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https://issues.apache.org/jira/browse/MAPREDUCE-4393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413294#comment-13413294
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Kihwal Lee commented on MAPREDUCE-4393:
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I think use of ZK is fine since it won't be pretty for routers to poll status
from RM (to get the list of AMs) and AM (to get updates on app instances).
Multiple AMs can run on the same node, so a predefined port number cannot be
used. Then there has to be a way to discover the port number. Having ZK in the
picture certainly helps.
But depending on the requirement on router, all external dependencies (router &
zk) can be substituted with another YARN app! PaaS System App? If we do this,
the PaaS app can be made to talk to any one of the two types of management
system.
> PaaS on YARN: an YARN application to demonstrate that YARN can be used as a
> PaaS
> --------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4393
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4393
> Project: Hadoop Map/Reduce
> Issue Type: Task
> Components: examples
> Affects Versions: 0.23.1
> Reporter: Jaigak Song
> Assignee: Jaigak Song
> Fix For: 3.0.0
>
> Attachments: HADOOPasPAAS_Architecture.pdf, MAPREDUCE-4393.patch,
> MAPREDUCE-4393.patch, MAPREDUCE-4393.patch, MAPREDUCE4393.patch,
> MAPREDUCE4393.patch
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> This application is to demonstrate that YARN can be used for non-mapreduce
> applications. As Hadoop has already been adopted and deployed widely and its
> deployment in future will be highly increased, we thought that it's a good
> potential to be used as PaaS.
> I have implemented a proof of concept to demonstrate that YARN can be used as
> a PaaS (Platform as a Service). I have done a gap analysis against VMware's
> Cloud Foundry and tried to achieve as many PaaS functionalities as possible
> on YARN.
> I'd like to check in this POC as a YARN example application.
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