Re: PHP update and directions

Shalom,

There was a lot of useful information in the links you provided, and I hope 
people will try PHP on the I5.

The performance study prepared by IBM sounded impressive at first - a 
shopping-cart application supporting 10,000 concurrent users, using a dual-core 
database server, and five dual-core web application servers.  If I understand 
correctly that worked out to 12 CPUs and 24 Gig of memory across the server 
farm.

But the study acknowledged a "think time" of 160 seconds between requests.  If 
I understand correctly, that means the shopping-cart application was handling 
at it's peak, 62.5 requests per second [10,000 users divided by 160 second 
think time].

I run RPG based web applications that use native database access methods on a 
single CPU model 520 which supports a higher throughput rate than that.

Scalability is typically discussed in terms of how loads are balanced across 
server farms, but who really wants a farm?

Nathan.



----- Original Message ----
From: Shalom Carmel <shalom@xxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Sent: Thursday, October 26, 2006 4:35:42 AM
Subject: Re: PHP update and directions

Just a few followups:

PHP updates and fixes can be uninstalled - there is a rollback procedure.

Tony Cairns from IBM has written an excellent presentation comparing
php and net.data.
http://www.common.org/conferences/sguide/f06/510101.htm

Information about DB2 performance (not on iseries)
http://devzone.zend.com/node/view/id/915
http://tinyurl.com/y35k9q

Links to free PHP modules and  solutions
http://pecl.php.net/
http://sourceforge.net/

Comparison between .net and php
http://www.oracle.com/technology/pub/articles/hull_asp.html


Regards,
Shalom Carmel
-----------------------
www.hackingiseries.com