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https://issues.apache.org/jira/browse/HADOOP-14495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051596#comment-16051596
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Steve Loughran commented on HADOOP-14495:
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I think we need to to allow apps to declare that they *must* have a feature, a
key one being that hsync really does have the expected semantics of "by the
time this returns, the data has been persisted". The {{Syncable}} interface
doesn't offer this guarantee, as all implementations of {{FSDataOutputStream}}
claim to be {{Syncable}}.
I also want the ability to set some specific options on a stream some just
being a hint. That fadvise is my example, but as that's a need on an input
stream, an issue for a separate builder. A better example is erasure-coding,
maybe just something indicating expected data role, at least that something is
going to be considered cool/cold data (though apps don't always know that
themselves)
> Add set options interface to FSDataOutputStreamBuilder
> -------------------------------------------------------
>
> Key: HADOOP-14495
> URL: https://issues.apache.org/jira/browse/HADOOP-14495
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Affects Versions: 3.0.0-alpha3
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
>
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