What Is a WebLogic Server Cluster?