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Posted to dev@yunikorn.apache.org by "Wilfred Spiegelenburg (Jira)" <ji...@apache.org> on 2023/02/06 01:35:00 UTC

[jira] [Created] (YUNIKORN-1559) rethink QOS BestEffort pod scheduling

Wilfred Spiegelenburg created YUNIKORN-1559:
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             Summary: rethink QOS BestEffort pod scheduling
                 Key: YUNIKORN-1559
                 URL: https://issues.apache.org/jira/browse/YUNIKORN-1559
             Project: Apache YuniKorn
          Issue Type: Improvement
          Components: core - scheduler, shim - kubernetes
            Reporter: Wilfred Spiegelenburg


The best effort pods on K8s do not request resources. The default scheduler will just dump them on a node and hope for the best.

In YuniKorn we need resources to schedule a pod. We reject a pod without a request set. As a default we assign 1M memory to the pod to make sure it gets scheduled. 1 byte would be better, need to rethink how we do this.

This also affects other BestEffort pod resource calculations
 * init containers
 * pod overhead 



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