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4.4: Personalizing applications >
4.4.1: Tracking sessions >
4.4.1.1: Session programming model and environment >
4.4.1.1.7: Tuning session support >
4.4.1.1.7.2: Tuning session support: Session affinity
4.4.1.1.7.2: Tuning session support: Session affinity
In a clustered environment,
the Session Manager requires an affinity mechanism
so that requests for a particular session are always sent to the same server.
It also provides for better performance, because the sessions are cached in memory.
Session affinity is provided in a server group by the Web server plug-ins.
In clustered environments other than server groups,
an affinity mechanism (for example, IBM WebSphere Edge Server affinity) must be used.
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