1. Fault-Tolerant CORBA
By,
Srinivas Seshu

2. Fault Tolerant CORBA (FT-CORBA)
What if one of the CORBA objects fail by crashing?

3. FT-CORBA Fault Tolerance is achieved through: Object Redundancy
Fault Detection
Fault Recovery

4. Object Redundancy Replicas of object Object Group
May maintain an internal state (stateful/stateless)
Replica consistency has to be maintained
Object Group
Interoperable Object Group References (IOGR) . Points to either:
Object Group Member (OGM)
Gateway accessing the OGM

5. Object Redundancy
IOGR helps clients to uniformly access stateless/stateful object groups while benefiting of replication & failure transparency.

6. Replication Manager Responsible for Object Redundancy
Create & Manage Object groups & object group members
Creates member references
Monitors a min. no. of members are alive

7. Fault Management
Fault Detector
Fault Analyzer
Fault Notifier

8. Recovery Management
Logging
Recovery

9. Thank You