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https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640332#action_12640332
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Raghu Angadi commented on HADOOP-4044:
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> The same thing that happens if that change is made just after a file is
> opened. If you open a file, then someone else deletes it, subsequent accesses
> to that file will fail.
yes, thats an HDFS implementation problems which could be fixed. That is
qualitatively different from similar issues 'forced' by FS layer/API (which
could also be fixed in future).
I don't have strong preference either way regd implementation.
With extra RPC some of the negatives I see (nothing too urgent):
- we won't see many negative affects since there are very few loads that are
gated by NameNode currently. It might change
- Every couple of months we might need to answer "why is this so..?" question
on the list :)
- In my experience any extra work done that could be avoided will end up
being a problem in future. Especially large distribute systems. So sooner or
later we will end up 'correct' it.
> 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
> Attachments: HADOOP-4044-strawman.patch, symLink1.patch,
> symLink1.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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