Re: FW: Java Vs RPG on iSeries

[Dieter.Bender@xxxxxxxxxxx (Dieter Bender)]

Joe,

I agree that rpg programmers have their place in the it market and java
programmer have.

I don't have any doubt about your knowledge of java, I;m teaching java in
germany since V4R2 of OS/400 and so I know your Books, articles and quite a
lot of your activities. I wrote the first articel to java on as400 for german
midrange magazin and it was printed before the american papers came out with
java on as400.

I think a java400-l has to do the job to clearify what and how to do with
java on iSeries and I think thats a critical mission for the existence of the
as400.

Let us talk about a batch job on as400 (might be rpg or cobol). the as400 has
8 CPUs, the batch job runs 4h and it is doing a lot of work. the job is not
cpu bound, it uses maybe 20% of one cpu and its running in the night time.
more than 90% of the cpu power is unused. I've seen such jobs over the time
and I see this jobs rather often (I'm consultant besides my teaching and
writing).

And now the java way to do this.
I have one java main job, this job opens up up to 16 connections to the
database, then the job splits into up to 16 threads, each thread with its own
connection to the database (= Server job). Now I have 2 jobs per cpu running,
doing my work. Thats the way o get more speed by adding a lot of overhead. (I
don't want to discuss how to do this in rpg, maybe in another list). the
balance of work is easy scalable by using stored procedures, by instance to
get workload to the database jobs.

I must confess, that my first statement on this was a little bit provocative,
but thats the only way to get attention for this.

Dieter