Figure 2. I/O Rates for three parallel I/O approaches.
Blue curves for ALL-PE Global I/O with direct access, without MPI. Sec.2.C.
Magenta curves Single-PE I/O + MPI, Sec.2.A.
Red curves for mix Multi-PE I/O + MPI where a fraction of PEs access the file
with direct access. Sec.2.D. The single file size is 128MB. Striped over 16
disk partitions.