Size of /dev/shm in container app job

LarsFalkPetersen-4488 0

I'm attempting to run a pytorch job in a azure container app job. Pytorch complains about the size of /dev/shm. On my workstation I can avoid this by using the hosts /dev/shm using --ipc=host like so:

docker run -it --rm --ipc=host -t <image name>

How can I modify /dev/shm in container app jobs? I've tried mounting emptydir on /dev/shm:

volumeMounts:- volumeName: shm
 mountPath: /dev/shm
volumes:
 - name: shm
storageType: EmptyDir

Any other suggestions?

VenkateshDodda-MSFT 23,691 Reputation points Microsoft Employee

2025-01-27T05:19:19.79+00:00

@LarsFalkPetersen-4488 Thanks for posting your question in Microsoft Q&A, apologize for any inconvenience caused on this.

Based on the shared information, I understand that you to want to mention the size mounted volume of your container app job which uses EmptyDir storage type.

If my understanding is correct, it looks like you are trying to use Replica-scope storage in your container apps job which interim use EmptyDir storage type which is similar to kubernetes.

By default, emptyDir volumes are stored on whatever medium that backs the node such as disk, SSD, or network storage, depending on your environment.

A size limit can be specified for the default medium, which limits the capacity of the emptyDir volume. The storage is allocated from node ephemeral storage.

Go through this official documentation of Kubernetes to know more about EmptyDir storage type.

Refer to this sample mentioned in Kubernetes documentation on how to configure volume size and medium in EmptyDir.

Hope this helps, let me know if you have any further questions on this.

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