Backend Recovery
Router Recovery
Frontend Recovery
Recovery Scenarios
If standby or shadow servers are available on another backend node, operation of the rest of the system will continue without interruption, using the standby or shadow server.
If a backend processor is lost, any transactions in progress are remembered by RTR and later recovered, either when the backend restarts, or by a standby if one is present. Thus, the distributed database is brought back to a
If a router fails and another router node is available, all in- progress transactions are transparently
If a frontend is lost:
•All transactions committed but not completed on the frontend node at the time of failure will be completed.
•All transactions started but not committed on the frontend node at the time of failure will be aborted.
Reliability Features
