Re: What About Price vs. Performance?

["Joe Pluta " <joepluta@xxxxxxxxxxxxxxxxx>]

<ROTFL>

Leif, you're kidding me, right?  Back in the old days, it took 100msec to read 
a single record from the disk, and we managed just fine.  Can my model 270 
handle hundreds of simultaneous users?  Not now, no.  According to my figures, 
it can only handle about 10 users.  But I haven't tried to extrapolate stress 
numbers, either.

Anyway, it's not an issue.  Here's the beauty of my approach, Leif.  ALL of my 
HTML generation can be moved off of the AS/400 to one of those blazing web 
servers Scott Klement talks about - WITHOUT A SINGLE LINE OF CODE CHANGE TO MY 
AS/400 APPLICATION.

You see, by completely splitting the HTML generation from the business 
application, I've created a true n-tier design.  I can put as many $1000 web 
application servers on the front line as I want, all accessing the AS/400 for 
data.  The code doesn't change, because the Java Toolbox that I use for 
communication is 100% Java, and will run on any Java-enabled platform.  On top 
of that, I'm looking into using JDBC procedure calls, which will make even the 
toolbox unnecessary.

So if I have UI problems, I simply add another $1000 box and get another 100 
users.  There's no relational database requirements on those boxes, so they 
absolutely fly.  The AS/400 is limited solely by its database processing 
capabilities, not its UI requirements.

You can't do that with green screens or with RPG-CGI.

Joe


---------- Original Message ----------------------------------
No, but I wrote my first screen handler for the AS/400 on a B30
back in 1989. I have here in front of me my log book from that
time. I did a timing test of building/displaying a screen (worst
case - full of fields and data). My log book entry for 1989/4/20
says 46msec. On the 150, that same screen takes only 1.35msec,
so there has been *some* progress. I would hate to have that
go back up to 100msec as Joe seems to get for generating
HTML. How can you support several hundred users with
100msec CPU time per screen?


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