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From "Konstantinos Karanasos (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5646) Documentation for scheduling of OPPORTUNISTIC containers
Date Wed, 07 Dec 2016 23:46:59 GMT

    [ https://issues.apache.org/jira/browse/YARN-5646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15730332#comment-15730332

Konstantinos Karanasos commented on YARN-5646:

Thanks for the detailed feedback, [~templedf]!
I also got some offline feedback from [~curino] yesterday. 

I will incorporate your changes and upload a new version.

Regarding the min queue length and wait time, I will improve the description -- it is indeed
not easy to understand what it does in its current form. These parameters are used to "not
dequeue containers for load rebalancing purposes, if queue length is smaller than X tasks
(or seconds)". So if you have shorter queues than that, you simply don't perform any action.

As per Carlo's suggestion too, I will raise a JIRA to simplify some of the properties related
to opportunistic containers, including the incremental one. For instance, I don't think there
will be many cases where we will want the min/max opportunistic container size to be different
from the guaranteed one.

> Documentation for scheduling of OPPORTUNISTIC containers
> --------------------------------------------------------
>                 Key: YARN-5646
>                 URL: https://issues.apache.org/jira/browse/YARN-5646
>             Project: Hadoop YARN
>          Issue Type: Task
>            Reporter: Konstantinos Karanasos
>            Assignee: Konstantinos Karanasos
>            Priority: Blocker
>         Attachments: YARN-5646.001.patch
> This is for adding documentation regarding the scheduling of OPPORTUNISTIC containers.
> It includes both the centralized (YARN-5220) and the distributed (YARN-2877) scheduling.

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