FAQ: High Performance Community Computing Cluster

Frequently-asked questions about HPC3.

Who defined the policy?

The HPC3 subcommittee of the RCIC advisory committee crafted the initial policy. The RCIC Advisory committee approved the policy

Does this sharing cause problems with granting agencies?

We don’t believe so. The “condo” conversion factor (0.95) essentially enables an owner to turn around and spend their converted hours on their owned hardware. The 5% reductions is a rational estimate of lack of availability of hardware when accounting for software maintenance, reboots, and other downtime. Grants should purchase the hardware capacity they require. Not more.

How do I prevent my grad student from “draining my account” before I know about it?

RCIC will allow you to set up “charge limits” for any particular user. If a student hits their limit, they ask you for more, or use the free queue.

I don’t have any funds to purchase cycles or buy hardware, can I use HPC3?

Yes, if you are faculty member, you have granted cycles that are yours to use anyway you see fit for research. There is also the “free” queue, where jobs are not charged

If I purchase core-hours, is overhead charged?

We are actively working with UCI financial office to see if we can establish a rate that reduces the financial impact of overhead on recharged-cycles.

Will HPC3 allow long-running (multiday/multiweek) jobs?

Yes. It is clear that substantial community of researchers requires this feature.

How does core-hour accounting impact long-running jobs?

It really doesn’t, except that if a job is submitted requiring, say 16 core-weeks (16 cores for one week, 8 cores for two weeks)), the queueing system will not start the job unless there is enough credit to start the job (in this case, 2688 core hours)