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From Vinod Kumar Vavilapalli <vino...@hortonworks.com>
Subject Re: how to create symbolic link in hdfs with c++ code or webhdfs interface?
Date Fri, 13 Dec 2013 18:25:12 GMT
What version of Hadoop?

Thanks,
+Vinod

On Dec 13, 2013, at 1:57 AM, Xiaobin She <xiaobinshe@gmail.com> wrote:

> I'm writting an c++ programme, and I need to deal with hdfs.
> 
> What I need is to create some file in hdfs and read the status of these files.
> 
> And I need to be able to create sym link in hdfs and need to know if an file in hdfs
is an sym link file or not.
> 
> According to what I have known, the c client lib of hdfs ( which is libhdfs) does not
support sym link.
> 
> And I have notice that there is an webhdfs interface for hdfs.
> 
> According to this page, it does support sym link.
> 
> 
> http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Create_a_Symbolic_Link
> 
> 
> But I have try this, and I got the following message.
> 
> {"RemoteException":{"exception":"UnsupportedOperationException","javaClassName":"java.lang.UnsupportedOperationException","message":"Symlinks
not supported"}}
> 
> 
> Does this means webhdfs does not support sym link too ?
> 
> So if this true, how can I create an sym link and get the status of this file in c++
code?
> 
> thank you very much for your help.


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