"Deep Background" applications

[George Seibel]

In article <29500025 at urbsdc> aglew at urbsdc.Urbana.Gould.COM writes:
]
][buncha stuff about Gould RT unix]
]
]Finally, may I say that Real Time UNIX features are useful for 
]more than Real Time applications? For example, fixed priority
]scheduling - there have been many times that I wanted to have
]a "deep background" application, that would run only when the
]system is otherwise idle. No matter how much you nice, your
]process will still take some cycles away when the system isn't
]idle.

Boy, would that be nice.  We have a job mix that includes a healthy
fraction of multi-day cpu burners.  We'd really like a way to make
those jobs butt out when someone wants to run a short (10 min-1 hr)
job.   Does anyone know of an easy way to do something like this on
a bsd 4.[2-3] system?

George Seibel, UCSF
seibel at cgl.ucsf.edu