Work in Active/Active mode in MSCS

Both computers in the MSCS cluster can run queue managers in Active/Active mode. You do not need to have a completely idle machine acting as standby (but we can, if we want, in Active/Passive Mode).

If we plan to use both machines to run workload, provide each with sufficient capacity (processor, memory, secondary storage) to run the entire cluster workload at a satisfactory level of performance. Note: If we are using MSCS together with Microsoft Transaction Server (COM+), you cannot use Active/Active mode. This is because, to use IBM MQ with MSCS and COM+:

  • Application components that use IBM MQ COM+ support must run on the same computer as the Distributed Transaction Coordinator (DTC), a part of COM+.
  • The queue manager must also run on the same computer.
  • The DTC must be configured as an MSCS resource, and can therefore run on only one of the computers in the cluster at any time.

Parent topic: Hints and tips on using MSCS