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Posted to user@pig.apache.org by Lai Will <la...@student.ethz.ch> on 2011/03/03 23:03:01 UTC

frontend & backend

Hello,

When skimming through the API I sometimes find docs like:

"Get the JobConf. This should only be called on the backend. It will return null on the frontend".

What do they refer to as backend / frontend?

Best,
Will

Re: frontend & backend

Posted by Alan Gates <ga...@yahoo-inc.com>.

Frontend is the machine you launch Pig from.  This is where all  
planning is done.  The backend is the Hadoop cluster where your jobs  
are executed.

Alan.

On Mar 3, 2011, at 2:03 PM, Lai Will wrote:

> Hello,
>
> When skimming through the API I sometimes find docs like:
>
> "Get the JobConf. This should only be called on the backend. It will  
> return null on the frontend".
>
> What do they refer to as backend / frontend?
>
> Best,
> Will