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Posted to hdfs-user@hadoop.apache.org by Chen Bangzhong <ba...@gmail.com> on 2010/04/08 09:47:56 UTC

where can I find the protocol between the nodes?

For example, the protocol between the client and the namenode? the protocol
between client and datanode for transfer?

I googled, but no finding.

thanks

Re: where can I find the protocol between the nodes?

Posted by Thanh Do <th...@cs.wisc.edu>.

check it out at:

org.apache.hadoop.hdfs.protocol.ClientProtocol;

On Thu, Apr 8, 2010 at 2:47 AM, Chen Bangzhong <ba...@gmail.com> wrote:

> For example, the protocol between the client and the namenode? the protocol
> between client and datanode for transfer?
>
> I googled, but no finding.
>
> thanks
>
>
>


-- 
thanh

Re: where can I find the protocol between the nodes?

Posted by Jitendra Nath Pandey <ji...@yahoo-inc.com>.

Checkout the interfaces that different services implement.
 For example Namenode implements ClientProtocol, DatanodeProtocol and a few
more. 
All these protocols should have javadoc telling about their purpose.

Data transfer between client and datanode is not over RPC protocol, rather
client sets up a socket connection and streams the data.

On 4/8/10 12:47 AM, "Chen Bangzhong" <ba...@gmail.com> wrote:

> For example, the protocol between the client and the namenode? the protocol
> between client and datanode for transfer?
> 
> I googled, but no finding.
> 
> thanks
> 
> 
>