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https://issues.apache.org/jira/browse/HADOOP-18629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17688351#comment-17688351
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ASF GitHub Bot commented on HADOOP-18629:
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zhuyaogai opened a new pull request, #5391:
URL: https://github.com/apache/hadoop/pull/5391
### Description of PR
Hadoop DistCp supports specifying favoredNodes for data copying.
### How was this patch tested?
Add new UT.
### For code changes:
- [ ] 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?
> Hadoop DistCp supports specifying favoredNodes for data copying
> ---------------------------------------------------------------
>
> Key: HADOOP-18629
> URL: https://issues.apache.org/jira/browse/HADOOP-18629
> Project: Hadoop Common
> Issue Type: New Feature
> Components: tools
> Reporter: zhuyaogai
> Priority: Major
>
> When importing large scale data to HBase, we always generate the hfiles with
> other Hadoop cluster, use the Distcp tool to copy the data to the HBase
> cluster, and bulkload data to HBase table. However, the data locality is
> rather low which may result in high query latency. After taking a compaction
> it will recover. Therefore, we can increase the data locality by specifying
> the favoredNodes in Distcp.
> Could I submit a pull request to optimize it?
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