[jira] [Updated] (YUNIKORN-2279) requiredNodePreemptor may preempt ask acquired resources through normal preemption

["Wilfred Spiegelenburg (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YUNIKORN-2279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wilfred Spiegelenburg updated YUNIKORN-2279:
--------------------------------------------
    Target Version: 1.10.0  (was: 1.9.0)

> requiredNodePreemptor may preempt ask acquired resources through normal preemption
> ----------------------------------------------------------------------------------
>
>                 Key: YUNIKORN-2279
>                 URL: https://issues.apache.org/jira/browse/YUNIKORN-2279
>             Project: Apache YuniKorn
>          Issue Type: Sub-task
>          Components: core - scheduler
>            Reporter: Manikandan R
>            Assignee: Manikandan R
>            Priority: Major
>
> A ask (preemptor) acquired resources through normal preemption process may be preempted by requiredNodePreemptor to free up spaces for daemon sets. It may happen once ask (preemptor) starts running or reserved on the node. So, whole preemption effort in making up spaces for this ask (preemptor) won't be beneficial as expected.
> Currently requiredNodePreemptor skip only daemon sets while choosing victims and can cancel any reservations made on the node to acquire resources. So, we need to differentiate the "normal" reservations from "preempted" reservations to help the requiredNode preemptor to choose the victims. In addition, node having "preempted" reservations can be skipped for normal preemption process because node already has preemptor candidate to run.



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