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https://issues.apache.org/jira/browse/YARN-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wangda Tan updated YARN-5139:
-----------------------------
Description:
Existing YARN scheduler is based on node heartbeat. This can lead to
sub-optimal decisions because scheduler can only look at one node at the time
when scheduling resources.
Pseudo code of existing scheduling logic looks like:
{code}
for node in allNodes:
Go to parentQueue
Go to leafQueue
for application in leafQueue.applications:
for resource-request in application.resource-requests
try to schedule on node
{code}
Considering future complex resource placement requirements, such as node
constraints (give me "a && b || c") or anti-affinity (do not allocate HBase
regionsevers and Storm workers on the same host), we may need to consider
moving YARN scheduler towards global scheduling.
{color:red}Running design doc:
https://docs.google.com/document/d/1rY-CJPLbGk3Xj_8sxre61y2YkHJFK8oqKOshro1ZY3A/edit#heading=h.xnzvh9nn283a{color}
was:
Existing YARN scheduler is based on node heartbeat. This can lead to
sub-optimal decisions because scheduler can only look at one node at the time
when scheduling resources.
Pseudo code of existing scheduling logic looks like:
{code}
for node in allNodes:
Go to parentQueue
Go to leafQueue
for application in leafQueue.applications:
for resource-request in application.resource-requests
try to schedule on node
{code}
Considering future complex resource placement requirements, such as node
constraints (give me "a && b || c") or anti-affinity (do not allocate HBase
regionsevers and Storm workers on the same host), we may need to consider
moving YARN scheduler towards global scheduling.
> [Umbrella] Move YARN scheduler towards global scheduler
> -------------------------------------------------------
>
> Key: YARN-5139
> URL: https://issues.apache.org/jira/browse/YARN-5139
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Attachments: Explanantions of Global Scheduling (YARN-5139)
> Implementation.pdf, YARN-5139-Concurrent-scheduling-performance-report.pdf,
> YARN-5139-Global-Schedulingd-esign-and-implementation-notes-v2.pdf,
> YARN-5139-Global-Schedulingd-esign-and-implementation-notes.pdf,
> YARN-5139.000.patch, wip-1.YARN-5139.patch, wip-2.YARN-5139.patch,
> wip-3.YARN-5139.patch, wip-4.YARN-5139.patch, wip-5.YARN-5139.patch
>
>
> Existing YARN scheduler is based on node heartbeat. This can lead to
> sub-optimal decisions because scheduler can only look at one node at the time
> when scheduling resources.
> Pseudo code of existing scheduling logic looks like:
> {code}
> for node in allNodes:
> Go to parentQueue
> Go to leafQueue
> for application in leafQueue.applications:
> for resource-request in application.resource-requests
> try to schedule on node
> {code}
> Considering future complex resource placement requirements, such as node
> constraints (give me "a && b || c") or anti-affinity (do not allocate HBase
> regionsevers and Storm workers on the same host), we may need to consider
> moving YARN scheduler towards global scheduling.
> {color:red}Running design doc:
> https://docs.google.com/document/d/1rY-CJPLbGk3Xj_8sxre61y2YkHJFK8oqKOshro1ZY3A/edit#heading=h.xnzvh9nn283a{color}
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