Arranging a Fault-Tolerant Transport Bridge

You can run two or more bridge processes for fault-tolerant operation. Although this feature ensures automatic and quick recovery, failover might leave some messages unforwarded.

Prerequisites

Fault-tolerant bridges rely on the group facility to coordinate fault tolerance.

Procedure

  1. Ensure appropriate network connectivity, so that each bridge process can communicate with the group server over a static TCP transport.
  2. Configure bridges (see Transport Bridge Configuration).
  3. Start two bridge processes on separate host computers. Specify the same command line arguments to each process (see Transport Bridge Executable Reference).

Result

The group facility automatically enables only one bridge process at a time.

  • Shared Memory Transports and Fault-Tolerant Bridges
    Shared memory transports require that all client processes run on the same host computer as the shared memory segment. As a result, when bridging shared memory transports, you cannot use redundant processes on separate host computers as a fault tolerance mechanism. Instead you could arrange fault tolerance by immediately and automatically restarting the bridge process.
Related concepts
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