CPU Allocation

Condo CPU Allocation, Disk Quota Allocation and Contribution Policies

Starting May 1, 2015

 

CPU Allocation Policy

PI groups who have purchased computing resources have a percentage share of the machine based on computing assets purchased by that group for use by all members of the machine.

This percentage will be used in allocating CPU resources on themachine.

A monthly CPU allocation will be 100% of the CPU cycles available in one month. Each group's monthly allocation is their percentage of the total monthly allocation based on the percentage as described above.

At the beginning each PI group will be given a 3 month's worth of their monthly allocations, thus allowing to borrow cycles from the next two months' allocations.

Each night new balances will be computed based on usage so far, which can be seen by any member of the group using slurm-get-current-balance.py command. To see usage by user or group, use slurm-usage.py command. Monthly usage reports are available at /work/<your_group_working_dir>/ClusterUsage .

At the beginning of every month, any unused cycles from the previous month will be subtracted from each group's allocation proportionately according to their percentage of the machine. Thus unused cycles will not be moved to the next month.

After the unused cycles from the previous month are subtracted, then one month's group allocation will be added for each group. Thus at the beginning of every month group will have a 3 month's worth of their monthly allocations with the subtraction of the cycles that have been borrowed during the previous two months if any.

 

Storage Quota Allocation Policy

Quota on the NFS servers will be determined by the space purchased exclusively for that group's use.