High Availability [Oracle]

An environment can be said to be highly available if it

• has both reliable hard and software.
• is recoverable
• it detects errors
• operates continuously

High availability can be achieved with the following Oracle features:

• RAC
• data guard
• Streams
• Online reorganizations
• transportable tablespaces
• automatic storage management (ASM)
• Flashback
• dynamic reconfiguration
• fail safe
• RMAN
• flash recovery area
• hardware assisted resilient data (HARD)initiative

Here are five typical HA architectures with Oracle.