Wei-Chiu Chuang created HDFS-14959:
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Summary: [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
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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