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https://issues.apache.org/jira/browse/HDFS-5274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliott Clark updated HDFS-5274:
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    Attachment: HDFS-5274-6.patch

Here's a patch that adds annotations for DFSInputStream.seek

> Add Tracing to HDFS
> -------------------
>
>                 Key: HDFS-5274
>                 URL: https://issues.apache.org/jira/browse/HDFS-5274
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>    Affects Versions: 2.1.1-beta
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: HDFS-5274-0.patch, HDFS-5274-1.patch, HDFS-5274-2.patch, 
> HDFS-5274-3.patch, HDFS-5274-4.patch, HDFS-5274-5.patch, HDFS-5274-6.patch, 
> Zipkin   Trace a06e941b0172ec73.png, Zipkin   Trace d0f0d66b8a258a69.png
>
>
> Since Google's Dapper paper has shown the benefits of tracing for a large 
> distributed system, it seems like a good time to add tracing to HDFS.  HBase 
> has added tracing using HTrace.  I propose that the same can be done within 
> HDFS.



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