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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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Masatake Iwasaki updated HDFS-5274:
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Attachment: HDFS-5274-13.patch
added tests for the cases tracing disabled.
> 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-5274-10.patch, HDFS-5274-11.txt, HDFS-5274-12.patch, HDFS-5274-13.patch,
> HDFS-5274-2.patch, HDFS-5274-3.patch, HDFS-5274-4.patch, HDFS-5274-5.patch,
> HDFS-5274-6.patch, HDFS-5274-7.patch, HDFS-5274-8.patch, HDFS-5274-8.patch,
> HDFS-5274-9.patch, Zipkin Trace a06e941b0172ec73.png, Zipkin Trace
> d0f0d66b8a258a69.png, ss-5274v8-get.png, ss-5274v8-put.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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