Tom McCormick created HADOOP-18473:
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Summary: New API for enclosing root path for a file
Key: HADOOP-18473
URL: https://issues.apache.org/jira/browse/HADOOP-18473
Project: Hadoop Common
Issue Type: Improvement
Reporter: Tom McCormick
At LinkedIn we run many HDFS volumes that are federated by either
ViewFilesystem or Router Based Federation. As our number of hdfs volumes grows,
we have a growing need to migrate data seemlessly across volumes.
Many frameworks have a notion of staging or temp directories, but those
directories often live in random locations. We want an API getEnclosingRoot,
which provides the root path a file or dataset.
In ViewFilesystem / Router Based Federation, the enclosingRoot will be the
mount point.
We will also take into account other restrictions for renames like encryptions
zones.
If there are several paths (a mount point and an encryption zone), we will
return the longer path
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