No subject

Key benefits
* Faster and cheaper accommodation of existing systems.
* Increased flexibility; easier to change as requirements change.
* Standards-based.
* Scales from point solutions to enterprise-wide deployment (distributed bus).
* Predefined ready-for-use service types.
* More configuration rather than integration coding.
* No central rules engine, no central broker.
* Incremental changes can be applied with zero down-time; enterprise
becomes "refactorable".

Key disadvantages
* Enterprise Message Model is usually required, resulting in
additional management overhead. May not be a simple task to achieve
many disparate systems collaborating on message standards.
* Requires ongoing management of message versions to ensure the
intended benefit of loose coupling. Incorrect, insufficient, or
incomplete management of message versions can result in tight coupling
instead of the intended loose coupling.
* It normally requires more hardware than simple point to point messaging.
New skills needed to configure, manage, and operate an ESB.
* Extra overhead and increased latency caused by messages traversing
the extra ESB layer, especially as compared to point to point
communications. The increased latency also results from additional XML
processing, as the ESB normally uses XML as the communication
language.
* Some critics remark that ESB require a significant effort to
implement, but produces no value unless SOA services are subsequently
created for the ESB.[1]

--------------------------------

Regards

Teravus

On 3/24/09, doug.lundin at gmail.com <doug.lundin at gmail.com> wrote:
> All,
> Suspect the notion of using an ESB with OpenSim would be seen as a feature request. But, am curious if anyone has thought about such an infrastructure approach and pros/cons for this project. How might it relate to the Grid?
> Would be interested in hearing your thoughts.
> Doug
> Sent via BlackBerry by AT&T
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