{
    "block_size": [
        "128K",
        "256K",
        "1M"
    ],
    "queue_depth": [
        4,
        16,
        32
    ],
    "io_parallel": [
        1,
        2,
        4,
        8
    ],
    "single_submit": [
        true,
        false
    ],
    "overlap_events": [
        true,
        false
    ],
    "threads": [
        1
    ]
}