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https://issues.apache.org/jira/browse/HADOOP-8143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16056487#comment-16056487
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Wei-Chiu Chuang commented on HADOOP-8143:
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Hi Mithun,
My understanding of the patch, is that if -p is not specified, block size is
preserved; however, if say distcp runs with -pr (preserve replication factor),
then block size is not preserved.
What you proposed, sounds to be that -pb becomes a deprecated option because
block size is _always_ preserved, which I don't think is the purpose of this
jira. Please correct me if I am wrong. Thanks.
> 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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