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Posted to issues@hive.apache.org by "Panagiotis Garefalakis (Jira)" <ji...@apache.org> on 2021/04/26 17:05:00 UTC

[jira] [Resolved] (HIVE-24914) Improve LLAP scheduling by only traversing hosts with capacity

     [ https://issues.apache.org/jira/browse/HIVE-24914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Panagiotis Garefalakis resolved HIVE-24914.
-------------------------------------------
    Resolution: Fixed

> Improve LLAP scheduling by only traversing hosts with capacity
> --------------------------------------------------------------
>
>                 Key: HIVE-24914
>                 URL: https://issues.apache.org/jira/browse/HIVE-24914
>             Project: Hive
>          Issue Type: Sub-task
>          Components: llap
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> *schedulePendingTasks* on the LlapTaskScheduler currently goes through all the pending tasks and tries to allocate them based on their Priority -- if a priority can not be scheduled completely, we bail out as lower priorities would not be able to get allocations either.
> An optimization here could be to only walk through the nodes with capacity (if any) ,and not all available hosts, for scheduling these tasks based on their priority and locality preferences.



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