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Aggregation blocks (FanOut and FanIn)
Aggregation is an important MFC pattern. It enables a single inbound request to map into
multiple outbound service invocations, the responses from which can be aggregated into a
single response to the original request. Before you develop mediations using aggregation
design patterns, you need to consider several performance factors. See the developerWorks
topic about best practices, “Aggregation design patterns and performance considerations in
WebSphere Enterprise Service Bus V7.5” at the following location:
http://www.ibm.com/developerworks/websphere/library/techarticles/1111_norris/1111_
norris.html
Configuring Mediation Flow Component resources
When creating resources using Integration Designer, the application developer might choose
to use preconfigured MFC resources or let the tool generate the mediation flow-related
resources that it requires. Both approaches have their advantages and disadvantages.
Preconfigured resources help in the following circumstances:
► Existing resources are to be used
► External creation and tuning scripts are to be applied
Preconfigured resources also allow easier post-deployment adjustment.
Tooling-created resources are suitable if no further need exists for creating resources using
scripts or the administrative console. Most performance tuning options can be changed
because they are now exposed in the tooling.
In our performance tests, we used preconfigured resources because segregating the
performance tuning from the business logic makes it possible to maintain the configuration for
different scenarios in a single script.
3.3 Browser environment considerations
When using a browser for developing or evaluating Business Process Manager client
solutions through the Process Portal or Business Space, developers often alter the
configuration of the browser to perform debugging, tracing, and other browser functions.
However, some of these configuration changes can dramatically affect the performance of the
Business Process Manager solution. Before rolling out a solution to production or obtaining
performance measurements, review this section and observe its guidelines.
Disable or uninstall add-ins or extensions for production use
An important consideration is using add-ins or extensions for your browser environment. If
you experience performance problems while using the browser, make sure you disable or
uninstall all add-ins or extensions unless they are necessary.
Avoid Developer Tools render or compatibility mode in Internet Explorer
In Internet Explorer (IE), placing the browser in compatibility mode or in a render mode
equivalent to an older browser version by using the Developer Tools is possible. This option
can be useful for developing or debugging solutions (for example, making an IE 8 browser
behave as an IE 7 browser for compatibility testing). However, make sure that you do not use
these settings in production.
44 IBM Business Process Manager V8.0 Performance Tuning and Best Practices