Bluehost Fio Disk Tests
NVMe 4 - Nov 10 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 15967 2093 1963 1499 1794 2572
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-o4h01q/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-20261109-50542-o4h01q/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": 2638,
      "eta": 0,
      "majf": 0,
      "minf": 13,
      "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": 2043748,
        "iops": 15966.783887,
        "bw_agg": 100.0,
        "bw_dev": 848780.338694,
        "bw_max": 3108096,
        "bw_min": 82176,
        "lat_ns": {
          "N": 958023,
          "max": 7322985871,
          "min": 98079,
          "mean": 1963375.45325,
          "stddev": 43209727.967177,
          "percentile": {
            "50.000000": 1499136,
            "95.000000": 1794048,
            "99.000000": 2572288
          }
        },
        "bw_mean": 2356784.601942,
        "clat_ns": {
          "N": 958023,
          "max": 7322978860,
          "min": 87001,
          "mean": 1956555.373464,
          "stddev": 43209724.124791,
          "percentile": {
            "50.000000": 1482752,
            "95.000000": 1794048,
            "99.000000": 2572288
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 958023,
          "max": 2472181,
          "min": 2905,
          "mean": 6820.079786,
          "stddev": 4073.490304
        },
        "bw_bytes": 2092798297,
        "drop_ios": 0,
        "io_bytes": 125569990656,
        "iops_max": 24282,
        "iops_min": 642,
        "io_kbytes": 122626944,
        "iops_mean": 18412.330097,
        "short_ios": 0,
        "total_ios": 958023,
        "bw_samples": 103,
        "iops_stddev": 6631.092786,
        "iops_samples": 103
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "sequential_write",
      "sys_cpu": 15.475,
      "usr_cpu": 60.776667,
      "job_start": 1794276425246,
      "latency_ms": {
        "2": 97.854123,
        "4": 1.429611,
        "10": 0.088516,
        "20": 0.068161,
        "50": 0.441534,
        "100": 0.037055,
        "250": 0.0,
        "500": 0.0,
        "750": 0.0,
        "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": 0.0,
        "50": 0.0,
        "100": 0.01,
        "250": 0.01,
        "500": 0.01,
        "750": 0.017536,
        "1000": 0.051251
      },
      "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": 60000,
      "iodepth_level": {
        "1": 0.1,
        "2": 0.1,
        "4": 0.1,
        "8": 0.1,
        "16": 0.1,
        "32": 99.996764,
        ">=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": 99.999896,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Mon Nov  9 18:08:05 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 67.451517,
      "in_queue": 637537,
      "read_ios": 0,
      "write_ios": 956137,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 623196,
      "read_sectors": 0,
      "write_merges": 644,
      "write_sectors": 244708816
    }
  ],
  "timestamp": 1794276485,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794276485391,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-o4h01q/fio.dat",
    "ioengine": "libaio"
  }
}
Sequential read, 128 KiB 93752 12288 341 338 506 569
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-7e2znt/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-20261109-50542-7e2znt/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": 259455,
      "eta": 0,
      "majf": 0,
      "minf": 1038,
      "read": {
        "bw": 12000256,
        "iops": 93752.004133,
        "bw_agg": 100.0,
        "bw_dev": 511126.950352,
        "bw_max": 12879616,
        "bw_min": 10525696,
        "lat_ns": {
          "N": 5625214,
          "max": 29228513,
          "min": 77128,
          "mean": 341166.451534,
          "stddev": 121916.238016,
          "percentile": {
            "50.000000": 337920,
            "95.000000": 505856,
            "99.000000": 569344
          }
        },
        "bw_mean": 12015136.268908,
        "clat_ns": {
          "N": 5625214,
          "max": 29221593,
          "min": 49445,
          "mean": 337086.444526,
          "stddev": 122003.707309,
          "percentile": {
            "50.000000": 333824,
            "95.000000": 501760,
            "99.000000": 569344
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 5625214,
          "max": 2217556,
          "min": 2713,
          "mean": 4080.007009,
          "stddev": 2586.827533
        },
        "bw_bytes": 12288262685,
        "drop_ios": 0,
        "io_bytes": 737308049408,
        "iops_max": 100622,
        "iops_min": 82232,
        "io_kbytes": 720027392,
        "iops_mean": 93868.285714,
        "short_ios": 0,
        "total_ios": 5625214,
        "bw_samples": 119,
        "iops_stddev": 3993.2085,
        "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": 42.896667,
      "usr_cpu": 4.326667,
      "job_start": 1794276339661,
      "latency_ms": {
        "2": 0.02007,
        "4": 0.01,
        "10": 0.01,
        "20": 0.0,
        "50": 0.01,
        "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": 0.01,
        "100": 0.01,
        "250": 17.311181,
        "500": 77.423223,
        "750": 5.211837,
        "1000": 0.022097
      },
      "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": 99.999449,
        ">=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": 99.999982,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Mon Nov  9 18:06:39 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 62.684676,
      "in_queue": 1589763,
      "read_ios": 5616251,
      "write_ios": 416,
      "read_ticks": 1589386,
      "read_merges": 0,
      "write_ticks": 329,
      "read_sectors": 1437760256,
      "write_merges": 658,
      "write_sectors": 11200
    }
  ],
  "timestamp": 1794276399,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794276399807,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-7e2znt/fio.dat",
    "ioengine": "libaio"
  }
}
Random write, 4 KiB 116984 479 271 214 281 317
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-xwiipn/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-20261109-50542-xwiipn/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": 72183,
      "eta": 0,
      "majf": 0,
      "minf": 13,
      "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": 467936,
        "iops": 116984.100265,
        "bw_agg": 100.0,
        "bw_dev": 82571.693882,
        "bw_max": 617424,
        "bw_min": 187696,
        "lat_ns": {
          "N": 7019163,
          "max": 9375316096,
          "min": 36856,
          "mean": 270538.003507,
          "stddev": 20352289.040187,
          "percentile": {
            "50.000000": 214016,
            "95.000000": 280576,
            "99.000000": 317440
          }
        },
        "bw_mean": 567606.040816,
        "clat_ns": {
          "N": 7019163,
          "max": 9375313061,
          "min": 32870,
          "mean": 267280.89139,
          "stddev": 20352288.489731,
          "percentile": {
            "50.000000": 211968,
            "95.000000": 276480,
            "99.000000": 313344
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 7019163,
          "max": 9106887,
          "min": 1302,
          "mean": 3257.112116,
          "stddev": 5060.134002
        },
        "bw_bytes": 479166874,
        "drop_ios": 0,
        "io_bytes": 28750491648,
        "iops_max": 154356,
        "iops_min": 46924,
        "io_kbytes": 28076652,
        "iops_mean": 141901.530612,
        "short_ios": 0,
        "total_ios": 7019163,
        "bw_samples": 98,
        "iops_stddev": 20642.924251,
        "iops_samples": 98
      },
      "elapsed": 61,
      "groupid": 0,
      "jobname": "random_write",
      "sys_cpu": 41.87,
      "usr_cpu": 34.131667,
      "job_start": 1794276245832,
      "latency_ms": {
        "2": 0.046672,
        "4": 0.08142,
        "10": 0.01,
        "20": 0.01,
        "50": 0.01,
        "100": 0.0,
        "250": 0.01,
        "500": 0.0,
        "750": 0.0,
        "1000": 0.01,
        "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": 0.0,
        "50": 0.01,
        "100": 0.023236,
        "250": 82.016146,
        "500": 17.754097,
        "750": 0.051445,
        "1000": 0.01664
      },
      "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": 99.999558,
        ">=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": 99.999986,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Mon Nov  9 18:05:05 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 46.630206,
      "in_queue": 1257455,
      "read_ios": 0,
      "write_ios": 7004466,
      "read_ticks": 0,
      "read_merges": 0,
      "write_ticks": 1236777,
      "read_sectors": 0,
      "write_merges": 348,
      "write_sectors": 56038736
    }
  ],
  "timestamp": 1794276305,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794276305974,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-xwiipn/fio.dat",
    "ioengine": "libaio"
  }
}
Random read, 4 KiB 164880 675 194 196 272 305
Commands and Raw Results
Prepare Command
fio --filename\=/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-wk3qu3/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-20261109-50542-wk3qu3/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": 464930,
      "eta": 0,
      "majf": 0,
      "minf": 43,
      "read": {
        "bw": 659520,
        "iops": 164880.101998,
        "bw_agg": 100.0,
        "bw_dev": 11333.949094,
        "bw_max": 722472,
        "bw_min": 634496,
        "lat_ns": {
          "N": 9892971,
          "max": 5970289,
          "min": 58339,
          "mean": 193892.858835,
          "stddev": 56325.501856,
          "percentile": {
            "50.000000": 195584,
            "95.000000": 272384,
            "99.000000": 305152
          }
        },
        "bw_mean": 659531.4,
        "clat_ns": {
          "N": 9892971,
          "max": 5966303,
          "min": 25379,
          "mean": 191737.833224,
          "stddev": 56404.319097,
          "percentile": {
            "50.000000": 193536,
            "95.000000": 272384,
            "99.000000": 301056
          }
        },
        "runtime": 60001,
        "slat_ns": {
          "N": 9892971,
          "max": 3458618,
          "min": 1131,
          "mean": 2155.025611,
          "stddev": 1874.482673
        },
        "bw_bytes": 675348897,
        "drop_ios": 0,
        "io_bytes": 40521609216,
        "iops_max": 180618,
        "iops_min": 158624,
        "io_kbytes": 39571884,
        "iops_mean": 164882.85,
        "short_ios": 0,
        "total_ios": 9892971,
        "bw_samples": 120,
        "iops_stddev": 2833.487273,
        "iops_samples": 120
      },
      "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": 39.275,
      "usr_cpu": 7.985,
      "job_start": 1794276156190,
      "latency_ms": {
        "2": 0.01,
        "4": 0.01,
        "10": 0.01,
        "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": 0.01,
        "100": 4.679898,
        "250": 83.902035,
        "500": 11.386691,
        "750": 0.012221,
        "1000": 0.01
      },
      "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": 99.999687,
        ">=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": 99.99999,
        "8": 0.0,
        "16": 0.0,
        "32": 0.1,
        "64": 0.0,
        ">=64": 0.0
      },
      "latency_percentile": 100.0
    }
  ],
  "time": "Mon Nov  9 18:03:36 2026",
  "disk_util": [
    {
      "name": "sda",
      "util": 62.903441,
      "in_queue": 1606311,
      "read_ios": 9875373,
      "write_ios": 164,
      "read_ticks": 1606238,
      "read_merges": 0,
      "write_ticks": 72,
      "read_sectors": 79002984,
      "write_merges": 339,
      "write_sectors": 4232
    }
  ],
  "timestamp": 1794276216,
  "fio version": "fio-3.41",
  "timestamp_ms": 1794276216336,
  "global options": {
    "size": "42949672960",
    "sync": "0",
    "direct": "1",
    "iodepth": "32",
    "numjobs": "1",
    "filename": "/opt/uupdates/current/fio_tests/vpsb-fio-20261109-50542-wk3qu3/fio.dat",
    "ioengine": "libaio"
  }
}

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