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https://issues.apache.org/jira/browse/YARN-7736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16321860#comment-16321860
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Akira Ajisaka commented on YARN-7736:
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{noformat}
*Role of AMRMProxy*
1. Protect the sub-cluster YARN RMs from misbehaving AMs. The AMRMProxy can
prevent DDOS attacks by throttling/killing AMs that are asking too many
resources.
2. Mask the multiple YARN RMs in the cluster, and can transparently allow the
AM to span across sub-clusters. All container allocations are done by the YARN
RM framework that consists of the AMRMProxy fronting the home and other
sub-cluster RMs.
3. Intercepts all the requests, thus it can enforce application quotas, which
would not be enforceable by sub-cluster RM (as each only see a fraction of the
AM requests).
4. The AMRMProxy can enforce load-balancing / overflow policies.
{noformat}
Blank line should be inserted as well.
> Fix itemization in YARN federation document
> -------------------------------------------
>
> Key: YARN-7736
> URL: https://issues.apache.org/jira/browse/YARN-7736
> Project: Hadoop YARN
> Issue Type: Bug
> Components: documentation
> Reporter: Akira Ajisaka
> Priority: Minor
> Labels: newbie
>
> https://hadoop.apache.org/docs/r3.0.0/hadoop-yarn/hadoop-yarn-site/Federation.html
> {noformat}
> Assumptions:
> * We assume reasonably good connectivity across sub-clusters (e.g., we are
> not looking to federate across DC yet, though future investigations of this
> are not excluded).
> * We rely on HDFS federation (or equivalently scalable DFS solutions) to take
> care of scalability of the store side.
> {noformat}
> Blank line should be inserted before itemization to render correctly.
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