MACSio

MACSio (Multi-purpose, Application-Centric, Scalable I/O Proxy Application) is being developed to fill a long existing void in co-design proxy applications that allow for I/O performance testing and evaluation of tradeoffs in data models, I/O library interfaces and parallel I/O paradigms for multi-physics, HPC applications.

MACSio in h5bench only supports the HDF5 interface. You need to have the json-cwx dependency library installed prior to compiling it in h5bench.

You can find more information in MACSio GitHub repository.

Configuration

You can configure the MACSio benchmark with the following options. Notice that if you use the configuration.json approach to define the runs for h5bench, we will automatically generate the final configuration file based on the options you provide in the JSON file. For standalone usage of this benchmark, you can refer to MACSio repository.

Parameter	Description
`parallel_file_mode`	Defines the parallel file mode
`part_size`	Defines the request sized (default per-proc request size is 80,0000 bytes (10K doubles))
`avg_num_parts`	Number of parts per process (default is 2)
`num_dumps`	Number of dumps (default is 10)

For the parallel_file_mode you can use Multiple Independent File (MIF) or Single Shared File (SIF) and specify the number of HDF5 files right after this parameter (see example below).

JSON Configuration (recomended)

To run an instance of MACSio HDF5 benchmark you need to include the following in the benchmarks property of your configuration.json file:

{
    "benchmark": "macsio",
    "file": "test.h5",
    "configuration": {
        "parallel_file_mode": "MIF 8",
        "part_size": "1M"
    }
}