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https://issues.apache.org/jira/browse/HDFS-14959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HDFS-14959.
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Resolution: Fixed
Merged the PR to trunk and cherry pick the commit to branch-3.2 and branch-3.1.
Thanks [~csun]!
> [SBNN read] access time should be turned off
> --------------------------------------------
>
> Key: HDFS-14959
> URL: https://issues.apache.org/jira/browse/HDFS-14959
> Project: Hadoop HDFS
> Issue Type: Task
> Components: documentation
> Reporter: Wei-Chiu Chuang
> Assignee: Chao Sun
> Priority: Major
> Fix For: 3.3.0, 3.1.4, 3.2.2
>
>
> Both Uber and Didi shared that access time has to be switched off to avoid
> spiky NameNode RPC process time. If access time is not off entirely,
> getBlockLocations RPCs have to update access time and must access the active
> NameNode. (that's my understanding. haven't checked the code)
> We should record this as a best practice in our doc.
> (If you are on the ASF slack, check out this thread
> https://the-asf.slack.com/archives/CAD7C52Q3/p1572033324008600)
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