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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HADOOP-15891) Provide Regex Based Mount Point In Inode Tree
Date Sat, 12 Sep 2020 20:09:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15891?focusedWorklogId=482630&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-482630

ASF GitHub Bot logged work on HADOOP-15891:

                Author: ASF GitHub Bot
            Created on: 12/Sep/20 20:08
            Start Date: 12/Sep/20 20:08
    Worklog Time Spent: 10m 
      Work Description: umamaheswararao commented on pull request #2185:
URL: https://github.com/apache/hadoop/pull/2185#issuecomment-690863729

   +1 on the latest patch. Thanks again for your great work @JohnZZGithub 
   Test failures are unrelated.
   I think we are 3 line crossed for a warning. Looks like it's not worth minor refactor for
sake of that unless we do full refactoring of that method. Please file separate issue to refactor
into much cleaner with smaller methods. I will proceed to commit the current patch. 

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Issue Time Tracking

    Worklog Id:     (was: 482630)
    Time Spent: 9h 10m  (was: 9h)

> Provide Regex Based Mount Point In Inode Tree
> ---------------------------------------------
>                 Key: HADOOP-15891
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15891
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: viewfs
>            Reporter: zhenzhao wang
>            Assignee: zhenzhao wang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0
>         Attachments: HADOOP-15891.015.patch, HDFS-13948.001.patch, HDFS-13948.002.patch,
HDFS-13948.003.patch, HDFS-13948.004.patch, HDFS-13948.005.patch, HDFS-13948.006.patch, HDFS-13948.007.patch,
HDFS-13948.008.patch, HDFS-13948.009.patch, HDFS-13948.011.patch, HDFS-13948.012.patch, HDFS-13948.013.patch,
HDFS-13948.014.patch, HDFS-13948_ Regex Link Type In Mont Table-V0.pdf, HDFS-13948_ Regex
Link Type In Mount Table-v1.pdf
>          Time Spent: 9h 10m
>  Remaining Estimate: 0h
> 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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