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https://issues.apache.org/jira/browse/HDFS-16917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17688856#comment-17688856
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ASF GitHub Bot commented on HDFS-16917:
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rdingankar opened a new pull request, #5397:
URL: https://github.com/apache/hadoop/pull/5397
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### Description of PR
Transfer rate metric for datanode reads will be calculated as the rate at
which bytes are read ( bytes per ms )
With quantiles we will get a distribution of this rate which will be helpful
in identifying slow datanodes.
### How was this patch tested?
### For code changes:
- [ Y] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ NA] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ NA] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
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`NOTICE-binary` files?
> Add transfer rate quantile metrics for DataNode reads
> -----------------------------------------------------
>
> Key: HDFS-16917
> URL: https://issues.apache.org/jira/browse/HDFS-16917
> Project: Hadoop HDFS
> Issue Type: Task
> Components: datanode
> Reporter: Ravindra Dingankar
> Priority: Minor
>
> Currently we have the following metrics for datanode reads.
> |BytesRead
> BlocksRead
> TotalReadTime|Total number of bytes read from DataNode
> Total number of blocks read from DataNode
> Total number of milliseconds spent on read operation|
> We would like to add a new quantile metric calculating the distribution of
> data transfer rate for datanode reads.
>
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