Re: [WEB400] Multiple web instances assistance and comments

["Nathan M. Andelin" <nandelin@xxxxxxxxxxxxxxxxxxx>]

> From: "Steve McKay" <steve.mckay@southtrust.com>
> Can we run 4 separate instances (each with their own IP
> address) on the same NIC (Ethernet) and still use port 80
> for each IP address?

Yes.  OS/400 supports multiple IP addresses on a single NIC.  Each instance
of the HTTP Server can be configured to receive requests on the same port
(80) of the unique individual IP addresses.

> Or will the first instance started take control of port 80 to the
> exclusion of the other instances?

No.

> If we do separate the apps to different instances, would we see any
> performance benefit?

No.  Performance may decline just a tad.  You'd need to come up with a way
to properly route requests to the correct IP address.  What you're proposing
is probably slightly less scalable due to some extra load associated with
routing requests across multiple addresses, and the extra load of running
multiple HTTP server instances.

> We want to separate the instances so we can shut down individual apps
> without taking all of them down.

Are these CGI apps?

Nathan M. Andelin
www.relational-data.com