WebSphere WebSphere Enterprise Service Bus, Version 6.0.1 Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Single-server SCA.SYSTEM bus

The simplest topology is a bus consisting of a single server, as created if you install WebSphere ESB in a standalone server profile.

In a single-server SCA.SYSTEM bus, there is only the one server as a bus member. When you install a mediation module into WebSphere ESB, the queue destinations used by the module are defined on that bus member. These queue destinations are used by the SCA runtime exploited by the mediation module as a robust infrastructure to support asynchronous interactions between components and modules.

A bus environment showing one service integration bus, with one ESB server as a bus member. This figure also shows an SCA module deployed into the bus environment, where the destinations needed are assigned to the bus member.A bus environment that comprises one
service integration bus. The bus contains one server as a bus member that
provides the messaging engine for the bus.

In a standalone profile, there can be only one messaging engine in a bus, a topology that is adequate for some applications.

A single messaging engine might not be adequate if the number of client connections becomes excessive, if the rate of message throughput cannot be sustained by the one messaging engine, of if the size of messages needs more space than the one messaging engine can provide in its data store.

To add more than one messaging engine to a service integration bus, you need to use a profile for a managed node in a deployment manager cell.

Related tasks
Planning issues common to all bus topologies
Planning a single-server bus topology

Concept topic

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Timestamp iconLast updated: 8 Dec 2005
http://publib.boulder.ibm.com/infocenter/dmndhelp/v6rxmx/index.jsp?topic=/com.ibm.websphere.wesb.doc\concepts\cjj0070_.html

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