Evoxt Fio Disk Tests
VM-4 - Nov 14 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 6890 903 4613 3457 10945 19005
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-b18nxa/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-20261114-54617-b18nxa/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": 52390,
      "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": 881952,
        "iops": 6890.255282,
        "bw_agg": 100.0,
        "bw_dev": 143196.712397,
        "bw_max": 1344768,
        "bw_min": 541440,
        "lat_ns": {
          "N": 413498,
          "max": 86000713,
          "min": 228153,
          "mean": 4612969.590868,
          "stddev": 3685314.382249,
          "percentile": {
            "50.000000": 3457024,
            "95.000000": 10944512,
            "99.000000": 19005440
          }
        },
        "bw_mean": 882931.470588,
        "clat_ns": {
          "N": 413498,
          "max": 85988921,
          "min": 2425,
          "mean": 4584987.364761,
          "stddev": 3683135.365595,
          "percentile": {
            "50.000000": 3424256,
            "95.000000": 10944512,
            "99.000000": 19005440
          }
        },
        "runtime": 60012,
        "slat_ns": {
          "N": 413498,
          "max": 9878398,
          "min": 5502,
          "mean": 27982.226108,
          "stddev": 129840.670216
        },
        "bw_bytes": 903119540,
        "drop_ios": 0,
        "io_bytes": 54198009856,
        "iops_max": 10506,
        "iops_min": 4230,
        "io_kbytes": 52927744,
        "iops_mean": 6897.739496,
        "short_ios": 0,
        "total_ios": 413498,
        "bw_samples": 119,
        "iops_stddev": 1118.730011,
        "iops_samples": 119
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "sequential_write",
      "sys_cpu": 22.780824,
      "usr_cpu": 23.359051,
      "job_start": 1794682394735,
      "latency_ms": {
        "2": 12.671645,
        "4": 44.832865,
        "10": 34.882394,
        "20": 5.536907,
        "50": 0.82056,
        "100": 0.028779,
        "250": 0.0,
        "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": 0.01,
        "10": 0.01,
        "20": 0.0,
        "50": 0.0,
        "100": 0.01,
        "250": 0.013301,
        "500": 0.111246,
        "750": 0.311972,
        "1000": 0.788637
      },
      "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": 60011,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.992503,
        ">=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": 99.999758,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Sat Nov 14 10:54:14 2026",
  "disk_util": [
    {
      "name": "vda",
      "util": 62.341994,
      "in_queue": 1635271,
      "read_ios": 0,
      "write_ios": 418141,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 1635228,
      "read_sectors": 0,
      "write_merges": 172,
      "write_sectors": 105797784
    }
  ],
  "timestamp": 1794682454,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794682454858,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-b18nxa/fio.dat",
    "ioengine": "libaio"
  }
}
Sequential read, 128 KiB 45908 6017 696 635 1171 1729
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-doujc9/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-20261114-54617-doujc9/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": 100109,
      "eta": 0,
      "majf": 0,
      "minf": 1037,
      "read": {
        "bw": 5876194,
        "iops": 45907.768204,
        "bw_agg": 100.0,
        "bw_dev": 474495.743082,
        "bw_max": 6676224,
        "bw_min": 4448768,
        "lat_ns": {
          "N": 2754512,
          "max": 7243677,
          "min": 176670,
          "mean": 695797.017861,
          "stddev": 274795.231248,
          "percentile": {
            "50.000000": 634880,
            "95.000000": 1171456,
            "99.000000": 1728512
          }
        },
        "bw_mean": 5880182.453782,
        "clat_ns": {
          "N": 2754512,
          "max": 7229030,
          "min": 94898,
          "mean": 682016.196836,
          "stddev": 275065.779299,
          "percentile": {
            "50.000000": 618496,
            "95.000000": 1155072,
            "99.000000": 1712128
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 2754512,
          "max": 2034022,
          "min": 4378,
          "mean": 13780.821025,
          "stddev": 12411.952092
        },
        "bw_bytes": 6017222994,
        "drop_ios": 0,
        "io_bytes": 361039396864,
        "iops_max": 52158,
        "iops_min": 34756,
        "io_kbytes": 352577536,
        "iops_mean": 45938.92437,
        "short_ios": 0,
        "total_ios": 2754512,
        "bw_samples": 119,
        "iops_stddev": 3706.986634,
        "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": 69.295,
      "usr_cpu": 7.286667,
      "job_start": 1794682304218,
      "latency_ms": {
        "2": 8.654564,
        "4": 0.503429,
        "10": 0.019023,
        "20": 0.0,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "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": 0.0,
        "100": 0.01,
        "250": 0.042585,
        "500": 20.624851,
        "750": 52.301206,
        "1000": 17.854306
      },
      "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": 99.998875,
        ">=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": 99.999964,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Sat Nov 14 10:52:44 2026",
  "disk_util": [
    {
      "name": "vda",
      "util": 45.797184,
      "in_queue": 1467168,
      "read_ios": 2749091,
      "write_ios": 54,
      "read_ticks": 1467153,
      "read_merges": 0,
      "write_ticks": 13,
      "read_sectors": 703758080,
      "write_merges": 11,
      "write_sectors": 616
    }
  ],
  "timestamp": 1794682364,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794682364275,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-doujc9/fio.dat",
    "ioengine": "libaio"
  }
}
Random write, 4 KiB 28236 116 1130 610 3785 8978
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-4w5gcd/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-20261114-54617-4w5gcd/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": 65842,
      "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": 112945,
        "iops": 28236.479392,
        "bw_agg": 99.629099,
        "bw_dev": 75495.919458,
        "bw_max": 248136,
        "bw_min": 26224,
        "lat_ns": {
          "N": 1694217,
          "max": 55153097,
          "min": 87503,
          "mean": 1130302.691573,
          "stddev": 1891530.460613,
          "percentile": {
            "50.000000": 610304,
            "95.000000": 3784704,
            "99.000000": 8978432
          }
        },
        "bw_mean": 112528.0,
        "clat_ns": {
          "N": 1694217,
          "max": 55147357,
          "min": 60353,
          "mean": 1120044.086383,
          "stddev": 1889004.484095,
          "percentile": {
            "50.000000": 602112,
            "95.000000": 3751936,
            "99.000000": 8847360
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 1694217,
          "max": 10058633,
          "min": 1425,
          "mean": 10258.60519,
          "stddev": 49864.181174
        },
        "bw_bytes": 115656619,
        "drop_ios": 0,
        "io_bytes": 6939512832,
        "iops_max": 62034,
        "iops_min": 6556,
        "io_kbytes": 6776868,
        "iops_mean": 28131.92437,
        "short_ios": 0,
        "total_ios": 1694217,
        "bw_samples": 119,
        "iops_stddev": 18874.058111,
        "iops_samples": 119
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "random_write",
      "sys_cpu": 36.053333,
      "usr_cpu": 10.221667,
      "job_start": 1794682212449,
      "latency_ms": {
        "2": 13.657696,
        "4": 6.599745,
        "10": 3.734823,
        "20": 0.620287,
        "50": 0.167806,
        "100": 0.01,
        "250": 0.0,
        "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": 0.0,
        "100": 0.01,
        "250": 3.212103,
        "500": 33.007283,
        "750": 27.325543,
        "1000": 11.67259
      },
      "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": 99.99817,
        ">=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": 99.999941,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Sat Nov 14 10:51:12 2026",
  "disk_util": [
    {
      "name": "vda",
      "util": 67.935354,
      "in_queue": 1508707,
      "read_ios": 0,
      "write_ios": 1690756,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 1508674,
      "read_sectors": 0,
      "write_merges": 40,
      "write_sectors": 13526352
    }
  ],
  "timestamp": 1794682272,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794682272545,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-4w5gcd/fio.dat",
    "ioengine": "libaio"
  }
}
Random read, 4 KiB 52837 216 604 522 1188 1892
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-3ebl03/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-20261114-54617-3ebl03/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": 103639,
      "eta": 0,
      "majf": 0,
      "minf": 47,
      "read": {
        "bw": 211346,
        "iops": 52836.552724,
        "bw_agg": 100.0,
        "bw_dev": 21536.226802,
        "bw_max": 268352,
        "bw_min": 159512,
        "lat_ns": {
          "N": 3170246,
          "max": 14336449,
          "min": 100468,
          "mean": 603556.074034,
          "stddev": 336585.130185,
          "percentile": {
            "50.000000": 522240,
            "95.000000": 1187840,
            "99.000000": 1892352
          }
        },
        "bw_mean": 211423.957983,
        "clat_ns": {
          "N": 3170246,
          "max": 14332001,
          "min": 82976,
          "mean": 594895.996487,
          "stddev": 335870.53484,
          "percentile": {
            "50.000000": 514048,
            "95.000000": 1187840,
            "99.000000": 1875968
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 3170246,
          "max": 3105140,
          "min": 1360,
          "mean": 8660.077546,
          "stddev": 18080.537876
        },
        "bw_bytes": 216418519,
        "drop_ios": 0,
        "io_bytes": 12985327616,
        "iops_max": 67088,
        "iops_min": 39878,
        "io_kbytes": 12680984,
        "iops_mean": 52855.97479,
        "short_ios": 0,
        "total_ios": 3170246,
        "bw_samples": 119,
        "iops_stddev": 5384.072494,
        "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": "random_read",
      "sys_cpu": 57.453333,
      "usr_cpu": 11.655,
      "job_start": 1794682109992,
      "latency_ms": {
        "2": 7.817974,
        "4": 0.762685,
        "10": 0.035045,
        "20": 0.01,
        "50": 0.0,
        "100": 0.0,
        "250": 0.0,
        "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": 0.0,
        "100": 0.01,
        "250": 3.746902,
        "500": 43.234247,
        "750": 32.748657,
        "1000": 11.654174
      },
      "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": 99.999022,
        ">=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": 99.999968,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Sat Nov 14 10:49:30 2026",
  "disk_util": [
    {
      "name": "vda",
      "util": 61.233208,
      "in_queue": 1367724,
      "read_ios": 3165056,
      "write_ios": 78,
      "read_ticks": 1367668,
      "read_merges": 0,
      "write_ticks": 48,
      "read_sectors": 25320448,
      "write_merges": 38,
      "write_sectors": 2520
    }
  ],
  "timestamp": 1794682170,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794682170073,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261114-54617-3ebl03/fio.dat",
    "ioengine": "libaio"
  }
}

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