Thanks Rich. I'm in the process of load testing several applications using
both scenarios. Trying to find optimum memory configurations
and learning what to do and not do. I have found that when using multiple
servers on a single instance, it's a good idea to not start all servers
at once and walk away. It seems to take all available memory on the
machine and start shutting down servers once it hits the wall.
Thanks again.
Rich Smrcina
<[EMAIL PROTECTED] To: [EMAIL PROTECTED]
om> cc:
Sent by: Linux on Subject: Re: websphere on zlinux?
390 Port
<[EMAIL PROTECTED]
IST.EDU>
09/02/2003 08:22
AM
Please respond to
Linux on 390 Port
We've gone both ways and there are plusses and minuses. Keeping each
production application in it's own WAS application server (in a single
Linux
instance) has the benefit of isolating applications such that a coding
error
or runaway query in one application only crashes the application server
that
it runs in. The java heap size for each application can also be more
granularly fine tuned.
On the other hand, using additional application servers has the drawback of
a
larger memory footprint.
I was recently involved in a situation where we broke apart applications
into
separate application servers. I don't know that it performed any better,
but it sure provided better stability. We've also heard from WAS support
that additional application servers for production applications is the
suggested way to go.
Test systems shouldn't need this level of care, depending upon how
carefully
you wish to mimick production.
I hope this helps.
On Tuesday 02 September 2003 07:43 am, you wrote:
> Rich,
>
> Do you typically 'stack' applications on a single default server on
> WebSphere or do you create multiple servers a a single virtual machine?
If
> both, which performs the best for you?
>
> Thanks.
>
>
>
>
> Rich Smrcina
> <[EMAIL PROTECTED] To:
> [EMAIL PROTECTED] om> cc:
> Sent by: Linux on Subject: Re: websphere on
> zlinux? 390 Port
> <[EMAIL PROTECTED]
> IST.EDU>
>
>
> 08/29/2003 08:57
> AM
> Please respond to
> Linux on 390 Port
>
>
>
>
>
>
> I've been involved in some very successful implementations of WebSphere
on
> Linux for zSeries. One is for a company that uses it for their external
> web
> site and another is for an internal application used for order entry.
>
> The order entry app gets over 700,000 hits a day from 50-60 order takers.
> It
> runs on a z800 IFL and most of the time uses less than 10% of the
> processor.
>
> As with anything, your mileage may vary, but if there is an existing
> application it is better to measure it over time to make sure it is a
good
> fit. If it is under development, it can be stress tested with a load
> generator and then measured to see what the CPU load will be like.
>
> On Friday 29 August 2003 08:31 am, you wrote:
> > Does anyone have any experience using was on zlinux? Any comparisons
>
> with
>
> > other platforms? Any gotcha's to watch for?
> >
> > thx
> > --------------------------------------------------------------------
> > Lionel B. Dyck, Systems Software Lead
> > Kaiser Permanente Information Technology
> > 25 N. Via Monte Ave
> > Walnut Creek, Ca 94598
> >
> > Phone: (925) 926-5332 (tie line 8/473-5332)
> > E-Mail: [EMAIL PROTECTED]
> > Sametime: (use Lotus Notes address)
> > AIM: lbdyck
--
Rich Smrcina
Sr. Systems Engineer
Sytek Services, A Division of DSG
Milwaukee, WI
rsmrcina at wi.rr.com
rsmrcina at dsgroup.com
Catch the WAVV! Stay for Requirements and the Free for All!
Update your S/390 skills in 4 days for a very reasonable price.
WAVV 2004 in Chattanooga, TN
April 30-May 4, 2004
For details see http://www.wavv.org
