WAS-ND 6.1 horizontal & vertical clusters

[Igaduma]

Hi All,

I've got 2 environments with WAS-ND.
Environment 1 is a single machine, with several Application Engines in vertical cluster configuration (unique http ports, etc).
When I connect to two individual application servers in the cluster I can get to the application:

http://server1:9080/application

http://server1:9081/application

When I'm connected to

http://server1:9080/application

and shutdown that application server, my browser continues to serve the application without me getting a glitch, very nice.
In effect it's serving it from 9081 but that is transparent to the browser, which is still using 9080. So Far So Good!
I don't see any dedicated cluster processes started so I presume it's the nodeagents that take care of this.

When using the same cluster setup on 2 machines, ie: 2 application servers on different machines or a horizontal cluster I can get to the application by using:

http://server1:9080/application

http://server2:9080/application

But, If I now connect to

http://server1:9080/application

and shut down that applications server I don't get the same behaviour like when the cluster was vertically on 1 machine with 2 application servers & different ports.
When using this vertical cluster my browser just timeouts and I can't get to the application unless I change the url to

http://server2:9080/application.

What do I need to do/add to have this failover functionality on a horizontal cluster spread over 2 physical machines ?
I presumed WAS took care of the details in the background like on a single, vertical cluster machine but apparently I'm missing something.

Any help is appriciated
Thanks,
Iga

 

[chgwhat]

If you have a horizontal cluster, you have to manage the plugin-cfg.xml manually, see.

http://www-01.ibm.com/support/docview.wss?rs=180&uid=swg21219567

if this is on one server the websphere config does this for you, when on multiple servers you have to maintain accordingly.

Tony ... aka chgwhat

When in doubt,,, Power out...

 

[Igaduma]

Hi chgwhat,

This is when using the IHS webserver.
But, on the first, vertical scaled cluster server I did not use the webserver, just the application servers & a cluster config, nothing more.
Furthermore, each time I create an IHS server it does start up (ps axe) but dmgr cannot see / control it...so I'm stuck there

Thanks for the insight!
Iga

 

[chgwhat]

I believe for horizontal you need IHS and dmgr does not control it, but it will update the plugin-cfg.xml, and the IHS module provides the load balancing / failover. I am currently not working with websphere but that is how we had it setup.


Tony ... aka chgwhat

When in doubt,,, Power out...