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https://issues.apache.org/jira/browse/HDFS-17303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17844139#comment-17844139
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ASF GitHub Bot commented on HDFS-17303:
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huangzhaobo99 opened a new pull request, #6801:
URL: https://github.com/apache/hadoop/pull/6801
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### Description of PR
1. The delay reported by DN to NN is an average delay of 3 hours.
MutableRollingAverages: WINDOW_SIZE_MS_DEFAULT = 300_000 NUM_WINDOWS_DEFAULT
= 36
2. Changeing this window size and num to configurable param.
### How was this patch tested?
Add UT
> Make WINDOW_SIZE and NUM_WINDOWS configurable.
> ----------------------------------------------
>
> Key: HDFS-17303
> URL: https://issues.apache.org/jira/browse/HDFS-17303
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Zhaobo Huang
> Assignee: Zhaobo Huang
> Priority: Major
>
> 1. The delay reported by DN to NN is an average delay of 3 hours, which
> confuses me.
> MutableRollingAverages: WINDOW_SIZE_MS_DEFAULT = 300_000 NUM_WINDOWS_DEFAULT
> = 36
> 2. There is a time limit for SlowNodes collected by nn, which is currently
> set to 5ms by default (dfs.datanode.slowpeer.low.threshold.ms), while the
> time threshold for printing SlowNode logs written downstream is 300ms
> (dfs.datanode.low.io.warning.threshold.ms).
> 3. Can changeing this window size and num to configurable param?
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