OK - Jim Here's the big picture...
1) AS/400's are damn good web servers - I've peaked @ 20,000 visitors a
day with a single 270.  Most of my problem was with Net.Commerce and
older  versions of it.
2) That same 270 can handle 800 simultaneous CGI requests, 2000
simultaneous Cached HTML requests... and I've come close to seeing those
peaks.
3) Load balancing is a fact of life in the web world.  IBM needs to make
it more lucrative for people to do it.  30 270's pointing to the same
back end RAIDED disk acting as web servers etc... is a great model to go
by - but is not possible with current OS/400 unless you write/buy
mirroring software between the boxes with mucho redundant disk.  Most of
the time with BIG web sites, they run out of bandwidth before they run
out of CPU - another fact of life...   Now a load balanced LPARed 840
with 32 processors pointing to a single chunk of disk - this I could
reach my hands around!!  I can send ALL of my Net.Data pointing to
another server, and compile all my RPG arounf the DDM files... but I
digress...
4) The AS/400 isn't the fastest kid on the block - but what the heck are
you serving?  Yahoo?  E-Bay?  When your back end server is AS/400 &
you're building a B2B - do it on an AS/400!  If you're trying to impress
someone with FLASH etc... you can STILL use an AS/400 - but these cheep
Linux boxes seem to do well (and the AS/400 is NOW doing linux!!)
5) E-commerce is a touchy subject with me - but look @
www.palmbeachjewelry.com - that box pops up... all RPG CGI routines
running it & Net.Data... not too shabby...

Check out my home site - www.as400nut.com - that's a SMALL as/400 - the
Counter on the bottom is Net.Data - and I'm building some serious
examples of Net.Data code for people to play with.  That is an 18cpw
box.  When you talk WAS or Domino or ANY serious Unix based
functionality - that's when the SERIOUS hardware needs to be considered.
Java can bring a system w/out enough cylinders down!  Firing up the
Apache admin server on my system is like kicking it in the nuts, but the
AS/400 doesn't fall down & clutch 'em - it plows onward and limps for a
bit until all the Java has compiled & is in memory... then it levels
out.

Message: 3
From: Jim Damato <jdamato@dollargeneral.com>
To: "'midrange-l@midrange.com'" <midrange-l@midrange.com>
Subject: RE: Trivia:  Processor MHz
Date: Thu, 27 Dec 2001 15:33:38 -0600
Reply-To: midrange-l@midrange.com

>Steve:
>This is not trivial.  The slow cpu of the iSeries prevents modern
>programming languages from being used on our system.

>Leif: (taken somewhat out of context)
>Use the AS/400 for what it is good at.
>Use the right tool for the job. Use an Intel
>screamer for what it does best.

I don't know if it boils down strictly to programming languages, but I
know
what Steve means.  Even two and three year old dinosaur AS/400's are
inadequate as web servers (or Domino app servers, etc.) because some
online
responses boil down to the speed of one processor.  A single user
transaction can require much, much more processing in an HTML or Java
application.  A 4550 CPW 740 might serve as a pathetic web server.  A
new
270 with a fraction of the CPW would blow the doors off the 740 in a
broad
range of newer technology applications.

CPW is a measure of traditional AS/400 work.  Processor MHz might be a
more
meaningful measure in some applications, but it has to be taken in
context.
MHz (or MIPS, etc.) "scores" do not compare one to one across chips.
Still,
it's as Leif suggested -- our PHB's want it dumbed down to one number.
Remember when you'd buy a new stereo and your friends would ask, "How
many
WATTS?!"

I don't, however, think you necessarily need to use an Intel screamer.
There are a great number of new Intel, HP, Apple, IBM iSeries/pSeries,
etc.
processors that are fast enough to do the job.  You don't have to buy
the
fastest if there are alternatives that more than meet your needs.

-Jim

James P. Damato
Manager - Technical Administration
Dollar General Corporation
<mailto:jdamato@dollargeneral.com>


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