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From "zhenzhao wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-13948) Provide Regex Based Mount Point In Inode Tree
Date Mon, 01 Oct 2018 18:43:13 GMT
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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