OnetSolutions Fio Disk Tests
HP-32 - Oct 31 2026

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Each fio test runs for 60 seconds using the libaio I/O engine, one job, and a queue depth of 32. Direct I/O is enabled (direct=1) and synchronous writes (O_SYNC) are disabled. Before each test, fio prepares a fresh file with sequential 1 MiB writes and a final fsync. The file is up to 40 GiB, reduced when disk space is limited to leave at least 1 GiB or 10% of available space free, whichever is larger. Preparation time is separate from the 60-second measurement, and the file is removed after each test.

Test IOPS Throughput (MB/s) Mean Latency (µs) p50 (µs) p95 (µs) p99 (µs)
Sequential write, 128 KiB 10532 1380 2973 1729 4145 45351
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-ueu4pk/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=initialize --rw\=write --bs\=1M --refill_buffers\=1 --end_fsync\=1
Run Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-ueu4pk/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=sequential_write --rw\=write --bs\=131072 --runtime\=60 --time_based\=1 --allow_file_create\=0 --refill_buffers\=1 --lat_percentiles\=1 --percentile_list\=50:95:99
Raw Results
{
  "jobs": [
    {
      "ctx": 5601,
      "eta": 0,
      "majf": 0,
      "minf": 18,
      "read": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "sync": {
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "total_ios": 0
      },
      "trim": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "error": 0,
      "write": {
        "bw": 1348046,
        "iops": 10531.615418,
        "bw_agg": 100.0,
        "bw_dev": 476964.160588,
        "bw_max": 3534080,
        "bw_min": 512,
        "lat_ns": {
          "N": 632255,
          "max": 1879071872,
          "min": 63810,
          "mean": 2972712.311971,
          "stddev": 21603533.702306,
          "percentile": {
            "50.000000": 1728512,
            "95.000000": 4145152,
            "99.000000": 45350912
          }
        },
        "bw_mean": 1410269.035088,
        "clat_ns": {
          "N": 632255,
          "max": 1879058442,
          "min": 2480,
          "mean": 2954384.804433,
          "stddev": 21603432.730785,
          "percentile": {
            "50.000000": 1712128,
            "95.000000": 4145152,
            "99.000000": 45350912
          }
        },
        "runtime": 60034,
        "slat_ns": {
          "N": 632255,
          "max": 6525482,
          "min": 8370,
          "mean": 18327.507537,
          "stddev": 25251.273621
        },
        "bw_bytes": 1380399896,
        "drop_ios": 0,
        "io_bytes": 82870927360,
        "iops_max": 27610,
        "iops_min": 4,
        "io_kbytes": 80928640,
        "iops_mean": 11017.719298,
        "short_ios": 0,
        "total_ios": 632255,
        "bw_samples": 114,
        "iops_stddev": 3726.283426,
        "iops_samples": 114
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "sequential_write",
      "sys_cpu": 20.245532,
      "usr_cpu": 69.713324,
      "job_start": 1793406808380,
      "latency_ms": {
        "2": 39.156986,
        "4": 32.960593,
        "10": 4.662676,
        "20": 0.073072,
        "50": 0.268246,
        "100": 0.734039,
        "250": 0.181256,
        "500": 0.01,
        "750": 0.01,
        "1000": 0.01,
        "2000": 0.010122,
        ">=2000": 0.0
      },
      "latency_ns": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.0
      },
      "latency_us": {
        "2": 0.0,
        "4": 0.01,
        "10": 0.0,
        "20": 0.0,
        "50": 0.01,
        "100": 0.470064,
        "250": 2.698278,
        "500": 4.832228,
        "750": 5.75464,
        "1000": 8.192106
      },
      "job options": {
        "bs": "131072",
        "rw": "write",
        "name": "sequential_write",
        "runtime": "60",
        "time_based": "1",
        "refill_buffers": "1",
        "lat_percentiles": "1",
        "percentile_list": "50:95:99",
        "allow_file_create": "0"
      },
      "job_runtime": 60033,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.995097,
        ">=64": 0.0
      },
      "latency_depth": 32,
      "iodepth_submit": {
        "0": 0.0,
        "4": 100.0,
        "8": 0.0,
        "16": 0.0,
        "32": 0.0,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_target": 0,
      "latency_window": 0,
      "iodepth_complete": {
        "0": 0.0,
        "4": 99.999842,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Fri Oct 30 17:34:28 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 58.606072,
      "in_queue": 811338,
      "read_ios": 0,
      "write_ios": 631287,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 811337,
      "read_sectors": 0,
      "write_merges": 10,
      "write_sectors": 161597736
    }
  ],
  "timestamp": 1793406868,
  "fio version": "fio-3.41",
  "timestamp_ms": 1793406868446,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-ueu4pk/fio.dat",
    "ioengine": "libaio"
  }
}
Sequential read, 128 KiB 12305 1613 2600 602 5603 59507
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-i4ba08/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=initialize --rw\=write --bs\=1M --refill_buffers\=1 --end_fsync\=1
Run Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-i4ba08/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=sequential_read --rw\=read --bs\=131072 --runtime\=60 --time_based\=1 --allow_file_create\=0 --refill_buffers\=1 --lat_percentiles\=1 --percentile_list\=50:95:99
Raw Results
{
  "jobs": [
    {
      "ctx": 47429,
      "eta": 0,
      "majf": 0,
      "minf": 1036,
      "read": {
        "bw": 1575043,
        "iops": 12305.02825,
        "bw_agg": 100.0,
        "bw_dev": 299897.230916,
        "bw_max": 2464256,
        "bw_min": 575488,
        "lat_ns": {
          "N": 738314,
          "max": 180574432,
          "min": 57191,
          "mean": 2600066.812146,
          "stddev": 9621645.361271,
          "percentile": {
            "50.000000": 602112,
            "95.000000": 5603328,
            "99.000000": 59506688
          }
        },
        "bw_mean": 1578072.87395,
        "clat_ns": {
          "N": 738314,
          "max": 180559852,
          "min": 41811,
          "mean": 2582892.57336,
          "stddev": 9622230.619941,
          "percentile": {
            "50.000000": 585728,
            "95.000000": 5603328,
            "99.000000": 59506688
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 738314,
          "max": 1691768,
          "min": 8670,
          "mean": 17174.238786,
          "stddev": 12003.511975
        },
        "bw_bytes": 1612844662,
        "drop_ios": 0,
        "io_bytes": 96772292608,
        "iops_max": 19252,
        "iops_min": 4496,
        "io_kbytes": 94504192,
        "iops_mean": 12328.705882,
        "short_ios": 0,
        "total_ios": 738314,
        "bw_samples": 119,
        "iops_stddev": 2342.955769,
        "iops_samples": 119
      },
      "sync": {
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "total_ios": 0
      },
      "trim": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "error": 0,
      "write": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "sequential_read",
      "sys_cpu": 22.431667,
      "usr_cpu": 1.965,
      "job_start": 1793406705898,
      "latency_ms": {
        "2": 12.766655,
        "4": 3.407222,
        "10": 1.220348,
        "20": 1.067026,
        "50": 1.731783,
        "100": 1.537422,
        "250": 0.034267,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.0,
        "2000": 0.0,
        ">=2000": 0.0
      },
      "latency_ns": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.0
      },
      "latency_us": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.01,
        "100": 0.06271,
        "250": 0.321814,
        "500": 26.191837,
        "750": 38.697221,
        "1000": 12.960746
      },
      "job options": {
        "bs": "131072",
        "rw": "read",
        "name": "sequential_read",
        "runtime": "60",
        "time_based": "1",
        "refill_buffers": "1",
        "lat_percentiles": "1",
        "percentile_list": "50:95:99",
        "allow_file_create": "0"
      },
      "job_runtime": 60000,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.995801,
        ">=64": 0.0
      },
      "latency_depth": 32,
      "iodepth_submit": {
        "0": 0.0,
        "4": 100.0,
        "8": 0.0,
        "16": 0.0,
        "32": 0.0,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_target": 0,
      "latency_window": 0,
      "iodepth_complete": {
        "0": 0.0,
        "4": 99.999865,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Fri Oct 30 17:32:45 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 89.580934,
      "in_queue": 1620284,
      "read_ios": 736712,
      "write_ios": 35,
      "read_ticks": 1620122,
      "read_merges": 0,
      "write_ticks": 163,
      "read_sectors": 188598272,
      "write_merges": 8,
      "write_sectors": 2920
    }
  ],
  "timestamp": 1793406765,
  "fio version": "fio-3.41",
  "timestamp_ms": 1793406765969,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-i4ba08/fio.dat",
    "ioengine": "libaio"
  }
}
Random write, 4 KiB 58073 238 545 537 692 963
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-h1pyqw/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=initialize --rw\=write --bs\=1M --refill_buffers\=1 --end_fsync\=1
Run Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-h1pyqw/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=random_write --rw\=randwrite --bs\=4096 --runtime\=60 --time_based\=1 --allow_file_create\=0 --refill_buffers\=1 --lat_percentiles\=1 --percentile_list\=50:95:99
Raw Results
{
  "jobs": [
    {
      "ctx": 1827,
      "eta": 0,
      "majf": 0,
      "minf": 14,
      "read": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "sync": {
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "total_ios": 0
      },
      "trim": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "error": 0,
      "write": {
        "bw": 232292,
        "iops": 58073.148781,
        "bw_agg": 100.0,
        "bw_dev": 37516.399792,
        "bw_max": 320008,
        "bw_min": 2344,
        "lat_ns": {
          "N": 3484447,
          "max": 589174870,
          "min": 69992,
          "mean": 545023.306592,
          "stddev": 1822419.955839,
          "percentile": {
            "50.000000": 536576,
            "95.000000": 692224,
            "99.000000": 962560
          }
        },
        "bw_mean": 232501.176471,
        "clat_ns": {
          "N": 3484447,
          "max": 589168970,
          "min": 59702,
          "mean": 535379.227077,
          "stddev": 1822301.212738,
          "percentile": {
            "50.000000": 528384,
            "95.000000": 675840,
            "99.000000": 946176
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 3484447,
          "max": 4677653,
          "min": 4940,
          "mean": 9644.079515,
          "stddev": 7757.073005
        },
        "bw_bytes": 237867617,
        "drop_ios": 0,
        "io_bytes": 14272294912,
        "iops_max": 80002,
        "iops_min": 586,
        "io_kbytes": 13937788,
        "iops_mean": 58125.310924,
        "short_ios": 0,
        "total_ios": 3484447,
        "bw_samples": 119,
        "iops_stddev": 9379.124571,
        "iops_samples": 119
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "random_write",
      "sys_cpu": 57.941667,
      "usr_cpu": 39.793333,
      "job_start": 1793406600195,
      "latency_ms": {
        "2": 0.668714,
        "4": 0.10567,
        "10": 0.042618,
        "20": 0.01,
        "50": 0.0,
        "100": 0.0,
        "250": 0.01,
        "500": 0.0,
        "750": 0.01,
        "1000": 0.0,
        "2000": 0.0,
        ">=2000": 0.0
      },
      "latency_ns": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.0
      },
      "latency_us": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.0,
        "100": 0.01,
        "250": 0.01,
        "500": 40.158309,
        "750": 57.3363,
        "1000": 1.684457
      },
      "job options": {
        "bs": "4096",
        "rw": "randwrite",
        "name": "random_write",
        "runtime": "60",
        "time_based": "1",
        "refill_buffers": "1",
        "lat_percentiles": "1",
        "percentile_list": "50:95:99",
        "allow_file_create": "0"
      },
      "job_runtime": 60000,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.99911,
        ">=64": 0.0
      },
      "latency_depth": 32,
      "iodepth_submit": {
        "0": 0.0,
        "4": 100.0,
        "8": 0.0,
        "16": 0.0,
        "32": 0.0,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_target": 0,
      "latency_window": 0,
      "iodepth_complete": {
        "0": 0.0,
        "4": 99.999971,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Fri Oct 30 17:31:00 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 68.422458,
      "in_queue": 215480,
      "read_ios": 0,
      "write_ios": 3477674,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 215366,
      "read_sectors": 0,
      "write_merges": 55,
      "write_sectors": 27830368
    }
  ],
  "timestamp": 1793406660,
  "fio version": "fio-3.41",
  "timestamp_ms": 1793406660264,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-h1pyqw/fio.dat",
    "ioengine": "libaio"
  }
}
Random read, 4 KiB 88359 362 362 313 528 831
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-dykbxb/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=initialize --rw\=write --bs\=1M --refill_buffers\=1 --end_fsync\=1
Run Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-dykbxb/fio.dat --size\=42949672960 --ioengine\=libaio --iodepth\=32 --numjobs\=1 --direct\=1 --sync\=0 --output-format\=json --name\=random_read --rw\=randread --bs\=4096 --runtime\=60 --time_based\=1 --allow_file_create\=0 --refill_buffers\=1 --lat_percentiles\=1 --percentile_list\=50:95:99
Raw Results
{
  "jobs": [
    {
      "ctx": 31590,
      "eta": 0,
      "majf": 0,
      "minf": 48,
      "read": {
        "bw": 353436,
        "iops": 88359.177347,
        "bw_agg": 100.0,
        "bw_dev": 107153.692224,
        "bw_max": 457840,
        "bw_min": 15,
        "lat_ns": {
          "N": 5301639,
          "max": 5971088646,
          "min": 25341,
          "mean": 361755.958636,
          "stddev": 12965302.496164,
          "percentile": {
            "50.000000": 313344,
            "95.000000": 528384,
            "99.000000": 831488
          }
        },
        "bw_mean": 369174.236842,
        "clat_ns": {
          "N": 5301639,
          "max": 5971072905,
          "min": 19560,
          "mean": 353478.654376,
          "stddev": 12965259.066064,
          "percentile": {
            "50.000000": 305152,
            "95.000000": 518144,
            "99.000000": 806912
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 5301639,
          "max": 5757445,
          "min": 4749,
          "mean": 8277.30426,
          "stddev": 5702.068465
        },
        "bw_bytes": 361919190,
        "drop_ios": 0,
        "io_bytes": 21715513344,
        "iops_max": 114460,
        "iops_min": 3,
        "io_kbytes": 21206556,
        "iops_mean": 92293.622807,
        "short_ios": 0,
        "total_ios": 5301639,
        "bw_samples": 114,
        "iops_stddev": 26788.475587,
        "iops_samples": 114
      },
      "sync": {
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "total_ios": 0
      },
      "trim": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "error": 0,
      "write": {
        "bw": 0,
        "iops": 0.0,
        "bw_agg": 0.0,
        "bw_dev": 0.0,
        "bw_max": 0,
        "bw_min": 0,
        "lat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_mean": 0.0,
        "clat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "runtime": 0,
        "slat_ns": {
          "N": 0,
          "max": 0,
          "min": 0,
          "mean": 0.0,
          "stddev": 0.0
        },
        "bw_bytes": 0,
        "drop_ios": 0,
        "io_bytes": 0,
        "iops_max": 0,
        "iops_min": 0,
        "io_kbytes": 0,
        "iops_mean": 0.0,
        "short_ios": 0,
        "total_ios": 0,
        "bw_samples": 0,
        "iops_stddev": 0.0,
        "iops_samples": 0
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "random_read",
      "sys_cpu": 75.911667,
      "usr_cpu": 11.646667,
      "job_start": 1793406496212,
      "latency_ms": {
        "2": 0.280121,
        "4": 0.011166,
        "10": 0.01,
        "20": 0.01,
        "50": 0.01,
        "100": 0.01,
        "250": 0.01,
        "500": 0.01,
        "750": 0.01,
        "1000": 0.0,
        "2000": 0.01,
        ">=2000": 0.01
      },
      "latency_ns": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.0,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.0
      },
      "latency_us": {
        "2": 0.0,
        "4": 0.0,
        "10": 0.0,
        "20": 0.01,
        "50": 0.026992,
        "100": 0.180699,
        "250": 34.359808,
        "500": 59.311998,
        "750": 4.689135,
        "1000": 1.129104
      },
      "job options": {
        "bs": "4096",
        "rw": "randread",
        "name": "random_read",
        "runtime": "60",
        "time_based": "1",
        "refill_buffers": "1",
        "lat_percentiles": "1",
        "percentile_list": "50:95:99",
        "allow_file_create": "0"
      },
      "job_runtime": 60000,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.999415,
        ">=64": 0.0
      },
      "latency_depth": 32,
      "iodepth_submit": {
        "0": 0.0,
        "4": 100.0,
        "8": 0.0,
        "16": 0.0,
        "32": 0.0,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_target": 0,
      "latency_window": 0,
      "iodepth_complete": {
        "0": 0.0,
        "4": 99.999981,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Fri Oct 30 17:29:16 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 64.385368,
      "in_queue": 975030,
      "read_ios": 5290757,
      "write_ios": 99,
      "read_ticks": 974935,
      "read_merges": 0,
      "write_ticks": 95,
      "read_sectors": 42326056,
      "write_merges": 331,
      "write_sectors": 3728
    }
  ],
  "timestamp": 1793406556,
  "fio version": "fio-3.41",
  "timestamp_ms": 1793406556289,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261030-62909-dykbxb/fio.dat",
    "ioengine": "libaio"
  }
}

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