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Subject: Re: [OMPI users] busy waiting and oversubscriptions
From: Reuti (reuti_at_[hidden])
Date: 2014-03-27 11:46:51


Am 27.03.2014 um 16:31 schrieb Gus Correa:

> On 03/27/2014 05:05 AM, Andreas Schäfer wrote:
>>> >Queue systems won't allow resources to be oversubscribed.
>> I'm fairly confident that you can configure Slurm to oversubscribe
>> nodes: just specify more cores for a node than are actually present.
>>
>
> That is true.
> If you lie to the queue system about your resources,
> it will believe you and oversubscribe.
> Torque has this same feature.
> I don't know about SGE.

It's possible too.

-- Reuti

> You may choose to set some or all nodes with more cores than they actually have, if that is a good choice for the codes you run.
> However, for our applications oversubscribing is bad, hence my mindset.
>
> Gus Correa
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