PHYSGI03 Operating Rules

At the Monday PHYSGI scheduling meeting, May 1, there was discussion of the rules under which PHYSGI03 is operated. For the time being the previous rules, as stated below, were reaffirmed. It should be pointed out that in cases where groups violate these rules the management reserves the right to adjust the priority of or terminate processes. There was discussion about changing the rules to simply require that all production job run at reduced priority. This would be a more easily enforced rule but might be considered to favor groups running a large number of jobs relative to groups running a single or a small number of jobs. I would like to hear comments from groups not represented at Mondays meeting on this subject. I'm also happy to hear additional comments from those groups which did attend.

- Bruce Gibbard -

Current Operating Rules

• All experiments which anticipate running more than a single occasional production job during a given week should attend the scheduling meeting. If that is not possible they should notify Bruce Gibbard (gibbard@bnl.gov) and Tom Throwe (throwe@rsgi02.rhic.bnl.gov) of their needs by Email prior to the Monday 11:30 meeting.
• A production process is defined as a process which would accrue an hour or more of CPU time in 8 hours of uncontended running.
• Each experiment is currently allowed to run up to 6 concurrent "production" processes. Only one of these 6 processes may be run at full priority, (100).
• All "production" processes beyond the first are to be niced to 2 (102). This allows for the possibility of assigning medium priority jobs, niced to 1 (101), at some point in the future.
• Extended use of a tape drive is defined as use which extends for more than 1 hour.
• In the presences of demand by other experiments for tape drives, no experiment should make extended use of more than 2 tape drives.
• The tape stackers represent a relatively scarce resource. It is hoped that negotiation between users will result in mutually acceptable sharing. If users find that not to be the case, rules will be established to guarantee sharing which is as equitable as possible, consistent with the overall mission of the PHYSGI computing system.

(updated on May 9, 1995)