Tsz Wo (Nicholas), SZE created HDFS-4523:
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Summary: Fix concat for snapshots
Key: HDFS-4523
URL: https://issues.apache.org/jira/browse/HDFS-4523
Project: Hadoop HDFS
Issue Type: Sub-task
Components: namenode
Reporter: Tsz Wo (Nicholas), SZE
Assignee: Tsz Wo (Nicholas), SZE
The use case of concat is for copying large files across clusters using the
following steps.
- Step 1: The blocks of a file in the source cluster are copied in parallel to
transient files in the destination cluster.
- Step 2: Then the transient files in the destination cluster are concatenated
in order to obtain the original file.
If a snapshot is taken in the destination cluster before Step 2, some transient
files may be captured in the snapshot. These transient files should be removed
in Step 2.
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