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https://issues.apache.org/jira/browse/HDFS-7691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhe Zhang resolved HDFS-7691.
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    Resolution: Duplicate

Thanks Vinay for confirming. Let's track the hflush related efforts under 
HDFS-7661.

> Handle hflush and hsync in the best optimal way possible during online 
> Erasure encoding
> ---------------------------------------------------------------------------------------
>
>                 Key: HDFS-7691
>                 URL: https://issues.apache.org/jira/browse/HDFS-7691
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Vinayakumar B
>            Assignee: Vinayakumar B
>
> as mentioned in design doc, hsync and hflush tends to make the online erasure 
> encoding complex.
> But these are critical features to ensure fault tolerance for some users.
> These operations should be supported in best way possible during online 
> erasure encoding to support the fault tolerance.
> This Jira is a placeholder for the task. How to solve this will be discussed 
> later.



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