Auto restart long-running kernels

[Jesus Castello]

Hello,

I want to run a Jupyter notebook server for my students. My only concern is if someone runs code that takes too long to finish (or even worse, an infinite loop).

Is there a way to make a kernel auto restart after 10 seconds of running the same cell?

Alternatively, is it possible to limit each individual kernel to like 20% of total cpu usage?

Thank you!

[MinRK]

On Fri, Dec 9, 2016 at 3:09 PM, Jesus Castello <mat...@gmail.com> wrote:

Hello,

I want to run a Jupyter notebook server for my students. My only concern is if someone runs code that takes too long to finish (or even worse, an infinite loop).

Is there a way to make a kernel auto restart after 10 seconds of running the same cell?

This one would take some work, but is technically possible. Students do have access to interrupt and restart on their notebook page, so I would recommend using that, rather than doing it forcefully on their behalf.

Alternatively, is it possible to limit each individual kernel to like 20% of total cpu usage?

This can be done with cgroups, and is perhaps exposed in the most friendly way when using a service like docker or systemd to launch processes. JupyterHub 0.7 introduces exposure of these resource limits for spawners that support them (namely docker, kubernetes, systemd, but not simple local processes).

-Min

Thank you!

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