Workload management (WLM)
Workload management optimizes the distribution of incoming work
requests to the application servers, enterprise beans, servlets, and other
objects that can most effectively process the requests. Workload management
also provides failover when servers are not available, improving application
availability.
WebSphere for z/OS requires that z/OS run workload management in goal
mode. If your system runs in compatibility mode, you must implement goal mode.
For details on workload management, see z/OS MVS Planning: Workload
Management, which is available on the z/OS Internet Library Web site
. You might also find z/OS
MVS Programming: Workload Management Services helpful.
In addition to setting up workload management in goal mode, you need to
define workload management policies for your application servers.
Note: To get started, you do not need to define special classification
rules and work qualifiers, but you might want to do this for
your production system.
Workload management provides the following benefits to WebSphere Application
Server applications:
- It balances server workloads, allowing processing tasks to be distributed
according to the capacities of the different machines in the sysplex.
- It provides failover capability by redirecting client requests if one
or more servers is unable to process them. This improves the availability
of applications and administrative services.
- It enables systems to be scaled up to serve a higher client load than
provided by the basic configuration. With clustering, additional instances
of servers, servlets, and other objects can easily be added to the configuration.
- It enables servers to be transparently maintained and upgraded while
applications remain available for users.
- It centralizes the administration of servers and other objects.
In the WebSphere Application Server environment, you implement workload
management by using clusters, transports, and replication domains.

Techniques for managing state
Sysplex routing of work requests
Address space management for work requests
Multiple servant regions

Balancing workloads with clusters
Configuring an application server to use the WLM even distribution of HTTP requests function![[Version 5.0.2 and later]](../../v502x.gif)

Example of classification rules
Searchable topic ID:
crunwlmzos
Last updated: Jun 21, 2007 9:56:50 PM CDT
WebSphere Application Server for z/OS, Version 5.0.2
http://publib.boulder.ibm.com/infocenter/wasinfo/index.jsp?topic=/com.ibm.websphere.zseries.doc/info/zseries/ae/crun_wlmzos.html