Install a stand-alone IBM® WebSphere® proxy server for
use with a cluster of IBM Sametime® servers.
Before you begin
This topic explains how to install a stand-alone WebSphere proxy server by
installing an extra node into the Sametime cluster, disabling
the Sametime application
server, and then configuring the WebSphere proxy
server that remains. If you just want to configure the WebSphere proxy server that was automatically
installed with WebSphere Application
Server on one of existing nodes in your Sametime cluster, skip this
task and proceed directly to Configuring a WebSphere proxy server.
Attention: To upgrade a stand-alone WebSphere proxy server that
was installed using this process, you must run a newer Sametime installation
for the original Sametime component. Because the Sametime application
was removed during the initial installation of the stand-alone proxy
server, it cannot be found during the upgrade, and the upgrade fails.
To work around this issue you will need to temporarily recreate the
Sametime application in the WebSphere Integrated Solution Console
and assign it to the node being upgraded. After the upgrade successfully
completes, you can remove the Sametime application. For detailed steps
on resolving this upgrade issue, see the IBM TechNote
Issue while upgrading a stand-alone WebSphere proxy
server using the Sametime installation program.
About this task
A cluster of Sametime servers
requires at least one WebSphere proxy
server to handle routing and caching tasks. When you install Sametime on a node in the
cluster, WebSphere Application
Server and WebSphere proxy
server are also installed. The WebSphere proxy
server merely needs to be configured for use.
To reduce the
resource load on product nodes and avoid port conflicts, you may choose
to install a stand-alone WebSphere proxy
server on a separate computer instead of using the instance that was
installed on a
Sametime node.
Or, you may configure the instance on the
Sametime node and then install
an additional instance on a separate computer, and use a load balancer
to share the load between them.
Note: If you previously installed a WebSphere proxy server on
one of the Sametime nodes
in the cluster and are now seeing excessive CPU usage on that node,
you should install and configure an additional proxy server now.
To
install a stand-alone WebSphere proxy
server, you will install an extra Sametime node using the
"Secondary Node" option. You will then disable the Sametime application server
from the new node while leaving WebSphere proxy
server intact. Finally, you will configure the WebSphere proxy server for use with the
cluster.