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https://issues.apache.org/jira/browse/HDFS-7056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14171346#comment-14171346
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Hari Mankude commented on HDFS-7056:
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Is the proposal to copy the list of blocks to snapshot copy only when the file
is truncated or is it when snapshot is taken irrespective of whether file is
truncated or not?
After the file is truncated and then appended again, will all subsequent
snapshots of the file get a copy of block list?
> Snapshot support for truncate
> -----------------------------
>
> Key: HDFS-7056
> URL: https://issues.apache.org/jira/browse/HDFS-7056
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Konstantin Shvachko
>
> Implementation of truncate in HDFS-3107 does not allow truncating files which
> are in a snapshot. It is desirable to be able to truncate and still keep the
> old file state of the file in the snapshot.
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