This illustration shows the hierarchy of high availability architectures. At the base of the high availability pyramid is the core database, which includes the following high availability features:

• Flashback technologies

• Online redefinition and reorganization

• Managed backup and recovery

At the next level of availability are the following architectures:

• Oracle Database 10g with RAC

• Oracle Database 10g with Data Guard

• Oracle Database 10g with Streams

Oracle Database 10g with RAC has the following high availability features:

• Fast node and instance failover

• Rolling patch upgrade

Oracle Database 10g with Data Guard has the following high availability capabilities:

• Disaster recovery

• Rolling database upgrade

Steams has the following high availability capability:

• Replication

At the top of the high availability pyramid is the most highly available architecture, Maximum Availability Architecture, which builds on Oracle Database 10g with RAC and Oracle Database 10g with Data Guard.

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