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KEP-2170: Add validation to Torch numProcPerNode field #2409

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merged 1 commit into from
Feb 14, 2025

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astefanutti
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What this PR does / why we need it:

Change the TorchMLPolicy numProcPerNode type to intstr.IntOrString and add CRD validation.

Checklist:

  • Docs included if any changes are user facing

@@ -194,7 +195,7 @@ type Trainer struct {
// Number of processes/workers/slots on every training node.
// For the Torch runtime: `auto`, `cpu`, `gpu`, or int value can be set.
// For the MPI runtime only int value can be set.
NumProcPerNode *string `json:"numProcPerNode,omitempty"`
NumProcPerNode *intstr.IntOrString `json:"numProcPerNode,omitempty"`
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I am also thinking about changing numProcPerNode to IntOrString. However, it is not a standard type in Python.
Thus, users should know what does this type mean: K8sIoApimachineryPkgUtilIntstrIntOrString.
Or we need to make numProcPerNode: Union[int,str] type.

Do we have any plans to expose numProcPerNode parameters to the Trainer object in SDK: https://github.com/kubeflow/trainer/blob/master/sdk/kubeflow/trainer/types/types.py#L73?

Or it will be always auto-populated based on num_nodes and resources_per_node ?

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cc @kubeflow/wg-training-leads @Electronic-Waste

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Yes, I also think there should be a parameter exposed in the SDK. It is only loosely coupled with resources_per_node.

The Kubernetes Python client declares IntOrString fields as object, but Union[int,str] would be better.

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For me, I prefer Union[int, str]. And exposing num_proc_per_node is better.

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Let's continue discussion here: #2313 (comment)

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As we discussed above PR, I fully agree with introducing this IntOrString typed.

@astefanutti astefanutti force-pushed the pr-num-proc branch 2 times, most recently from 905fbe7 to 34b00e8 Compare February 14, 2025 19:03
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Mostly lgtm, thank you!

After the @akshaychitneni PR is merged, I think we can merge this.
@andreyvelich Any thoughts?

pkg/runtime/core/trainingruntime_test.go Outdated Show resolved Hide resolved
pkg/runtime/framework/plugins/torch/torch.go Outdated Show resolved Hide resolved
@astefanutti astefanutti force-pushed the pr-num-proc branch 2 times, most recently from 08f63b7 to 492a90e Compare February 14, 2025 19:11
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I think we can merge this once the conflicts are resolved

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Thank you!
/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tenzen-y

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@google-oss-prow google-oss-prow bot merged commit ea42d11 into kubeflow:master Feb 14, 2025
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4 participants