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https://issues.apache.org/jira/browse/HADOOP-8143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101755#comment-17101755
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Kihwal Lee commented on HADOOP-8143:
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For those who want this to be the default behavior, you can achieve it using
config.
In {{distcp-site.xml}}, set the following to preserve checksum and block size.
{code:xml}
<property>
<name>distcp.always.preserve.checksum</name>
<value>true</value>
</property>
{code}
If you build your own hadoop releases, you can put it in {{distcp-default.xml}}.
> Change distcp to have -pb on by default
> ---------------------------------------
>
> Key: HADOOP-8143
> URL: https://issues.apache.org/jira/browse/HADOOP-8143
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Dave Thompson
> Assignee: Mithun Radhakrishnan
> Priority: Minor
> Fix For: 3.0.0-alpha4
>
> Attachments: HADOOP-8143.1.patch, HADOOP-8143.2.patch,
> HADOOP-8143.3.patch
>
>
> We should have the preserve blocksize (-pb) on in distcp by default.
> checksum which is on by default will always fail if blocksize is not the same.
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