Worker Server GRs

Worker Server GRs contain a series of rules that control which work is permitted to run on which servers.

Worker Server GRs are defined in these terms:

Position: Has no effect in a worker server GR (Position is used by Authentication GRs only)
Server ID: Indicates which server this rule applies to.; The Server ID can be retrieved from Systems Manager/Servers panel by stripping :WORKER suffix
Delay Seconds: Time in seconds that a server will wait before picking up available work
Exclude: Prevents this server from executing work
Ignore: Ignore this rule (used to 'comment out' rules)

Worker Server Algorithm

Each Netcool Configuration Manager worker server builds a cache of what worker servers can execute against each realm. This is calculated every 30 seconds by default, but can be changed in rseries.properties (Core/workerServerUpdatePeriod=30). It is not recommended setting the workerServerUpdatePeriod to less than 30 seconds. If a new worker server is added to a realm it may be up to 30 seconds before it becomes active.

When the Netcool Configuration Manager worker server grabs a task it firstly checks if it exists in the worker server cache for the realm that the device belongs to. If it does, it then checks which of these worker server GR's VTMOS is a match for the device. The process does not attempt to identify the best VTMOS match; every GR is either a match or is not, and all that are a match are equally valid. The process then inspects the worker server rules defined in the matching GRs that relate to the executing worker server based on the Server ID.

If the executing worker server has been 'excluded', then the task will not be executed by this worker.
If the executing worker server has been included, then once the appropriate delay (which could also be zero) has elapsed, the work is executed.

Note: If there are more than one worker server in the deployment and more than one worker is applicable to pick up the work then its the first worker to pick up the work that executes it even if the worker is in a parent realm in the hierarchy. There is no preference given to worker server in the same realm as the device.