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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-245) Create symbolic links in HDFS
Date Fri, 29 Jan 2010 21:37:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806512#action_12806512
] 

Tsz Wo (Nicholas), SZE commented on HDFS-245:
---------------------------------------------

You may already have it: I think we need tests for cycles and different file system schemes,
e.g.
{noformat}
  hdfs://namenode/foo/link1  (a symlink pointing to s3://hostname/bar)
  s3://hostname/bar/link2  (a symlink pointing to hdfs://namenode/foo)
{noformat}
Then, test various commands like ls, cp, distcp, etc.

> Create symbolic links in HDFS
> -----------------------------
>
>                 Key: HDFS-245
>                 URL: https://issues.apache.org/jira/browse/HDFS-245
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: dhruba borthakur
>            Assignee: Eli Collins
>         Attachments: 4044_20081030spi.java, designdocv1.txt, designdocv2.txt, designdocv3.txt,
HADOOP-4044-strawman.patch, symlink-0.20.0.patch, symlink-25-hdfs.patch, symlink-26-hdfs.patch,
symlink-26-hdfs.patch, symLink1.patch, symLink1.patch, symLink11.patch, symLink12.patch, symLink13.patch,
symLink14.patch, symLink15.txt, symLink15.txt, symlink16-common.patch, symlink16-hdfs.patch,
symlink16-mr.patch, symlink17-common.txt, symlink17-hdfs.txt, symlink18-common.txt, symlink19-common-delta.patch,
symlink19-common.txt, symlink19-common.txt, symlink19-hdfs-delta.patch, symlink19-hdfs.txt,
symlink20-common.patch, symlink20-hdfs.patch, symlink21-common.patch, symlink21-hdfs.patch,
symlink22-common.patch, symlink22-hdfs.patch, symlink23-common.patch, symlink23-hdfs.patch,
symlink24-hdfs.patch, symlink27-hdfs.patch, symlink28-hdfs.patch, symlink29-hdfs.patch, symlink29-hdfs.patch,
symlink30-hdfs.patch, symlink31-hdfs.patch, symlink33-hdfs.patch, symLink4.patch, symLink5.patch,
symLink6.patch, symLink8.patch, symLink9.patch
>
>
> HDFS should support symbolic links. A symbolic link is a special type of file that contains
a reference to another file or directory in the form of an absolute or relative path and that
affects pathname resolution. Programs which read or write to files named by a symbolic link
will behave as if operating directly on the target file. However, archiving utilities can
handle symbolic links specially and manipulate them directly.

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