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https://issues.apache.org/jira/browse/HDFS-744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017010#comment-13017010
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Tsz Wo (Nicholas), SZE commented on HDFS-744:
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Hi Hairong,
We also don't have a {{FileSystem.create(..)}} API which let user create a
file, or append to it when the file already exists. If you are changing
{{FileSystem.create(..)}}, you might want to add it as well. Alternatively, we
might do it in a separated JIRA.
> Support hsync in HDFS
> ---------------------
>
> Key: HDFS-744
> URL: https://issues.apache.org/jira/browse/HDFS-744
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Hairong Kuang
>
> HDFS-731 implements hsync by default as hflush. As descriibed in HADOOP-6313,
> the real expected semantics should be "flushes out to all replicas and all
> replicas have done posix fsync equivalent - ie the OS has flushed it to the
> disk device (but the disk may have it in its cache)." This jira aims to
> implement the expected behaviour.
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