AN EFFICIENT RECOVERY MECHANISM WITH CHECKPOINTING APPROACH FOR CLUSTER FEDERATION

Checkpoint and recovery protocols are commonly used in distributed applications for providing fault tolerance. A distributed system may require taking checkpoints from time to time to keep it free of arbitrary failures. In case of failure, the system will rollback to checkpoints where global consistency is preserved. Checkpointing is one of the fault-tolerant techniques to restore faults and to restart job fast. The algorithms for checkpointing on distributed systems have been under study for years. It is known that checkpointing and rollback recovery are widely used techniques that allow a distributed computing to progress inspite of a failure.There are two fundamental approaches for checkpointing and recovery.One is asynchronus approach, process take their checkpoints independenty.So,taking checkpoints is very simple but due to absence of a recent consistent global checkpoint which may cause a rollback of computation.Synchronus checkpointing approach assumes that a single process other than the application process invokes the checkpointing algorithm periodically to determine a consistent global checkpoint