[Enterprise Extensions only]

WebSphere Application Server cloning and MQSeries clustering

This topic provides a summary of information about using WebSphere Application Server horizontal cloning with MQSeries server clustering support. It describes a scenario that shows how the extended messaging service can be configured to take advantage of MQSeries server clustering and provides some information about how to resolve potential runtime failures in the clustering scenario. The information in this topic is based on the scenario shown in [WebSphere Application Server horizontal cloning with MQSeries clustered queues].

For a WebSphere application server configured to use the extended messaging service, each JMS listener is used to retrieve messages from destinations defined to the server. In the following information the listener configurations are the same for each WebSphere application server. Each application server host contains a WebSphere application server and an MQSeries server. If a host is only used to distribute messages, it only contains an MQSeries server. There can be many servers defined in the configuration, although for simplicity the information in this topic is based on a scenario containing only three servers as shown in [WebSphere Application Server horizontal cloning with MQSeries clustered queues].


Extended messaging scenario showing 2 WAS server hosts, with WAS horizontal cloning, and a messaging host for MQSeries server clustering

WebSphere Application Server horizontal cloning with MQSeries clustered queues. This figure shows two WebSphere Application Server hosts, with horizontal clustering, and a messaging host used to distribute messages for MQSeries server clustering. For more information, see the text that accompanies this figure.

The scenario shown in [WebSphere Application Server horizontal cloning with MQSeries clustered queues] comprises the following three hosts:

Recovery scenarios

There are several failure scenarios that could occur with the clustering configuration; for example: