[jira] [Commented] (TEZ-3168) Provide a more predictable approach for total resource guidance for wave/split calculation

["Hitesh Shah (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-3168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15198088#comment-15198088 ] 

Hitesh Shah commented on TEZ-3168:
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[~vinodkv] [~jianhe] Mind taking a look at this patch to see whether we are using the APIs for queue and cluster resources correctly. Also, if we are accidentally using any private APIs, let us know. 

> Provide a more predictable approach for total resource guidance for wave/split calculation 
> -------------------------------------------------------------------------------------------
>
>                 Key: TEZ-3168
>                 URL: https://issues.apache.org/jira/browse/TEZ-3168
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Hitesh Shah
>            Assignee: Hitesh Shah
>         Attachments: TEZ-3168.wip.patch
>
>
> Currently, Tez uses headroom for checking total available resources. This is flaky as it ends up causing the split count to be determined by a point in time lookup at what is available in the cluster. A better approach would be either the queue size or even cluster size to get a more predictable count. 



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