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https://issues.apache.org/jira/browse/HADOOP-12643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15058486#comment-15058486
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Chris Nauroth commented on HADOOP-12643:
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I don't think we can switch the default behavior of {{-getmerge}} to skip
writing the CRC file. That might cause a backwards-compatibility problem.
Instead, I think we'll need to add a {{-skipcrc}} argument that opts out of
writing the CRC file. Unfortunately, that still won't be completely consistent
with {{-get}}, but at least users will have the ability to skip writing the CRC
file.
We could also consider making the {{-getmerge}} and {{-get}} arguments fully
consistent as a backwards-incompatible change on trunk/3.0.
> Allow getmerge command to skip writing the CRC file.
> ----------------------------------------------------
>
> Key: HADOOP-12643
> URL: https://issues.apache.org/jira/browse/HADOOP-12643
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Reporter: Chris Nauroth
>
> The {{-getmerge}} shell command always write a local CRC file. It's prefixed
> with a '.', so it's a hidden file and often goes unnoticed. This behavior
> differs from {{-get}}, which skips writing the CRC file by default, but
> allows the user to opt in to writing a CRC file by passing the {{-crc}}
> argument. This issue proposes adding support to {{-getmerge}} to skip
> writing the CRC file.
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