Mark Post wrote:
On Tue, Feb 19, 2008 at 8:37 AM, in message
<[EMAIL PROTECTED]>, Paul Gilmartin
<[EMAIL PROTECTED]> wrote:
-snip-
Now I'm confused. I've seen flat denials among these lists from IBM
employees that IBM's HTTPD is Apache-derived. But which HTTPD? So:
o How many HTTP servers does IBM supply for z/OS?
Currently, only one: IBM HTTP Server (IHS). WAS is not a web server, it is a
Web Application Server, i.e., a J2EE monster.
o Which one(s) are Apache-derived?
Since there's only one, all of them. :) If you go back and do some Google
searches, you'll likely find the various stories of how IBM got involved with
open source software to start with. To summarize, they decided it was silly to
continue to develop/maintain an IBM web server when Apache was already being
used by 60% of the world. The Apache license allows you to take their source,
modify it, and turn around and license the package for profit, which is what
they've done. They think of it as their mods adding value to the whole
package, making it worth people paying for.
I assume this is in addition to the customers' building pure Apache
for z/OS.
Right.
The IBM HTTP Server for z/OS (current version is 5.3) that comes with
z/OS is definitely not Apache based. Its basis is the old CERN web
server. Just look at the httpd.conf file format and you will see.
I've been told by reliable IBM sources that an IBM port of the Apache
web server is delivered with WebSphere Application Server V.6. I'd like
to know if that one can be obtained/installed without WAS but I Haven't
been able to find reliable information about that.
In any case, WAS is big enough that a little web server such as Apache
can hide within it :-)
And, of course, WAS is not only J2EE, that's only the business logic
part of WAS. For the presentation logic portion of WAS you'll need a web
server (if you want to run it on z/OS, for that matter).
--
Ulrich Boche
SVA GmbH, Germany
IBM Premier Business Partner
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