Hi Thorbjørn;
You are asking about performance: The best way to put is with an example:
MAZDA motors in Denmark are using IceBreak and have 250 concurrent users
running on an old AS/400 model 270 - OS/400 ver 5.1. It is document portal
with registration papers so all sessions are running HTTPS.
It runs so we so they have invited yet 150 more concurrent users from FORD
motor company - now running on the same box - the same application.
Any other product on the system i that I am aware of will collapse with the
same kind of workload.
There is no need to front-end IceBreak with Apache since the web-server in
IceBreak is faster and has a smaller footprint. However, Apache has some
unique features with routing, redirection and rewrites etc. so it make sense
in some cases. Actually IceBreak.org is front-ended with an Apache for exact
same reason.
Benchmark test shows that Apache is 11% slower that IceBreak when doing
plain file serving. When it comes to CGI compared to the application serving
in IceBreak it is trickier. One CGI-DEV2 program with one client has the
same ration - 11% slower that at similar application in IceBreak. But when
we try to scale it to 100 concurrent users the numbers are quite different:
82% slower and the processor is utilisation goes from 15% to 86%. With
IceBreak it goes from 15% to 22%.
The above figures are from a TestBench on a 520. The application was a
simple RPG list producing 100 rows reading one file.
When it comes to EGL / WebSphere - we don?t have any figures yet. However I
have never seen a 270 running WebSphere yet :)
Best regards
Niels Liisberg
System & Metode Technologies
Håndværkersvinget 8, DK-2970 Hørsholm
Phone: +45 70 20 36 10
Fax: +45 70 20 30 11
Direct: +45 45 177 055
Mobile: +45 31 158 861
E-mail: nli@xxxxxxxxxxxxxxxxx
-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On
Behalf Of Thorbjørn Ravn Andersen
Sent: 27. maj 2008 18:40
To: Web Enabling the AS400 / iSeries
Subject: Re: [WEB400] Impressions of EGL - Part Duex
Niels Liisberg skrev den 27-05-2008 14:13:
However, IceBreak became first a commercial product for system i in 2006'.
But it started back in 1994 in Denmark as a communication middleware
product
at PBS - VISA/DANKORT for card clearing (and is still in full production)
So no; IceBreak is not written in RPG. It is written in C / and C++ but
running 100% in the ILE environment - serving ILE. So to say; the
"distance"
from your application to the client is as small as possible. This really
reduces the complexity and reduces overhead for RPG/COBOL programmers
compared to run these languages within PHP, EGL and even as web-services
in
WebSphere.
So what you say is that you have ported a C/C++ web server to ILE and
that it allows to call ILE programs easily. Ok, that makes sense.
What loads does it support and may it be necessary, like recommended for
slow sessions, to put a proxy Apache in front to get the expensive
request finished to serve a new request?
In other words, I'd like some performance numbers :)
midrange.com
