John
At IBS we deploy our EJB servers (EAS) across the machines on the
network as necessary. Each server listens for work requests and will
fill the request (eg. request for a reference to an EJB) if (1) it has a
bean that can do the work and (2) if it (the server) is the best choice
for doing the work. The latter is done by load balancing messages across
the 'federation'. Clients send requests onto the net via MultiCast. of
course, the clients are not directly aware of this as they use the
methods of a class they extend from to get it done. The namespace that
allows the client to lookup/request and EJB is as in the spec (JNDI
etc). Lastly, each EAS is a JINI citizen.
So what does all this come down to? Scaling, Failover, Performance.
Call if you want to know more (@ the 414 number).
Tony
----
John B Geurink wrote:
>
> Hi All,
> I'm new to your group and this technology and find it very interesting.
> We are undertaking a development effort to move from our traditional two-tier
> procedural based architecture to a three tier object based. We will be
> kicking off a pilot project that will try and develop EJB's that will replace
> pieces of our COBOL system. Our concern deals with transactional capacity.
> We are unsure of Java's ability to handle large amounts of data and
> transactions. The system that we build, has to be scaleable. We have clients
> that produce 1,000 to 250,000 transactions a day. How much of the
> scalability falls on the Web Application Server's ability to scale/load
> balance? When it gets right down to it, you can't just "throw more hardware"
> at it. We have talked to several industry leading vendors and practitioners
> but have yet to get a resounding YES. We do have a better feeling about this
> after our meeting with WebLogic last week. Can anyone give me a feel for
> EJB's ability to handle this type of application?
> A related question is anybody have pros/cons for the IDE's VisualAge
> Java and Visual Cafe? What about Web Application Servers like WebLogic,
> WebSphere, NetDynamics, and Sapphire Web?
>
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--
Tony Holderith | Interactive Business Solutions
[EMAIL PROTECTED] | NetCentric Solutions
http://www.interactivebusiness.com | Business Objects
Phone: 310.414.6760, 805.893.4503 | FAX: 310.414.6759
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