Re: Does jBoss work on iSeries?

[Dieter Bender <dieter.bender@xxxxxxxxxxxx>]

Hi,

its one of the nice things with EJBs to write a distributed application 
(nearly) without dealing with distribution aspects.

BTW: At the moment I have another guy (in France) dealing with problems with a 
badly sized system (sized by ibm France) database and WebsFear on a single 
processer 810 with 7 of the slowest disks.

Dieter Bender

On Dienstag, 9. März 2004 17:36, Nathan M. Andelin wrote:
> David,
>
> I think you need to take into account that threads under OS/400 have
> processor "affinity", meaning that once a thread is dispatched to a
> processor, it tends to remain associated with that processor, to avoid
> cache reloading.  Several good sources say that cache reloading can have a
> severe, negative impact on performance.  EJB architecture offers a means of
> dispatching workload to other processors, even on one box.
>
> Say a Servlet receives a request to summarize sales by state and display
> the results.  The process of summarizing sales by state may be a fairly CPU
> intensive activity that needs to be synchronized per user.  Using EJBs,
> summarizing sales by state might be dispatched to one processor, while
> generating the HTML might be dispatched to another, so that when multiple
> requests are received at the same time, the 2nd isn't waiting for the 1st
> to complete.
>
> I agree completely that distributed architectures under J2EE have costs and
> problems associated with them, but what is the alternative when CPU
> intensive workloads are involved?
>
> Nathan.
>
>
>
> ------------------------------
>
> message: 6
> date: Mon, 08 Mar 2004 14:46:09 -0700
> from: "David Morris" <David.Morris@xxxxxxxxxxxxx>
> subject: RE: Does jBoss work on iSeries?
>
> Nathan,
>
> The current upper limit for the iSeries of 32 processors/256G main memory
> is likely to meet most needs business needs. There are a lot of costs in a
> distributed application and those costs are often overlooked. A single
> system is much simpler whether it is an iSeries or other server has few
> points of failure, is much easier to test, and can take full advantage of
> native data access.
>
>
>
>
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-- 
mfG

Dieter Bender


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