HDF5 Library: Version 1.8.13 rank 0: ==== Parameters ==== rank 0: IO API=posix mpiio phdf5 rank 0: Number of files=1 rank 0: Number of datasets=1 rank 0: Number of iterations=1 rank 0: Number of processes=1:4 rank 0: Number of bytes per process per dataset=256KB rank 0: Size of dataset(s)=256KB:1MB rank 0: File size=256KB:1MB rank 0: Transfer buffer size=128KB:256KB rank 0: Block size=128KB rank 0: Block Pattern in Dataset=Contiguous rank 0: I/O Method for MPI and HDF5=Independent rank 0: Geometry=1D rank 0: VFL used for HDF5 I/O=MPI-IO driver rank 0: Data storage method in HDF5=Contiguous rank 0: Env HDF5_PARAPREFIX=not set rank 0: Dumping MPI Info Object(9183424) (up to 256 bytes per item): object is MPI_INFO_NULL rank 0: ==== End of Parameters ==== Number of processors = 4 Transfer Buffer Size: 131072 bytes, File size: 1.00 MBs # of files: 1, # of datasets: 1, dataset size: 1.00 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 868.75 MB/s Average Throughput: 868.75 MB/s Minimum Throughput: 868.75 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 185.67 MB/s Average Throughput: 185.67 MB/s Minimum Throughput: 185.67 MB/s Read (1 iteration(s)): Maximum Throughput: 2939.25 MB/s Average Throughput: 2939.25 MB/s Minimum Throughput: 2939.25 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 2598.70 MB/s Average Throughput: 2598.70 MB/s Minimum Throughput: 2598.70 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 1098.85 MB/s Average Throughput: 1098.85 MB/s Minimum Throughput: 1098.85 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 9.64 MB/s Average Throughput: 9.64 MB/s Minimum Throughput: 9.64 MB/s Read (1 iteration(s)): Maximum Throughput: 6213.78 MB/s Average Throughput: 6213.78 MB/s Minimum Throughput: 6213.78 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 1157.37 MB/s Average Throughput: 1157.37 MB/s Minimum Throughput: 1157.37 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 177.65 MB/s Average Throughput: 177.65 MB/s Minimum Throughput: 177.65 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 84.42 MB/s Average Throughput: 84.42 MB/s Minimum Throughput: 84.42 MB/s Read (1 iteration(s)): Maximum Throughput: 2801.81 MB/s Average Throughput: 2801.81 MB/s Minimum Throughput: 2801.81 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 609.73 MB/s Average Throughput: 609.73 MB/s Minimum Throughput: 609.73 MB/s Transfer Buffer Size: 262144 bytes, File size: 1.00 MBs # of files: 1, # of datasets: 1, dataset size: 1.00 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 1084.64 MB/s Average Throughput: 1084.64 MB/s Minimum Throughput: 1084.64 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 539.32 MB/s Average Throughput: 539.32 MB/s Minimum Throughput: 539.32 MB/s Read (1 iteration(s)): Maximum Throughput: 5714.31 MB/s Average Throughput: 5714.31 MB/s Minimum Throughput: 5714.31 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 4604.07 MB/s Average Throughput: 4604.07 MB/s Minimum Throughput: 4604.07 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 1068.34 MB/s Average Throughput: 1068.34 MB/s Minimum Throughput: 1068.34 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 397.15 MB/s Average Throughput: 397.15 MB/s Minimum Throughput: 397.15 MB/s Read (1 iteration(s)): Maximum Throughput: 6584.46 MB/s Average Throughput: 6584.46 MB/s Minimum Throughput: 6584.46 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 1575.03 MB/s Average Throughput: 1575.03 MB/s Minimum Throughput: 1575.03 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 1032.06 MB/s Average Throughput: 1032.06 MB/s Minimum Throughput: 1032.06 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 441.32 MB/s Average Throughput: 441.32 MB/s Minimum Throughput: 441.32 MB/s Read (1 iteration(s)): Maximum Throughput: 3701.95 MB/s Average Throughput: 3701.95 MB/s Minimum Throughput: 3701.95 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 825.81 MB/s Average Throughput: 825.81 MB/s Minimum Throughput: 825.81 MB/s Number of processors = 2 Transfer Buffer Size: 131072 bytes, File size: 0.50 MBs # of files: 1, # of datasets: 1, dataset size: 0.50 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 772.72 MB/s Average Throughput: 772.72 MB/s Minimum Throughput: 772.72 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 437.82 MB/s Average Throughput: 437.82 MB/s Minimum Throughput: 437.82 MB/s Read (1 iteration(s)): Maximum Throughput: 4279.90 MB/s Average Throughput: 4279.90 MB/s Minimum Throughput: 4279.90 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 3472.11 MB/s Average Throughput: 3472.11 MB/s Minimum Throughput: 3472.11 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 1111.37 MB/s Average Throughput: 1111.37 MB/s Minimum Throughput: 1111.37 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 349.64 MB/s Average Throughput: 349.64 MB/s Minimum Throughput: 349.64 MB/s Read (1 iteration(s)): Maximum Throughput: 3934.62 MB/s Average Throughput: 3934.62 MB/s Minimum Throughput: 3934.62 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 1116.10 MB/s Average Throughput: 1116.10 MB/s Minimum Throughput: 1116.10 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 854.93 MB/s Average Throughput: 854.93 MB/s Minimum Throughput: 854.93 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 283.13 MB/s Average Throughput: 283.13 MB/s Minimum Throughput: 283.13 MB/s Read (1 iteration(s)): Maximum Throughput: 2499.59 MB/s Average Throughput: 2499.59 MB/s Minimum Throughput: 2499.59 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 556.13 MB/s Average Throughput: 556.13 MB/s Minimum Throughput: 556.13 MB/s Transfer Buffer Size: 262144 bytes, File size: 0.50 MBs # of files: 1, # of datasets: 1, dataset size: 0.50 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 1094.55 MB/s Average Throughput: 1094.55 MB/s Minimum Throughput: 1094.55 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 684.00 MB/s Average Throughput: 684.00 MB/s Minimum Throughput: 684.00 MB/s Read (1 iteration(s)): Maximum Throughput: 3125.41 MB/s Average Throughput: 3125.41 MB/s Minimum Throughput: 3125.41 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 2688.66 MB/s Average Throughput: 2688.66 MB/s Minimum Throughput: 2688.66 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 1077.67 MB/s Average Throughput: 1077.67 MB/s Minimum Throughput: 1077.67 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 396.89 MB/s Average Throughput: 396.89 MB/s Minimum Throughput: 396.89 MB/s Read (1 iteration(s)): Maximum Throughput: 2995.93 MB/s Average Throughput: 2995.93 MB/s Minimum Throughput: 2995.93 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 1118.48 MB/s Average Throughput: 1118.48 MB/s Minimum Throughput: 1118.48 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 865.16 MB/s Average Throughput: 865.16 MB/s Minimum Throughput: 865.16 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 321.75 MB/s Average Throughput: 321.75 MB/s Minimum Throughput: 321.75 MB/s Read (1 iteration(s)): Maximum Throughput: 2074.33 MB/s Average Throughput: 2074.33 MB/s Minimum Throughput: 2074.33 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 527.45 MB/s Average Throughput: 527.45 MB/s Minimum Throughput: 527.45 MB/s Number of processors = 1 Transfer Buffer Size: 131072 bytes, File size: 0.25 MBs # of files: 1, # of datasets: 1, dataset size: 0.25 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 708.02 MB/s Average Throughput: 708.02 MB/s Minimum Throughput: 708.02 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 477.06 MB/s Average Throughput: 477.06 MB/s Minimum Throughput: 477.06 MB/s Read (1 iteration(s)): Maximum Throughput: 2803.68 MB/s Average Throughput: 2803.68 MB/s Minimum Throughput: 2803.68 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 2502.57 MB/s Average Throughput: 2502.57 MB/s Minimum Throughput: 2502.57 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 708.02 MB/s Average Throughput: 708.02 MB/s Minimum Throughput: 708.02 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 277.18 MB/s Average Throughput: 277.18 MB/s Minimum Throughput: 277.18 MB/s Read (1 iteration(s)): Maximum Throughput: 2688.66 MB/s Average Throughput: 2688.66 MB/s Minimum Throughput: 2688.66 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 841.55 MB/s Average Throughput: 841.55 MB/s Minimum Throughput: 841.55 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 564.36 MB/s Average Throughput: 564.36 MB/s Minimum Throughput: 564.36 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 197.47 MB/s Average Throughput: 197.47 MB/s Minimum Throughput: 197.47 MB/s Read (1 iteration(s)): Maximum Throughput: 1544.29 MB/s Average Throughput: 1544.29 MB/s Minimum Throughput: 1544.29 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 322.64 MB/s Average Throughput: 322.64 MB/s Minimum Throughput: 322.64 MB/s Transfer Buffer Size: 262144 bytes, File size: 0.25 MBs # of files: 1, # of datasets: 1, dataset size: 0.25 MBs IO API = POSIX Write (1 iteration(s)): Maximum Throughput: 735.33 MB/s Average Throughput: 735.33 MB/s Minimum Throughput: 735.33 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 494.15 MB/s Average Throughput: 494.15 MB/s Minimum Throughput: 494.15 MB/s Read (1 iteration(s)): Maximum Throughput: 1774.24 MB/s Average Throughput: 1774.24 MB/s Minimum Throughput: 1774.24 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 1643.54 MB/s Average Throughput: 1643.54 MB/s Minimum Throughput: 1643.54 MB/s IO API = MPIO Write (1 iteration(s)): Maximum Throughput: 696.27 MB/s Average Throughput: 696.27 MB/s Minimum Throughput: 696.27 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 282.79 MB/s Average Throughput: 282.79 MB/s Minimum Throughput: 282.79 MB/s Read (1 iteration(s)): Maximum Throughput: 1952.66 MB/s Average Throughput: 1952.66 MB/s Minimum Throughput: 1952.66 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 752.75 MB/s Average Throughput: 752.75 MB/s Minimum Throughput: 752.75 MB/s IO API = PHDF5 (w/MPI-IO driver) Write (1 iteration(s)): Maximum Throughput: 586.78 MB/s Average Throughput: 586.78 MB/s Minimum Throughput: 586.78 MB/s Write Open-Close (1 iteration(s)): Maximum Throughput: 201.15 MB/s Average Throughput: 201.15 MB/s Minimum Throughput: 201.15 MB/s Read (1 iteration(s)): Maximum Throughput: 1275.64 MB/s Average Throughput: 1275.64 MB/s Minimum Throughput: 1275.64 MB/s Read Open-Close (1 iteration(s)): Maximum Throughput: 312.45 MB/s Average Throughput: 312.45 MB/s Minimum Throughput: 312.45 MB/s