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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12916) Allow RPC scheduler/callqueue backoff using response times
Date Fri, 22 Apr 2016 19:15:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254495#comment-15254495
] 

Kihwal Lee commented on HADOOP-12916:
-------------------------------------

For namenode RPC server, doesn't the rpc response time include the namesystem lock wait time?
It may not work correctly for namenode then.

> Allow RPC scheduler/callqueue backoff using response times
> ----------------------------------------------------------
>
>                 Key: HADOOP-12916
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12916
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12916.00.patch, HADOOP-12916.01.patch, HADOOP-12916.02.patch,
HADOOP-12916.03.patch, HADOOP-12916.04.patch, HADOOP-12916.05.patch, HADOOP-12916.06.patch,
HADOOP-12916.07.patch, HADOOP-12916.08.patch
>
>
> Currently back off policy from HADOOP-10597 is hard coded to base on whether call queue
is full. This ticket is open to allow flexible back off policies such as moving average of
response time in RPC calls of different priorities. 



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