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Posted to hdfs-dev@hadoop.apache.org by "Ahmed Hussein (Jira)" <ji...@apache.org> on 2019/11/07 19:36:00 UTC
[jira] [Created] (HDFS-14968) Add ability to know datanode
staleness
Ahmed Hussein created HDFS-14968:
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Summary: Add ability to know datanode staleness
Key: HDFS-14968
URL: https://issues.apache.org/jira/browse/HDFS-14968
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode, logging, namenode
Reporter: Ahmed Hussein
Assignee: Ahmed Hussein
There is no way to know whether a DataNode was marked stale or no longer stale by the NameNode.
It will be good to have the option to enable logging the DataNode staleness to figure out if the staleness was the reason behind remote reads. Therefore, analyze performance and decision making of the local vs remote reads.
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