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https://issues.apache.org/jira/browse/HDFS-14403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16868816#comment-16868816
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Chao Sun commented on HDFS-14403:
---------------------------------
The latest patch v11 LGTM. +1. Although keep in mind that I'm not a committer
so probably better if someone else could give a stamp on this as well. :)
One extension of this is useful for us: in our environment, we have a few
service user accounts who tend to issue lot more requests (including writes)
than other normal user accounts. Because of this, we don't want to treat these
special service accounts the same as the rest. Not sure what's a good solution
to this at the moment. Perhaps in future the CostProvider can also be user
identity aware and have different behavior accordingly.
> Cost-Based RPC FairCallQueue
> ----------------------------
>
> Key: HDFS-14403
> URL: https://issues.apache.org/jira/browse/HDFS-14403
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ipc, namenode
> Reporter: Erik Krogen
> Assignee: Christopher Gregorian
> Priority: Major
> Labels: qos, rpc
> Attachments: CostBasedFairCallQueueDesign_v0.pdf,
> HDFS-14403.001.patch, HDFS-14403.002.patch, HDFS-14403.003.patch,
> HDFS-14403.004.patch, HDFS-14403.005.patch, HDFS-14403.006.combined.patch,
> HDFS-14403.006.patch, HDFS-14403.007.patch, HDFS-14403.008.patch,
> HDFS-14403.009.patch, HDFS-14403.010.patch, HDFS-14403.011.patch,
> HDFS-14403.branch-2.8.patch
>
>
> HADOOP-15016 initially described extensions to the Hadoop FairCallQueue
> encompassing both cost-based analysis of incoming RPCs, as well as support
> for reservations of RPC capacity for system/platform users. This JIRA intends
> to track the former, as HADOOP-15016 was repurposed to more specifically
> focus on the reservation portion of the work.
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