Thanks Chris will likely need it :) John
On Sat, Oct 10, 2020 at 04:19:06PM -0700, Chris Samuel wrote: > On Tuesday, 6 October 2020 7:53:02 AM PDT Jason Simms wrote: > > > I currently don't have a MaxTime defined, because how do I know how long a > > job will take? Most jobs on my cluster require no more than 3-4 days, but > > in some cases at other campuses, I know that jobs can run for weeks. I > > suppose even setting a time limit such as 4 weeks would be overkill, but at > > least it's not infinite. I'm curious what others use as that value, and how > > you arrived at it > > My journey over the last 16 years in HPC has been one of decreasing time > limits, back in 2003 with VPAC's first Linux cluster we had no time limits, > we > then introduced a 90 day limit so we could plan quarterly maintenances (and > yes, we had users who had jobs which legitimately ran longer than that, so > they had to learn to checkpoint). At VLSCI we had 30 day limits (life > sciences, so many long running poorly scaling jobs), then when I was at > Swinburne it was a 7 day limit, and now here at NERSC we've got 2 day limits. > > It really is down to what your use cases are and how much influence you have > over your users. It's often the HPC sysadmins responsibility to try and find > that balance between good utilisation, effective use of the system and > reaching > the desired science/research/development outcomes. > > Best of luck! > Chris > -- > Chris Samuel : http://www.csamuel.org/ : Berkeley, CA, USA > > > > -- j...@sdf.org SDF Public Access UNIX System - http://sdf.org