Brahma Reddy Battula edited comment on HDFS-12157 at 8/9/17 9:03 AM:

will hold for commit till [~kihwal] review once.

was (Author: brahmareddy):
will hold for commit till [~kihwal] review once..?

> Do fsyncDirectory(..) outside of FSDataset lock
> -----------------------------------------------
>                 Key: HDFS-12157
>                 URL: https://issues.apache.org/jira/browse/HDFS-12157
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Vinayakumar B
>            Assignee: Vinayakumar B
>            Priority: Critical
>         Attachments: HDFS-12157-01.patch, HDFS-12157-branch-2-01.patch, 
> HDFS-12157-branch-2.7-01.patch, HDFS-12157-branch-2.7-01.patch
> HDFS-5042 introduced fsyncDirectory(..) to save blocks from power failure. 
> Do it outside of FSDataset lock to avoid overall performance degradation if 
> disk takes more time to sync.

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