1. A method for transmission of map/reduce data in a data center having a storage area network, the data center including multiple servers deployed with a job tracker, at least one map task tracker, and at least one reduce task tracker, the method comprising: in response to receiving a map task allocated by the job tracker, the at least one map task tracker performing the map task and generating map task outputs; the at least one map task tracker writing the map task outputs to the storage area network, by transmitting the map task outputs to the storage area network via a fiber channel protocol, the at least one map task tracker does not communicate with the storage area network via a local area network, the at least one map task tracker writing the map task outputs to the storage area network further comprises; recording write position information of the map task outputs; and upon completion of the map task, sending a notification of completion of the map task to the job tracker and sending the write position information of the map task outputs to the job tracker; and in response to receiving a reduce task allocated by the job tracker and the write position information of the map task outputs provided from the job tracker, the at least one reduce task tracker reading the map task outputs, based on the write position information, from the storage area network by receiving the map task outputs via the fiber channel protocol, the at least one reduce task tracker does not communicate with the storage area network via the local area network.