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https://issues.apache.org/jira/browse/HDFS-3689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14285063#comment-14285063
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Colin Patrick McCabe commented on HDFS-3689:
--------------------------------------------
Thanks for working on this, Jing.
{code}
320 public FSDataOutputStream append(Path f, final boolean toNewBlock,
321 final int bufferSize, final Progressable progress) throws
IOException {
{code}
Let's make {{toNewBlock}} a {{CreateFlag}} and create a new append function
that takes an {{EnumSet}} of {{CreateFlag}}. We talked about this earlier and
the combinatorial explosion of {{FileSystem}} overloaded functions is a real
problem, which the {{CreateFlag}} strategy solves really well. This also makes
it easy to use the feature via {{FileContext}}.
Also, are you targetting this for 3.0 or for a 2.x release?
> 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: Jing Zhao
> Attachments: HDFS-3689.000.patch, HDFS-3689.001.patch,
> HDFS-3689.002.patch, HDFS-3689.003.patch, HDFS-3689.003.patch,
> HDFS-3689.004.patch, HDFS-3689.005.patch, HDFS-3689.006.patch,
> HDFS-3689.007.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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