HP File System Extender (FSE) manual Resource allocation threshold ResourceAllocationThreshold

Maximum number of drives for recall (SystemMaxNumDrivesRecall)

Definition	Maximum number of drives that can be used for recall by all FSE partitions.
Impact	The purpose of this parameter is to prevent recall jobs from using all drives in the FSE
	implementation. By limiting drives for recall, you ensure that drives remain available for
	other jobs (migration, administrative, recovery…). You should carefully balance resources
	according to your environment.

Maximum number of drives for administrative jobs (SystemMaxNumDrivesAdmin)

Definition	Maximum number of drives that can be used for administrative jobs.
Impact	The purpose of this parameter is to prevent administrative jobs from using all drives in the
	FSE implementation. By limiting drives for administration, you ensure that drives remain
	available for other jobs (migration, recall, recovery…). You should carefully balance
	resources according to your environment.

Maximum number of drives for recovery (SystemMaxDrivesRecovery)

Definition	Maximum number of drives that can be used for recovery.
Impact	The purpose of this parameter is to prevent recovery jobs from using all drives in the FSE
	implementation. By limiting drives for recovery, you ensure that drives remain available
	for other jobs (migration, recall, administrative…).

Resource allocation threshold (ResourceAllocationThreshold)

Definition	When the Resource Manager tries to assign free resources, it will only consider jobs
	whose priority is not above the specified threshold of the first job in the queue (a job with
	top priority). When allocating resources, the Resource Manager takes into account only
	those jobs whose priority is no less than ResourceAllocationThreshold % lower
	than the top priority in the queue.
Impact	The purpose of this parameter is to consider only those queued allocation requests that
	have a higher priority than a percentage of the priority of the job with highest priority.
	This ensures some fairness to jobs with higher priorities that need many resources and
	cannot get all of them at once.
	For example, if the resource allocation threshold value is 90% and the highest priority is
	5000, all jobs with priority higher than 4500 (90% of 5000) will be checked. If you
	specify 0%, all jobs in queue will be considered for allocation. If you specify 100%, only
	the first job in the queue will be considered for allocation.

Time step (TimeStep)

Definition	System-wide factor by which the priority of the queued jobs is increased due to the age of
	the job.
Impact	The purpose of this parameter is to leverage the elapsed time (the time since the job was
	started) and increase the priority of jobs that are waiting in the queue. The time factor is
	multiplied by the number of seconds since the job started, and by the
	JobTypePriority divided by 100. Note that if you set a value to 0 the job priorities
	will not get their priorities increased due to the age factor.

For example, if the time-factor value is set to 10 and the job (Recall, RecallPriority

=80) has been waiting in the queue for 60 minutes, its priority will be increased by 28800 (10 * 60 min * 60 * 80/100). This will ensure that this job will have a higher priority than any new jobs added to the queue.

HP StorageWorks File System Extender Software user guide 143