The impact of spatial layout of jobs on parallel I/O performance
Jens Mache, Virginia M. Lo, Marilynn Livingston, Sharad Garg · 1999
Input/Output is a big obstacle to effective use of tenflops- scale computing systems, Motivated by earlier parallel I/O meaurements on an Intel TFLOPS machine, we conduct studies to determine the sensitivity of parallel I/O performance on multi-progmmmed mesh-connected machines with respect to number of I/O nodes, number of compute nodes, network link bandwidth, I/O node bandwidth, spatial layout of jobs, and read or write demands of applications.Our extensive simulations and analytical modeling yield important insights into the limitations on parallel I/O performance due to network contention, and into the possible gains in parallel I/O performance that can be achieved by