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https://issues.apache.org/jira/browse/HDFS-3689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14103523#comment-14103523
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Jing Zhao commented on HDFS-3689:
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Thanks for the comments, [~cutting]! Do you think it is possible that we can
locate and fix these applications? Or can a lower limit of the block length be
helpful on the performance perspective? Basically I guess variable block length
can also improve the performance and efficiency of a lot of applications. For
example, Hive may save up to 40% of storage that is currently cost by padding.
Thus it will be great if we can have this feature while still keep the existing
applications working fine.
> 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
>
>
> 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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