Optimization of Collective I/O in MPI-IO
Hao Zhang · Computer Engineering and Science · 2005
The paper proposes some improvements on the two-phase I/O algorithm which is the implementation of Collective I/O in the MPI-IO library. The new algorithm reduces the number of communications between the processes in the first phase by selecting a main contacting process, which results in the reduction of time expense in the communication process of the two-phase I/O algorithm and improves the whole I/O performance.