Jing Zhao created HDFS-4213:
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Summary: When the client calls hsync(), allows the client to
update the file length in the NameNode
Key: HDFS-4213
URL: https://issues.apache.org/jira/browse/HDFS-4213
Project: Hadoop HDFS
Issue Type: New Feature
Affects Versions: 3.0.0
Reporter: Jing Zhao
Assignee: Jing Zhao
As per discussion in HDFS-3960 and HDFS-2802, when clients that need strong
consistency update the file length at the NameNode, a special sync is required
for getting the length of the being written files when snapshots are taken for
these files. This jira implements this sync-with-updating-length by 1) calling
ClientProtocol#fsync(), and 2) adding a new field to ClientProtocol#fsync() to
indicate the length information.
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