This section explains how you can add dynamic scheduling
capabilities to your environment to schedule both existing Tivoli Workload Scheduler jobs
and job types with advanced options,
both those supplied with the product and the additional types implemented
through the custom plug-ins.
Dynamic capabilities help you maintain business policies and ensure
service level agreements by:
- Automatically discovering scheduling environment resources
- Matching job requirements to available resources
- Controlling and optimizing use of resources
- Automatically following resource changes
- Requesting additional resources when needed
You can add dynamic capabilities to your environment by defining
a set of workstation types:
- Dynamic agent
- A workstation that manages a wide variety of
job types, for example, specific database or FTP jobs, in addition
to existing job types. This workstation is automatically defined and
registered in the Tivoli Workload Scheduler database
when you install the dynamic agent.
You can group dynamic agents in
pools and dynamic pools.
- Pool
- A
workstation that groups a set of dynamic agents with
similar hardware or software characteristics to submit jobs to. Tivoli Workload Scheduler balances
the jobs among the dynamic agents within
the pool and automatically reassigns jobs to available dynamic agents if
a dynamic agent is
no longer available. To create a pool of dynamic agents in
your Tivoli Workload Scheduler environment,
define a workstation of type pool hosted by the dynamic workload broker workstation,
then select the dynamic agents you
want to add to the pool. You can define the pool using the Dynamic Workload Console or
the composer command.
- Dynamic pool
- A
workstation that groups a set of dynamic agents,
which is dynamically defined based on the resource requirements you
specify and hosted by the dynamic workload broker workstation.
For example, if you require a workstation with low CPU usage and Windows
installed to run your job, you specify these requirements using the Dynamic Workload Console or
the composer command. When you save the set of requirements,
a new workstation is automatically created in the Tivoli Workload Scheduler database.
This workstation is hosted by the dynamic workload broker workstation.
This workstation maps all the dynamic agents in
your environment that meet the requirements you specified. The resulting
pool is dynamically updated whenever a new suitable dynamic agent becomes
available. Jobs run on the first workstation in the dynamic pool which
marches all the requirements. Jobs scheduled on this workstation automatically
inherit the requirements defined for the workstation.
For information
on how to create pools and dynamic pools using the Dynamic Workload Console,
see the section on creating a pool of agents in the Tivoli® Dynamic Workload Console User's Guide.
For more information on how to create pools and dynamic pools using
the composer command, see the User's Guide and Reference, SC32-1274.
The dynamic agents,
pools, and dynamic pools leverage the dynamic functionality built
into Tivoli Workload Scheduler and
provide the possibility at run time to dynamically associate your
submitted workload (or part of it) to the best available resources.
You can add dynamic scheduling capabilities to workstations at installation
time. For more information on installing the dynamic agents,
see the section on installing a new agent in the Planning and Installation Guide, SC32-1273.
You can use dynamic agents,
pools and dynamic pools to schedule job types with advanced options.
The job types with advanced options include
both those supplied with the product and the additional types implemented
through the custom plug-ins. Both job types run only on dynamic agents,
pools, and dynamic pools. For more information on how to schedule job types with advanced options,
see Creating job types with advanced options. For more information on
how to create custom plug-ins, see Extending Tivoli Workload Automation, SC14-7623.
You can also use dynamic agents,
pools, and dynamic pools to run the jobs you created for the existing Tivoli Workload Scheduler workstation
types. To run these jobs on the dynamic workstation types, you only
have to change the specification of the workstation where you want
the job to run. For more information on how to schedule existing Tivoli Workload Scheduler jobs,
see Adding dynamic capabilities to existing Tivoli Workload Scheduler jobs.
If you want to leverage the dynamic capability when scheduling job types with advanced options,
you schedule them on pools and dynamic pools, which assign dynamically
the job to the best available resource. If you are interested only
in defining job types with advanced options,
without using the dynamic scheduling capability, you schedule these
jobs on a specific dynamic agent,
on which the job runs statically.
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