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https://issues.apache.org/jira/browse/HDFS-3689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14104400#comment-14104400
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Andrey Stepachev commented on HDFS-3689:
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[~cutting] I mentioned flag just as one of possible solutions to prevent
accidental reads of merged files (text files for example). With this flag
application declares, that it is ok with paddings and that it will handle them
properly.
> Add support for variable length block
> -------------------------------------
>
> Key: HDFS-3689
> URL: https://issues.apache.org/jira/browse/HDFS-3689
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: datanode, hdfs-client, namenode
> Affects Versions: 3.0.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: HDFS-3689.000.patch, HDFS-3689.001.patch
>
>
> Currently HDFS supports fixed length blocks. Supporting variable length block
> will allow new use cases and features to be built on top of HDFS.
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