Ahmad, Yes, http is used. Reducer tasks fetch map output via http from TaskTrackers.
Sriguru ----- Original Message ----- From: Ahmad Shahzad <[email protected]> To: [email protected] <[email protected]> Cc: Ahmad Shahzad <[email protected]> Sent: Thu Jul 01 07:54:51 2010 Subject: Question regarding Shuffle Hi ALL, Does anyone know HOW Mappers pass their output to Reducers? Is HTTP used for that or there is some other communication protocol used for transferring the output of Mappers to Reducers. Regards, Ahmad Shahzad
