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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2882) Add ExecutionType to denote if a container execution is GUARANTEED or QUEUEABLE
Date Tue, 15 Dec 2015 10:32:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15057815#comment-15057815
] 

Arun Suresh commented on YARN-2882:
-----------------------------------

Glad you could chime in [~kasha].

bq. Do the opportunistic containers in YARN-1011 and here share characteristics enough to
be the same? ..
Although the QUEUEABLE containers will be allocated opportunistically, its naming has more
to do with the fact that it will be queued at some NM. Given the fact that the latest patch
introduces a new enum type (ExecutionType), instead extending the ContianerType, my vote is
to probably add SPECULATIVE / OPPERTUNISTIC as a new ExecutionType for YARN-1011 in addition
to QUEUEABLE to signal different mechanisms for handling the type of Request Ask.

bq. To set the cgroups and OOM priorities, we need the type in container initialization context...
Agreed.. But given that this patch is addressing mostly API changes, I'd prefer adding it
in a subsequent patch when required.

bq. We are considering developing YARN-1011 also on a branch. Any ideas on how we can share
code?
I like the Idea of pushing this to trunk, if we are limiting this to addition of the ExecutionType

> Add ExecutionType to denote if a container execution is GUARANTEED or QUEUEABLE
> -------------------------------------------------------------------------------
>
>                 Key: YARN-2882
>                 URL: https://issues.apache.org/jira/browse/YARN-2882
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Konstantinos Karanasos
>            Assignee: Konstantinos Karanasos
>         Attachments: YARN-2882-yarn-2877.001.patch, YARN-2882-yarn-2877.002.patch, yarn-2882.patch
>
>
> This JIRA introduces the notion of container types.
> We propose two initial types of containers: guaranteed-start and queueable containers.
> Guaranteed-start are the existing containers, which are allocated by the central RM and
are instantaneously started, once allocated.
> Queueable is a new type of container, which allows containers to be queued in the NM,
thus their execution may be arbitrarily delayed.



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