Re: [HTCondor-users] Is there a method to nice docker jobs?

[Greg Thain <gthain@xxxxxxxxxxx>]

On 04/28/2016 02:22 AM, Matthias Schnepf wrote:
> Hallo
>
> I run condor with the docker universe on our desktop cluster. User 
> should work normal on their PC and when there are free resources 
> HTCondor starts a docker container with the job. At the moment I 
> suspend jobs when the LoadAvg reach a set value, so that the user has 
> all resources on their PC when they need that. But this solution has a 
> "large" response time about 1 min.

Hello Matthias:

Currently, when condor runs a docker universe job, it gives that job a 
number of cpu "shares", which is a way that cgroups controls how much 
cpu to allocate to runnable processes.  The shares given to the job is 
100 * Cpus.  If your desktop users are running in a cpu cgroup, you 
could set their cpu shares proportionally higher, and when their 
processes are runnable, they would get proportionally more of the cpu on 
the system.

In general, though, if a batch job is cpu-bound, the default Linux 
scheduler tends to do a very good job of reducing the priority of that 
batch job below the priority of any interactive job.  It is surprisingly 
easy to have several cpu-bound jobs running on a Linux desktop, and 
never notice any latency in interactive response.

-Greg