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MapReduce, mail # user - Why SSH


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Re: Why SSH
unmesha sreeveni 2013-11-11, 08:33
I guess it is  TCP .

The server is DataXceiverServer<http://www.grepcode.com/file/repository.cloudera.com/content/repositories/releases/org.apache.hadoop/hadoop-hdfs/2.0.0-cdh4.3.0/org/apache/hadoop/hdfs/server/datanode/DataXceiverServer.java?av=f>
and
the client is DFSClient<http://www.grepcode.com/file/repository.cloudera.com/content/repositories/releases/org.apache.hadoop/hadoop-hdfs/2.0.0-cdh4.3.0/org/apache/hadoop/hdfs/DFSClient.java#DFSClient>.
Basiclly, they use the Java Socket API.

DataXceiverServer<http://www.grepcode.com/file/repository.cloudera.com/content/repositories/releases/org.apache.hadoop/hadoop-hdfs/2.0.0-cdh4.3.0/org/apache/hadoop/hdfs/server/datanode/DataXceiverServer.java?av=f>
:
http://www.grepcode.com/file/repository.cloudera.com/content/repositories/releases/org.apache.hadoop/hadoop-hdfs/2.0.0-cdh4.3.0/org/apache/hadoop/hdfs/server/datanode/DataXceiverServer.java?av=f

On Mon, Nov 11, 2013 at 12:11 PM, Harsh J <[EMAIL PROTECTED]> wrote:

> Neither of those. We stream data directly over a TCP network socket.
>
> Please read http://wiki.apache.org/hadoop/FAQ#Does_Hadoop_require_SSH.3F
> regarding your SSH confusion.
>
> On Mon, Nov 11, 2013 at 10:21 AM, rab ra <[EMAIL PROTECTED]> wrote:
> > Hello
> >
> > I have a question. To transfer the files to datanodes what protocol
> hadoop
> > uses? SSH or http or https
>
>
>
> --
> Harsh J
>

--
*Thanks & Regards*

Unmesha Sreeveni U.B

*Junior Developer*

*Amrita Center For Cyber Security*
* Amritapuri.www.amrita.edu/cyber/ <http://www.amrita.edu/cyber/>*