[
https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649532#action_12649532
]
Sanjay Radia commented on HADOOP-4044:
--------------------------------------
Druba wrote
* Archives - current implementation does not follow symbolic links.
* distcp - pure FileSystem client, does not follow symbolic links
What is the desirable default behavior when a user does a distcp or an archive
of a subtree that has symlinks to other
volumes?
To avoid accidental copying of large amounts of data, I suspect that the
default should be to copy the symlink as a symlink
rather than follow the symlink and copy its target.
If this is indeed the desired default behavior then the patch will need to fix
that.
On a related note, symlinks to an archive will throw an exception/error when
one tries to follow it. That would require a fix to the archive file system; we
should file a separate jira to fix that in the future.
> Create symbolic links in HDFS
> -----------------------------
>
> Key: HADOOP-4044
> URL: https://issues.apache.org/jira/browse/HADOOP-4044
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.20.0
>
> Attachments: 4044_20081030spi.java, HADOOP-4044-strawman.patch,
> symLink1.patch, symLink1.patch, symLink11.patch, symLink12.patch,
> symLink13.patch, symLink14.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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
