Xun REN created HDFS-14764:
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Summary: HDFS count doesn't include snapshot files correctly
Key: HDFS-14764
URL: https://issues.apache.org/jira/browse/HDFS-14764
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Xun REN
Hi,
When we set a quota on a path, and that path contains some snapshots, in this
case, the status shown by the command "hdfs dfs -count -v -q /my_path" doesn't
match the real quota usage.
The -count here will only count the current path without counting the files in
the snapshots which are already deleted in the current path.
If there is a job continues to write files into that path, it will report an
error like
{code:java}
The NameSpace quota (directories and files) of directory /my_path is
exceeded{code}
While the count command shows there is still space.
Because, when we write files into a directory, it will also check the snapshot
files. But the count command will not check.
The idea here is to modify the report of "hdfs dfs -count" to include also the
files in snapshots. Ideally, we could add an additional column to show the
total number of files of the current directory + files deleted from the current
directory but referenced in the snapshots.
You could find in the attached text file the steps to reproduce the issue.
Thanks.
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