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https://issues.apache.org/jira/browse/HDFS-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153026#comment-14153026
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Masatake Iwasaki commented on HDFS-7055:
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bq. It's fairly granular tracing
I attached screenshot of spans for reference. It shows trace of getting 1MB of
file by FsShell on pseudo distributed cluster with .004 patch. The trace
consists of over 500 spans in this case.
> Add tracing to DFSInputStream
> -----------------------------
>
> Key: HDFS-7055
> URL: https://issues.apache.org/jira/browse/HDFS-7055
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Affects Versions: 2.6.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-7055.002.patch, HDFS-7055.003.patch,
> HDFS-7055.004.patch, screenshot-get-1mb.png
>
>
> Add tracing to DFSInputStream.
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