A mapper node and a reducer node respectively run on different central processing units (CPUs) in a CPU pool, and a remote shared partition shared by the mapper node and the reducer node is delimited in the storage pool. The mapper node executes a map task to obtain a data segment, and stores the data segment into a remote shared partition. The reducer node directly obtains a to-be-processed data segment from the remote shared partition, and executes a reduce task on the to-be-processed data segment.