[ale] shared research server help

Pete Hardie pete.hardie at gmail.com
Wed Oct 4 21:27:08 EDT 2017


I'm sure there are more than a few of us here that remember using punch
cards

On Wed, Oct 4, 2017 at 9:12 PM, Chuck Payne <terrorpup at gmail.com> wrote:

> WOW, I guess I am old, I remember back in college, I had to schedule time
> on the mainframe, I hate that machine but I had to use for my business
> clas. If it were an Apple II or Tandy 1000, as long as lab was open, we
> could use it. Just on the Tandy, had to remember the park command when
> powering them down. DOS 2.5.
>
> I was so happy I had my little Atari ST 1040, though I should have
> seriously study C at the pick, instead of playing Phatasy 3.
>
>
> On Wed, Oct 4, 2017 at 6:48 PM, Jim Kinney <jim.kinney at gmail.com> wrote:
>
>> ulimit is a way to set soft and hard limits on resource usage including
>> RAM consumed.
>>
>> On Wed, 2017-10-04 at 17:32 -0500, Todor Fassl wrote:
>>
>> I manage a group of research servers for grad students at a university.
>> The grad students use these machines to do the research for their Ph.D
>> theses. The problem is that they pretty regularly kill off each other's
>> programs by using up all the ram. Most of the machines have 256G of ram.
>> One kid uses 200Gb and another 100Gb and one or the other, often both,
>> die. Sometimes they bringthe machines down by hogging the cpu or using
>> up all the ram. Well, the machines never crash but they might as well be
>> down.
>>
>> We really, really don't want to force them to use a scheduling system
>> like slurm. They are just learnng and they might run the same piece of
>> code 20 times in an hour.
>>
>> Is there a way to set a limit on the amount of ram all of a user's
>> processes can use? If so, we were thinking of setting it at 50% of the
>> on-board ram. Then it would take 3 students together to trash a machine.
>> It might still happen but it would be a lot more infrequent.
>>
>> Any other suggestions? Anything at all? Just keep in mind that we really
>> want to keep it easy for the students to play around.
>>
>>
>>
>>
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>>
>>
>
>
> --
> Terror PUP a.k.a
> Chuck "PUP" Payne
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-- 
Pete Hardie
--------
Better Living Through Bitmaps
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