zhenzhao wang created HDFS-13948:
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Summary: Provide Regex Based Mount Point In Inode Tree
Key: HDFS-13948
URL: https://issues.apache.org/jira/browse/HDFS-13948
Project: Hadoop HDFS
Issue Type: New Feature
Components: fs
Reporter: zhenzhao wang
Assignee: zhenzhao wang
This jira is created to support regex based mount point in Inode Tree. We
noticed that mount point only support fixed target path. However, we might have
user cases when target needs to refer some fields from source. e.g. We might
want a mapping of /cluster1/user1 => /cluster1-dc1/user-nn-user1, we want to
refer `cluster` and `user` field in source to construct target. It's impossible
to archive this with current link type. Though we could set one-to-one mapping,
the mount table would become bloated if we have thousands of users. Besides, a
regex mapping would empower us more flexibility. So we are going to build a
regex based mount point which target could refer groups from src regex mapping.
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