Re: How to lookup Qshell error messages? -- JAVA400-L


Glenn said:
> Yes, thanks, that was the problem.  What's a BCI job?
A BCI job is a 'Batch Immediate' job.
A Batch immediate job is a new job and its
process structure created by avoiding much of the typical
work management startup associated with a Job on the
As/400. It avoids things like job queues and routing
entries. It copies much of its environment/attributes
(priority, subsystem, and lots of other stuff)
directly from the parent job.

Its about 3-5 times cheaper than a traditional job
start mechanism (i.e. SBMJOB)
Prestart jobs (job pooling) are another way that
we attempt to optimize or (pay for later/hide)
the cost of AS/400 process startup.

This type of job becomes a closer match for places where you
would use fork()/spawn() in your application. In fact, spawn()
is implemented using batch immediate jobs.


Simon said:
> If I had done this I'd be looking at a single BCI job per shell instance
to
> handle the commands and queue them via user queues. Admittedly that is
> just off the top of my head and there may be other considerations I've
not
> considered.  It might not implement the Unix philosophy properly but then
> ANU (AS/400s NOT UNIX).
Yeah, but the whole point is that you want those very applications and
utilities because
customers ARE clamouring for them. The apps/utilities require the unix
philosophy, in
addition to enabling the programming model that people want (yes, people DO
want
that model).

You may think we make mistakes when we do that, and clearly we do.
However, that stuff is seldom just for the fun of it, but instead is
usually to hook
particular applications or tools.

I.e. You're correct. Our customers DON'T want unix, they just want UNIX
application X.
On their AS/400. If we can get that application easily/cost effectively,
we can get the customers.

Typically application X vendor just isn't interested in the AS/400 until
the
operating system makes it very easy to port.
Hence, we run some of everything.

I could be wrong, but that's my perception of the way I see it working
again and again here.


"The stuff we call "software" is not like anything that human society
  is used to thinking about. Software is something like a machine, and
  something like mathematics, and something like language, and
  something like thought, and art, and information...
  but software is not in fact any of those other things."
Bruce Sterling - The Hacker Crackdown

Fred A. Kulack  -  AS/400e  Java and Java DB2 access, Jdbc, JTA, etc...
IBM in Rochester, MN  (Phone: 507.253.5982   T/L 553-5982)
mailto:kulack@us.ibm.com   Personal: mailto:kulack@bresnanlink.net
AOL Instant Messenger: Home:FKulack  Work:FKulackWrk

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