Account Resource Limits

The following tables outline the usage limits for specific account types.

Linux Computing Resource

Time on the Linux Computing Resource will be allocated in Node Wall Clock Hours (NWCH). The use of 10 nodes for 3 hours is counted as 30 NWCH.

Linux Allocation	Maximum NWCH (per year)	Application/Allocation Process
Small	200	Processed within two weeks
Large	No limit*	Proposal reviewed by Allocation Committee

Sun Computing Resource

Time on the SUN Computing Resource will be allocated in CPU Hours (CPUH). One hour of CPU time on four processors is counted as four CPUH. Each Sun Computing Resource user is limited to one job in execution. However, each use may have an unlimited number of jobs in the queue awaiting execution. Once the active job completes, the system will automatically start executing the next job in the queue.

Sun Allocation	Maximum CPU Time (per year)	Application/Allocation Process
Small	200	Processed within two weeks
Large	No limit*	Proposal reviewed by Allocation Committee

*Although there is no limit to the allocation that can be requested, all proposals must include a specific limit for each resource. Allocations also may be reduced to match the available resources.

Scheduling Strategy

In general, jobs will be run (or be scheduled) on a first-come, first-served basis within a queue, provided that adequate resources are available. To maximize the use of computing resources, HPCC management (in consultation with the HPCC allocation committee) may restrict the number of jobs concurrently executed within a given account (Linux Computing Resource only).