{
  "schema": 3,
  "harness_version": "0.1.0",
  "started": "2026-09-09T01:18:34+00:00",
  "finished": "2026-09-09T01:43:03.057961+00:00",
  "seed": 204330278,
  "filesystems": {
    "source": "ext2/ext3",
    "destination": "xfs"
  },
  "source": "/path/to/empty-source-scratch",
  "destination": "/path/to/empty-destination-scratch",
  "aborted": null,
  "host": {
    "kernel": "5.15.0-126-generic",
    "machine": "x86_64",
    "cpus": 160,
    "python": "3.13.13",
    "hostname": "source-host"
  },
  "spec": {
    "name": "private-ext4-xfs-cross",
    "description": "Release 0.5.2 comparison; generated incompressible fixture; logical throughput",
    "endpoints": {
      "source": "/path/to/empty-source-scratch",
      "destination": "/path/to/empty-destination-scratch"
    },
    "tools": [
      {
        "name": "syq",
        "kind": "syq",
        "binary": "/path/to/syq",
        "args": [
          "rsync",
          "-a",
          "--stats",
          "--no-progress",
          "--syq-no-bootstrap"
        ],
        "debug": false
      },
      {
        "name": "syq-j32",
        "kind": "syq",
        "binary": "/path/to/syq",
        "args": [
          "rsync",
          "-a",
          "--stats",
          "--no-progress",
          "--syq-no-bootstrap",
          "--syq-connections",
          "32"
        ],
        "debug": false
      },
      {
        "name": "rsync",
        "kind": "rsync",
        "binary": "/usr/bin/rsync",
        "args": [
          "-a"
        ],
        "debug": false
      },
      {
        "name": "cp",
        "kind": "cp",
        "binary": "/usr/bin/cp",
        "args": [
          "-a"
        ],
        "debug": false
      }
    ],
    "workloads": [
      {
        "name": "large-file",
        "kind": "large-file",
        "bytes": 8589934592,
        "files": 1
      },
      {
        "name": "mixed-tree",
        "kind": "mixed-tree",
        "bytes": 8589934592,
        "files": 8000
      },
      {
        "name": "small-files",
        "kind": "small-files",
        "bytes": 838860800,
        "files": 200000
      }
    ],
    "protocol": {
      "repeats": 3,
      "seed": 204330278,
      "cache": "evict",
      "durable": false,
      "verify": true,
      "probes": false,
      "tool_timeout": 120,
      "slow_cutoff": 0
    }
  },
  "tools": {
    "syq": {
      "version": "syq 0.5.2",
      "sha256": "da584b363640f2757f485058103c4be5f906fd8f7fd7e5d582bbcfd98a9ca1ef",
      "binary": "syq"
    },
    "syq-j32": {
      "version": "syq 0.5.2",
      "sha256": "da584b363640f2757f485058103c4be5f906fd8f7fd7e5d582bbcfd98a9ca1ef",
      "binary": "syq"
    },
    "rsync": {
      "version": "rsync  version 3.2.7  protocol version 31",
      "sha256": "f029cadc3f0b1c879bf8dfb899f434703c13ee53197d27da5d17bf0faf1f1318",
      "binary": "rsync"
    },
    "cp": {
      "version": "cp (GNU coreutils) 8.32",
      "sha256": "ff67abc6eb03d81e080343971605e185e64da71d9804dd5a556f9001a10f0586",
      "binary": "cp"
    }
  },
  "cases": [
    {
      "workload": "large-file",
      "tool": "syq",
      "bytes": 8589934592,
      "files": 1,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 4.372827911749482,
          "user_s": 14.634704,
          "sys_s": 105.972674,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 4.3725314531475306,
          "user_s": 14.790749999999974,
          "sys_s": 104.659696,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 4.372154800221324,
          "user_s": 14.86196799999999,
          "sys_s": 113.34041399999995,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "large-file",
      "tool": "syq-j32",
      "bytes": 8589934592,
      "files": 1,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 4.222773600369692,
          "user_s": 15.405200999999998,
          "sys_s": 102.677785,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 4.17210291698575,
          "user_s": 15.264726000000024,
          "sys_s": 98.437161,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 4.322231717407703,
          "user_s": 15.08335199999999,
          "sys_s": 109.27423999999996,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "large-file",
      "tool": "rsync",
      "bytes": 8589934592,
      "files": 1,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 12.28766344115138,
          "user_s": 1.5930759999999964,
          "sys_s": 7.804649000000012,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 12.335439331829548,
          "user_s": 1.5969589999999982,
          "sys_s": 7.849463000000014,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 12.33566321618855,
          "user_s": 1.4423369999999522,
          "sys_s": 8.00994499999996,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "large-file",
      "tool": "cp",
      "bytes": 8589934592,
      "files": 1,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 8.029163176193833,
          "user_s": 0.01588800000001811,
          "sys_s": 4.731808000000001,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 8.07967103086412,
          "user_s": 0.009356999999994287,
          "sys_s": 4.763512999999989,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 8.02901896648109,
          "user_s": 0.008383999999978187,
          "sys_s": 4.763191000000006,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "mixed-tree",
      "tool": "syq",
      "bytes": 8589934592,
      "files": 8000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 2.9193792287260294,
          "user_s": 0.6546060000000011,
          "sys_s": 11.178095999999982,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 2.9197953529655933,
          "user_s": 0.6411110000000235,
          "sys_s": 11.399237999999968,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 2.918070362880826,
          "user_s": 0.5757639999999355,
          "sys_s": 11.445679000000041,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "mixed-tree",
      "tool": "syq-j32",
      "bytes": 8589934592,
      "files": 8000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 2.8688004799187183,
          "user_s": 0.7547859999999673,
          "sys_s": 11.491206999999918,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 2.91935214959085,
          "user_s": 0.5468990000000531,
          "sys_s": 11.658124999999927,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 2.919052191078663,
          "user_s": 0.7186249999999745,
          "sys_s": 11.364860000000022,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "mixed-tree",
      "tool": "rsync",
      "bytes": 8589934592,
      "files": 8000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 15.691403079777956,
          "user_s": 1.630925999999988,
          "sys_s": 8.388529000000062,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 15.741255749017,
          "user_s": 1.520481000000018,
          "sys_s": 8.558720999999991,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 15.740769855678082,
          "user_s": 1.7230729999999994,
          "sys_s": 8.342467000000056,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "mixed-tree",
      "tool": "cp",
      "bytes": 8589934592,
      "files": 8000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 12.084992473945022,
          "user_s": 0.024321000000043114,
          "sys_s": 5.063968999999929,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 12.135241102427244,
          "user_s": 0.01266499999996995,
          "sys_s": 5.113356999999951,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 12.084921007975936,
          "user_s": 0.050703999999996086,
          "sys_s": 5.051214000000073,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "small-files",
      "tool": "syq",
      "bytes": 838800000,
      "files": 200000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 5.622707998380065,
          "user_s": 6.932375999999977,
          "sys_s": 58.75384999999994,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 4.6717888712883,
          "user_s": 6.91648500000008,
          "sys_s": 67.04148299999997,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 4.721286345273256,
          "user_s": 6.858427000000006,
          "sys_s": 66.64375500000006,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "small-files",
      "tool": "syq-j32",
      "bytes": 838800000,
      "files": 200000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 5.572793480008841,
          "user_s": 6.769834999999944,
          "sys_s": 59.14254100000005,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 4.921521123498678,
          "user_s": 6.798181999999997,
          "sys_s": 63.52965300000005,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 5.77261864207685,
          "user_s": 6.875524999999925,
          "sys_s": 55.91426200000001,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "small-files",
      "tool": "rsync",
      "bytes": 838800000,
      "files": 200000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 37.92658560164273,
          "user_s": 0.7650979999999663,
          "sys_s": 7.355336000000079,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 38.07562888413668,
          "user_s": 0.8721020000000408,
          "sys_s": 7.282813999999917,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 38.12637931853533,
          "user_s": 0.857923000000028,
          "sys_s": 7.3491200000000845,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    },
    {
      "workload": "small-files",
      "tool": "cp",
      "bytes": 838800000,
      "files": 200000,
      "source_fs": "ext2/ext3",
      "mode": "fresh",
      "prepopulated_with": null,
      "too_short": false,
      "source": "/path/to/empty-source-scratch",
      "error": null,
      "skipped": null,
      "curtailed": null,
      "repeats": [
        {
          "index": 0,
          "wall_s": 42.33328950032592,
          "user_s": 0.3031310000000076,
          "sys_s": 5.054529000000002,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 1,
          "wall_s": 42.28361235000193,
          "user_s": 0.24660199999993893,
          "sys_s": 5.036577000000079,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        },
        {
          "index": 2,
          "wall_s": 42.23272714018822,
          "user_s": 0.2857760000000553,
          "sys_s": 5.014664000000039,
          "exit_code": 0,
          "verified": true,
          "fsync_s": null,
          "cache": "evict",
          "metadata_cache": "warm",
          "changed_files": 0,
          "changed_bytes": 0,
          "delta_seed": null,
          "fsync_note": "not requested"
        }
      ]
    }
  ],
  "probes": [],
  "uncontrolled": [
    "metadata cache (dentries/inodes) is not evicted: generation, checksum, and repeats all warm it",
    "Shared host activity not reserved by OS; untimed before/after resource snapshots retained.",
    "Metadata caches warm; data cache preparation recorded per repeat; no global eviction.",
    "No final flush requested; command completion does not establish durability or physical device throughput.",
    "Logical throughput is not physical disk, network or DRAM traffic.",
    "GNU time wrapper is timed; maximum process RSS is not aggregate simultaneous memory.",
    "Clean runs have no debug tracing or concurrent diagnostic sampler; setup snapshots are untimed."
  ],
  "network": null,
  "publication": {
    "syq_revision": "fd2b17c642e62d7ee63f7f3835560a6ceacd0afb",
    "build_type": "release source build",
    "release": "0.5.2",
    "harness_revision": "a81f64898a1080f7dceba0d05a6b4a919f8211c5",
    "manual_recipe": "specs/release-052/private-ext4-xfs-cross.toml",
    "environment": {
      "kernel": "5.15.0-126-generic",
      "versions": {
        "syq": "syq 0.5.2",
        "syq-j32": "syq 0.5.2",
        "rsync": "rsync  version 3.2.7  protocol version 31",
        "cp": "cp (GNU coreutils) 8.32"
      },
      "allowed_cpus": 160,
      "governors": [
        "performance"
      ],
      "cpu_model": "Intel(R) Xeon(R) Platinum 8460Y+"
    },
    "path_filesystems": {
      "source": "ext4",
      "destination": "xfs"
    },
    "source_build_sha256": "da584b363640f2757f485058103c4be5f906fd8f7fd7e5d582bbcfd98a9ca1ef",
    "selection_note": "Charts omit entire workloads if any tool is incomplete, unverified, cache preparation failed, or any repeat is under three seconds. Omitted cases remain in this capture."
  }
}