melissayou opened a new pull request, #5536:
URL: https://github.com/apache/hadoop/pull/5536
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### Description of PR
In Filesystem.java, currently it only collects bytes read not the
corresponding timing of reads.
In particular, we're interested in time spent on remote reads(not local
reads). Adding timing info will help us understand it better and further
analyze how locality of DN behaves.
### How was this patch tested?
Ran hadoop-common and hadoop-hdsf related unit tests locally with and
without the change.
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] 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)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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