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https://issues.apache.org/jira/browse/HDFS-17341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17807938#comment-17807938
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ASF GitHub Bot commented on HDFS-17341:
---------------------------------------
li-leyang opened a new pull request, #6461:
URL: https://github.com/apache/hadoop/pull/6461
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> Support dedicated user queues in Namenode FairCallQueue
> -------------------------------------------------------
>
> Key: HDFS-17341
> URL: https://issues.apache.org/jira/browse/HDFS-17341
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.10.0, 3.4.0
> Reporter: Lei Yang
> Priority: Major
>
> Some service users today in namenode like ETL, metrics collection, ad-hoc
> users that are critical to run business critical job accounts for many
> traffic in namenode and shouldn't be throttled the same way as other
> individual users in FCQ.
> There is feature in namenode to always prioritize some service users to not
> subject to FCQ scheduling. (Those users are always p0) but it is not perfect
> and it doesn't account for traffic surge from those users.
> The idea is to allocate dedicated rpc queues for those service users with
> bounded queue capacity and allocate processing weight for those users. If
> queue is full, those users are expected to backoff and retry.
>
> New configs:
> {code:java}
> "faircallqueue.reserved.users"; // list of service users that are assigned to
> dedicated queue
> "faircallqueue.reserved.users.max"; // max number of service users allowed
> "faircallqueue.reserved.users.capacities"; // custom queue capacities for
> each service user
> "faircallqueue.multiplexer.reserved.weights"; // processing weights for each
> dedicated queue{code}
>
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