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Working in Active/Active mode

 

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 you want, in Active/Passive Mode). If you 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.

If you are using MSCS together with Microsoft Transaction Server (COM+), we cannot use Active/Active mode. This is because, to use WebSphere MQ with MSCS and COM+:

• Application components that use WebSphere MQ's 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

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