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

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