{
  "measured_at": "2026-10-14",
  "environment": "v349 Workspace guests; /workspace Writeback and /tmp rootfs Unsafe, both node-local ext4. Guest direct reads bypass guest cache only.",
  "metrics_case": "64mib-free",
  "guest_cases": {
    "1mib-free": {
      "rows": 160,
      "rounds": 5
    },
    "64mib-free": {
      "rows": 160,
      "rounds": 5
    },
    "256mib-power": {
      "rows": 160,
      "rounds": 5
    },
    "1024mib-power": {
      "rows": 160,
      "rounds": 5
    }
  },
  "metrics_by_case": {
    "1mib-free": {
      "persistent": {
        "seq_write_mbps": {
          "median": 102.222,
          "p50": 102.222,
          "p90": null,
          "min": 75.007,
          "max": 131.051,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 637.699,
          "p50": 637.699,
          "p90": null,
          "min": 566.866,
          "max": 681.18,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 972.295,
          "p50": 972.295,
          "p90": null,
          "min": 802.384,
          "max": 1055.823,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1029.926,
          "p50": 1029.926,
          "p90": null,
          "min": 1015.681,
          "max": 1032.667,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.882,
          "p50": 0.882,
          "p90": null,
          "min": 0.78,
          "max": 0.91,
          "n": 5
        },
        "small_delete_ms": {
          "median": 5.878,
          "p50": 5.878,
          "p90": null,
          "min": 4.204,
          "max": 7.506,
          "n": 5
        }
      },
      "ephemeral": {
        "seq_write_mbps": {
          "median": 159.942,
          "p50": 159.942,
          "p90": null,
          "min": 148.414,
          "max": 554.534,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 702.208,
          "p50": 702.208,
          "p90": null,
          "min": 537.929,
          "max": 727.327,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 1043.814,
          "p50": 1043.814,
          "p90": null,
          "min": 989.549,
          "max": 1077.109,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1212.366,
          "p50": 1212.366,
          "p90": null,
          "min": 1189.841,
          "max": 1283.242,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.856,
          "p50": 0.856,
          "p90": null,
          "min": 0.807,
          "max": 0.9,
          "n": 5
        },
        "small_delete_ms": {
          "median": 3.499,
          "p50": 3.499,
          "p90": null,
          "min": 3.33,
          "max": 4.406,
          "n": 5
        }
      }
    },
    "64mib-free": {
      "persistent": {
        "seq_write_mbps": {
          "median": 180.676,
          "p50": 180.676,
          "p90": null,
          "min": 30.53,
          "max": 185.452,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 1538.732,
          "p50": 1538.732,
          "p90": null,
          "min": 1371.166,
          "max": 1964.096,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 20999.16,
          "p50": 20999.16,
          "p90": null,
          "min": 5245.915,
          "max": 21582.146,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1038.062,
          "p50": 1038.062,
          "p90": null,
          "min": 172.338,
          "max": 1051.045,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.801,
          "p50": 0.801,
          "p90": null,
          "min": 0.797,
          "max": 1.157,
          "n": 5
        },
        "small_delete_ms": {
          "median": 5.189,
          "p50": 5.189,
          "p90": null,
          "min": 3.892,
          "max": 28.789,
          "n": 5
        }
      },
      "ephemeral": {
        "seq_write_mbps": {
          "median": 1451.187,
          "p50": 1451.187,
          "p90": null,
          "min": 91.971,
          "max": 1795.52,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 1496.787,
          "p50": 1496.787,
          "p90": null,
          "min": 720.664,
          "max": 1762.449,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 20132.987,
          "p50": 20132.987,
          "p90": null,
          "min": 12361.837,
          "max": 22277.674,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 773.1,
          "p50": 773.1,
          "p90": null,
          "min": 672.223,
          "max": 1252.719,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.968,
          "p50": 0.968,
          "p90": null,
          "min": 0.771,
          "max": 1.285,
          "n": 5
        },
        "small_delete_ms": {
          "median": 3.536,
          "p50": 3.536,
          "p90": null,
          "min": 3.283,
          "max": 6.511,
          "n": 5
        }
      }
    },
    "256mib-power": {
      "persistent": {
        "seq_write_mbps": {
          "median": 184.735,
          "p50": 184.735,
          "p90": null,
          "min": 163.89,
          "max": 189.32,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 1782.656,
          "p50": 1782.656,
          "p90": null,
          "min": 1552.433,
          "max": 1906.975,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 29663.225,
          "p50": 29663.225,
          "p90": null,
          "min": 27249.26,
          "max": 31025.017,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1025.54,
          "p50": 1025.54,
          "p90": null,
          "min": 1017.703,
          "max": 1042.335,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.786,
          "p50": 0.786,
          "p90": null,
          "min": 0.763,
          "max": 0.858,
          "n": 5
        },
        "small_delete_ms": {
          "median": 3.955,
          "p50": 3.955,
          "p90": null,
          "min": 3.695,
          "max": 6.121,
          "n": 5
        }
      },
      "ephemeral": {
        "seq_write_mbps": {
          "median": 1805.388,
          "p50": 1805.388,
          "p90": null,
          "min": 1126.958,
          "max": 2254.858,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 1876.315,
          "p50": 1876.315,
          "p90": null,
          "min": 1519.249,
          "max": 2033.827,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 30377.531,
          "p50": 30377.531,
          "p90": null,
          "min": 28072.683,
          "max": 30720.3,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1309.666,
          "p50": 1309.666,
          "p90": null,
          "min": 892.136,
          "max": 1337.178,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.897,
          "p50": 0.897,
          "p90": null,
          "min": 0.802,
          "max": 0.99,
          "n": 5
        },
        "small_delete_ms": {
          "median": 3.328,
          "p50": 3.328,
          "p90": null,
          "min": 3.26,
          "max": 5.428,
          "n": 5
        }
      }
    },
    "1024mib-power": {
      "persistent": {
        "seq_write_mbps": {
          "median": 180.207,
          "p50": 180.207,
          "p90": null,
          "min": 102.346,
          "max": 263.698,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 1141.361,
          "p50": 1141.361,
          "p90": null,
          "min": 1042.871,
          "max": 1259.251,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 1423.662,
          "p50": 1423.662,
          "p90": null,
          "min": 847.091,
          "max": 1800.384,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1032.468,
          "p50": 1032.468,
          "p90": null,
          "min": 947.826,
          "max": 1051.616,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.902,
          "p50": 0.902,
          "p90": null,
          "min": 0.812,
          "max": 0.954,
          "n": 5
        },
        "small_delete_ms": {
          "median": 4.207,
          "p50": 4.207,
          "p90": null,
          "min": 3.766,
          "max": 7.474,
          "n": 5
        }
      },
      "ephemeral": {
        "seq_write_mbps": {
          "median": 346.952,
          "p50": 346.952,
          "p90": null,
          "min": 273.383,
          "max": 537.138,
          "n": 5
        },
        "seq_read_direct_mbps": {
          "median": 894.634,
          "p50": 894.634,
          "p90": null,
          "min": 639.395,
          "max": 1675.897,
          "n": 5
        },
        "seq_read_warm_mbps": {
          "median": 1288.899,
          "p50": 1288.899,
          "p90": null,
          "min": 1101.839,
          "max": 1574.787,
          "n": 5
        },
        "small_create_files_per_s": {
          "median": 1304.13,
          "p50": 1304.13,
          "p90": null,
          "min": 1181.649,
          "max": 1305.886,
          "n": 5
        },
        "small_walk_ms": {
          "median": 0.877,
          "p50": 0.877,
          "p90": null,
          "min": 0.791,
          "max": 1.083,
          "n": 5
        },
        "small_delete_ms": {
          "median": 3.979,
          "p50": 3.979,
          "p90": null,
          "min": 3.68,
          "max": 5.338,
          "n": 5
        }
      }
    }
  },
  "rounds": 5,
  "small_files": 500,
  "small_file_bytes": 4096,
  "metrics": {
    "small_create_files_per_s": {
      "persistent": {
        "median": 1038.062,
        "p50": 1038.062,
        "p90": null,
        "min": 172.338,
        "max": 1051.045,
        "n": 5
      },
      "ephemeral": {
        "median": 773.1,
        "p50": 773.1,
        "p90": null,
        "min": 672.223,
        "max": 1252.719,
        "n": 5
      },
      "ratio": 0.745,
      "higher_is_better": true
    },
    "small_walk_ms": {
      "persistent": {
        "median": 0.801,
        "p50": 0.801,
        "p90": null,
        "min": 0.797,
        "max": 1.157,
        "n": 5
      },
      "ephemeral": {
        "median": 0.968,
        "p50": 0.968,
        "p90": null,
        "min": 0.771,
        "max": 1.285,
        "n": 5
      },
      "ratio": 0.827,
      "higher_is_better": false
    },
    "small_delete_ms": {
      "persistent": {
        "median": 5.189,
        "p50": 5.189,
        "p90": null,
        "min": 3.892,
        "max": 28.789,
        "n": 5
      },
      "ephemeral": {
        "median": 3.536,
        "p50": 3.536,
        "p90": null,
        "min": 3.283,
        "max": 6.511,
        "n": 5
      },
      "ratio": 1.467,
      "higher_is_better": false
    },
    "seq_write_mbps": {
      "persistent": {
        "median": 180.676,
        "p50": 180.676,
        "p90": null,
        "min": 30.53,
        "max": 185.452,
        "n": 5
      },
      "ephemeral": {
        "median": 1451.187,
        "p50": 1451.187,
        "p90": null,
        "min": 91.971,
        "max": 1795.52,
        "n": 5
      },
      "ratio": 8.032,
      "higher_is_better": true
    },
    "seq_read_direct_mbps": {
      "persistent": {
        "median": 1538.732,
        "p50": 1538.732,
        "p90": null,
        "min": 1371.166,
        "max": 1964.096,
        "n": 5
      },
      "ephemeral": {
        "median": 1496.787,
        "p50": 1496.787,
        "p90": null,
        "min": 720.664,
        "max": 1762.449,
        "n": 5
      },
      "ratio": 0.973,
      "higher_is_better": true
    },
    "seq_read_warm_mbps": {
      "persistent": {
        "median": 20999.16,
        "p50": 20999.16,
        "p90": null,
        "min": 5245.915,
        "max": 21582.146,
        "n": 5
      },
      "ephemeral": {
        "median": 20132.987,
        "p50": 20132.987,
        "p90": null,
        "min": 12361.837,
        "max": 22277.674,
        "n": 5
      },
      "ratio": 0.959,
      "higher_is_better": true
    }
  },
  "save": {
    "1": {
      "plan": "free",
      "added_bytes": {
        "median": 1053760,
        "p50": 1053760,
        "p90": null,
        "min": 1053760,
        "max": 1076168,
        "n": 5
      },
      "ended_to_ready_ms": {
        "median": 1769,
        "p50": 1769,
        "p90": null,
        "min": 1627,
        "max": 1851,
        "n": 5
      },
      "save_total_ms": {
        "median": 1865,
        "p50": 1865,
        "p90": null,
        "min": 1734,
        "max": 1989,
        "n": 5
      },
      "phases_ms": {
        "accept": {
          "median": 56,
          "p50": 56,
          "p90": null,
          "min": 27,
          "max": 59,
          "n": 5
        },
        "admit": {
          "median": 30,
          "p50": 30,
          "p90": null,
          "min": 22,
          "max": 38,
          "n": 5
        },
        "clone": {
          "median": 72,
          "p50": 72,
          "p90": null,
          "min": 62,
          "max": 82,
          "n": 5
        },
        "commit": {
          "median": 29,
          "p50": 29,
          "p90": null,
          "min": 21,
          "max": 45,
          "n": 5
        },
        "completion_claim": {
          "median": 1,
          "p50": 1,
          "p90": null,
          "min": 1,
          "max": 31,
          "n": 5
        },
        "helper": {
          "median": 1449,
          "p50": 1449,
          "p90": null,
          "min": 1281,
          "max": 1536,
          "n": 5
        },
        "helper_fsck": {
          "median": 33,
          "p50": 33,
          "p90": null,
          "min": 29,
          "max": 34,
          "n": 5
        },
        "helper_restic": {
          "median": 479,
          "p50": 479,
          "p90": null,
          "min": 456,
          "max": 520,
          "n": 5
        },
        "helper_scan": {
          "median": 8,
          "p50": 8,
          "p90": null,
          "min": 6,
          "max": 10,
          "n": 5
        },
        "helper_total": {
          "median": 873,
          "p50": 873,
          "p90": null,
          "min": 843,
          "max": 908,
          "n": 5
        },
        "parallel_head_verify": {
          "median": 281,
          "p50": 281,
          "p90": null,
          "min": 232,
          "max": 296,
          "n": 5
        },
        "parallel_public_twin": {
          "median": 152,
          "p50": 152,
          "p90": null,
          "min": 118,
          "max": 296,
          "n": 5
        },
        "public_compare": {
          "median": 73,
          "p50": 73,
          "p90": null,
          "min": 47,
          "max": 77,
          "n": 5
        },
        "public_twin": {
          "median": 260,
          "p50": 260,
          "p90": null,
          "min": 203,
          "max": 386,
          "n": 5
        },
        "total": {
          "median": 1865,
          "p50": 1865,
          "p90": null,
          "min": 1734,
          "max": 1989,
          "n": 5
        },
        "verify": {
          "median": 3,
          "p50": 3,
          "p90": null,
          "min": 3,
          "max": 4,
          "n": 5
        },
        "vmd_clone": {
          "median": 2,
          "p50": 2,
          "p90": null,
          "min": 1,
          "max": 2,
          "n": 5
        }
      }
    },
    "64": {
      "plan": "free",
      "added_bytes": {
        "median": 67117199,
        "p50": 67117199,
        "p90": null,
        "min": 67116328,
        "max": 67139414,
        "n": 5
      },
      "ended_to_ready_ms": {
        "median": 4076,
        "p50": 4076,
        "p90": null,
        "min": 3660,
        "max": 4431,
        "n": 5
      },
      "save_total_ms": {
        "median": 4299,
        "p50": 4299,
        "p90": null,
        "min": 3773,
        "max": 5542,
        "n": 5
      },
      "phases_ms": {
        "accept": {
          "median": 58,
          "p50": 58,
          "p90": null,
          "min": 55,
          "max": 510,
          "n": 5
        },
        "admit": {
          "median": 35,
          "p50": 35,
          "p90": null,
          "min": 26,
          "max": 62,
          "n": 5
        },
        "clone": {
          "median": 90,
          "p50": 90,
          "p90": null,
          "min": 65,
          "max": 112,
          "n": 5
        },
        "commit": {
          "median": 35,
          "p50": 35,
          "p90": null,
          "min": 18,
          "max": 906,
          "n": 5
        },
        "completion_claim": {
          "median": 16,
          "p50": 16,
          "p90": null,
          "min": 1,
          "max": 113,
          "n": 5
        },
        "helper": {
          "median": 3483,
          "p50": 3483,
          "p90": null,
          "min": 3322,
          "max": 3813,
          "n": 5
        },
        "helper_fsck": {
          "median": 34,
          "p50": 34,
          "p90": null,
          "min": 29,
          "max": 43,
          "n": 5
        },
        "helper_restic": {
          "median": 2440,
          "p50": 2440,
          "p90": null,
          "min": 2333,
          "max": 2857,
          "n": 5
        },
        "helper_scan": {
          "median": 8,
          "p50": 8,
          "p90": null,
          "min": 7,
          "max": 19,
          "n": 5
        },
        "helper_total": {
          "median": 2860,
          "p50": 2860,
          "p90": null,
          "min": 2721,
          "max": 3274,
          "n": 5
        },
        "parallel_head_verify": {
          "median": 248,
          "p50": 248,
          "p90": null,
          "min": 233,
          "max": 343,
          "n": 5
        },
        "parallel_public_twin": {
          "median": 143,
          "p50": 143,
          "p90": null,
          "min": 122,
          "max": 187,
          "n": 5
        },
        "public_compare": {
          "median": 70,
          "p50": 70,
          "p90": null,
          "min": 52,
          "max": 91,
          "n": 5
        },
        "public_twin": {
          "median": 299,
          "p50": 299,
          "p90": null,
          "min": 227,
          "max": 629,
          "n": 5
        },
        "total": {
          "median": 4299,
          "p50": 4299,
          "p90": null,
          "min": 3773,
          "max": 5542,
          "n": 5
        },
        "verify": {
          "median": 5,
          "p50": 5,
          "p90": null,
          "min": 3,
          "max": 56,
          "n": 5
        },
        "vmd_clone": {
          "median": 2,
          "p50": 2,
          "p90": null,
          "min": 1,
          "max": 3,
          "n": 5
        }
      }
    },
    "256": {
      "plan": "power",
      "added_bytes": {
        "median": 268452240,
        "p50": 268452240,
        "p90": null,
        "min": 268451168,
        "max": 268475255,
        "n": 5
      },
      "ended_to_ready_ms": {
        "median": 8434,
        "p50": 8434,
        "p90": null,
        "min": 7886,
        "max": 9091,
        "n": 5
      },
      "save_total_ms": {
        "median": 8749,
        "p50": 8749,
        "p90": null,
        "min": 7961,
        "max": 9233,
        "n": 5
      },
      "phases_ms": {
        "accept": {
          "median": 62,
          "p50": 62,
          "p90": null,
          "min": 29,
          "max": 243,
          "n": 5
        },
        "admit": {
          "median": 35,
          "p50": 35,
          "p90": null,
          "min": 23,
          "max": 52,
          "n": 5
        },
        "clone": {
          "median": 77,
          "p50": 77,
          "p90": null,
          "min": 68,
          "max": 106,
          "n": 5
        },
        "commit": {
          "median": 28,
          "p50": 28,
          "p90": null,
          "min": 21,
          "max": 266,
          "n": 5
        },
        "completion_claim": {
          "median": 1,
          "p50": 1,
          "p90": null,
          "min": 1,
          "max": 50,
          "n": 5
        },
        "helper": {
          "median": 8136,
          "p50": 8136,
          "p90": null,
          "min": 7553,
          "max": 8708,
          "n": 5
        },
        "helper_fsck": {
          "median": 67,
          "p50": 67,
          "p90": null,
          "min": 62,
          "max": 76,
          "n": 5
        },
        "helper_restic": {
          "median": 6800,
          "p50": 6800,
          "p90": null,
          "min": 6599,
          "max": 7699,
          "n": 5
        },
        "helper_scan": {
          "median": 8,
          "p50": 8,
          "p90": null,
          "min": 7,
          "max": 10,
          "n": 5
        },
        "helper_total": {
          "median": 7294,
          "p50": 7294,
          "p90": null,
          "min": 7019,
          "max": 8121,
          "n": 5
        },
        "parallel_head_verify": {
          "median": 272,
          "p50": 272,
          "p90": null,
          "min": 231,
          "max": 290,
          "n": 5
        },
        "parallel_public_twin": {
          "median": 159,
          "p50": 159,
          "p90": null,
          "min": 125,
          "max": 184,
          "n": 5
        },
        "public_compare": {
          "median": 84,
          "p50": 84,
          "p90": null,
          "min": 54,
          "max": 98,
          "n": 5
        },
        "public_twin": {
          "median": 279,
          "p50": 279,
          "p90": null,
          "min": 206,
          "max": 377,
          "n": 5
        },
        "total": {
          "median": 8749,
          "p50": 8749,
          "p90": null,
          "min": 7961,
          "max": 9233,
          "n": 5
        },
        "verify": {
          "median": 4,
          "p50": 4,
          "p90": null,
          "min": 3,
          "max": 34,
          "n": 5
        },
        "vmd_clone": {
          "median": 2,
          "p50": 2,
          "p90": null,
          "min": 2,
          "max": 4,
          "n": 5
        }
      }
    },
    "1024": {
      "plan": "power",
      "added_bytes": {
        "median": 1073793111,
        "p50": 1073793111,
        "p90": null,
        "min": 1073790768,
        "max": 1073817276,
        "n": 5
      },
      "ended_to_ready_ms": {
        "median": 23042,
        "p50": 23042,
        "p90": null,
        "min": 21582,
        "max": 24882,
        "n": 5
      },
      "save_total_ms": {
        "median": 23198,
        "p50": 23198,
        "p90": null,
        "min": 21690,
        "max": 25019,
        "n": 5
      },
      "phases_ms": {
        "accept": {
          "median": 59,
          "p50": 59,
          "p90": null,
          "min": 44,
          "max": 100,
          "n": 5
        },
        "admit": {
          "median": 32,
          "p50": 32,
          "p90": null,
          "min": 24,
          "max": 36,
          "n": 5
        },
        "clone": {
          "median": 84,
          "p50": 84,
          "p90": null,
          "min": 77,
          "max": 96,
          "n": 5
        },
        "commit": {
          "median": 28,
          "p50": 28,
          "p90": null,
          "min": 24,
          "max": 48,
          "n": 5
        },
        "completion_claim": {
          "median": 3,
          "p50": 3,
          "p90": null,
          "min": 2,
          "max": 6,
          "n": 5
        },
        "helper": {
          "median": 22545,
          "p50": 22545,
          "p90": null,
          "min": 21029,
          "max": 24499,
          "n": 5
        },
        "helper_fsck": {
          "median": 70,
          "p50": 70,
          "p90": null,
          "min": 59,
          "max": 93,
          "n": 5
        },
        "helper_restic": {
          "median": 21605,
          "p50": 21605,
          "p90": null,
          "min": 19888,
          "max": 23422,
          "n": 5
        },
        "helper_scan": {
          "median": 8,
          "p50": 8,
          "p90": null,
          "min": 5,
          "max": 10,
          "n": 5
        },
        "helper_total": {
          "median": 22065,
          "p50": 22065,
          "p90": null,
          "min": 20358,
          "max": 23891,
          "n": 5
        },
        "parallel_head_verify": {
          "median": 349,
          "p50": 349,
          "p90": null,
          "min": 316,
          "max": 414,
          "n": 5
        },
        "parallel_public_twin": {
          "median": 207,
          "p50": 207,
          "p90": null,
          "min": 168,
          "max": 258,
          "n": 5
        },
        "public_compare": {
          "median": 135,
          "p50": 135,
          "p90": null,
          "min": 80,
          "max": 161,
          "n": 5
        },
        "public_twin": {
          "median": 392,
          "p50": 392,
          "p90": null,
          "min": 278,
          "max": 444,
          "n": 5
        },
        "total": {
          "median": 23198,
          "p50": 23198,
          "p90": null,
          "min": 21690,
          "max": 25019,
          "n": 5
        },
        "verify": {
          "median": 4,
          "p50": 4,
          "p90": null,
          "min": 3,
          "max": 6,
          "n": 5
        },
        "vmd_clone": {
          "median": 2,
          "p50": 2,
          "p90": null,
          "min": 2,
          "max": 3,
          "n": 5
        }
      }
    }
  },
  "durable_write": {
    "sizes_mb": [
      1,
      64,
      256,
      1024
    ],
    "mbps": {},
    "headline_size_mb": null,
    "persistent_mbps": null,
    "ephemeral_mbps": null,
    "ratio": null,
    "comparable": false,
    "method": "Durability is measured by post-run restic save. Guest fsync throughput does not include the save."
  },
  "cold_read": {
    "size_mb": null,
    "survived_pod_replacement": null,
    "md5_matches": null,
    "cold_mbps": null,
    "cold_wall_s": null,
    "warm_mbps": null,
    "warm_wall_s": null,
    "method": "No forced restore/miss arm measured."
  },
  "discarded": [],
  "license": "CC BY 4.0",
  "measurement_start_utc": "2026-10-14T12:16:31.786983Z",
  "measurement_end_utc": "2026-10-14T12:42:39.811217628Z",
  "pool_outcomes": {
    "hit": 40
  },
  "run_attempts": 40,
  "save_execution_strata": {
    "1": {
      "1": {
        "added_bytes": {
          "n": 5,
          "p50": 1053760,
          "p90": null,
          "min": 1053760,
          "max": 1076168
        },
        "save_total_ms": {
          "n": 5,
          "p50": 1865,
          "p90": null,
          "min": 1734,
          "max": 1989
        },
        "ended_to_ready_ms": {
          "n": 5,
          "p50": 1769,
          "p90": null,
          "min": 1627,
          "max": 1851
        }
      }
    },
    "64": {
      "1": {
        "added_bytes": {
          "n": 4,
          "p50": null,
          "p90": null,
          "min": 67116328,
          "max": 67139414
        },
        "save_total_ms": {
          "n": 4,
          "p50": null,
          "p90": null,
          "min": 3773,
          "max": 5542
        },
        "ended_to_ready_ms": {
          "n": 4,
          "p50": null,
          "p90": null,
          "min": 3660,
          "max": 4187
        }
      },
      "2": {
        "added_bytes": {
          "n": 1,
          "p50": null,
          "p90": null,
          "min": 67117400,
          "max": 67117400
        },
        "save_total_ms": {
          "n": 1,
          "p50": null,
          "p90": null,
          "min": 5079,
          "max": 5079
        },
        "ended_to_ready_ms": {
          "n": 1,
          "p50": null,
          "p90": null,
          "min": 4431,
          "max": 4431
        }
      }
    },
    "256": {
      "1": {
        "added_bytes": {
          "n": 5,
          "p50": 268452240,
          "p90": null,
          "min": 268451168,
          "max": 268475255
        },
        "save_total_ms": {
          "n": 5,
          "p50": 8749,
          "p90": null,
          "min": 7961,
          "max": 9233
        },
        "ended_to_ready_ms": {
          "n": 5,
          "p50": 8434,
          "p90": null,
          "min": 7886,
          "max": 9091
        }
      }
    },
    "1024": {
      "1": {
        "added_bytes": {
          "n": 3,
          "p50": null,
          "p90": null,
          "min": 1073792309,
          "max": 1073817276
        },
        "save_total_ms": {
          "n": 3,
          "p50": null,
          "p90": null,
          "min": 21791,
          "max": 25019
        },
        "ended_to_ready_ms": {
          "n": 3,
          "p50": null,
          "p90": null,
          "min": 21685,
          "max": 24882
        }
      },
      "2": {
        "added_bytes": {
          "n": 2,
          "p50": null,
          "p90": null,
          "min": 1073790768,
          "max": 1073793111
        },
        "save_total_ms": {
          "n": 2,
          "p50": null,
          "p90": null,
          "min": 21690,
          "max": 23198
        },
        "ended_to_ready_ms": {
          "n": 2,
          "p50": null,
          "p90": null,
          "min": 21582,
          "max": 23042
        }
      }
    }
  },
  "protocol_deviations": [
    {
      "sample": "s12",
      "arm": "save",
      "size_mib": 64,
      "round": 3,
      "script_executions": 2,
      "reason": "model repeated the identical script; final saved output retained"
    },
    {
      "sample": "s14",
      "arm": "save",
      "size_mib": 1024,
      "round": 4,
      "script_executions": 2,
      "reason": "model repeated the identical script; final saved output retained"
    },
    {
      "sample": "s14",
      "arm": "save",
      "size_mib": 1024,
      "round": 5,
      "script_executions": 2,
      "reason": "model repeated the identical script; final saved output retained"
    },
    {
      "sample": "s18",
      "arm": "tiers",
      "size_mib": 1024,
      "round": 1,
      "script_executions": 1,
      "reason": "model appended an exit-status echo; exit=0 verified"
    }
  ],
  "workspace_write_64_mib": [
    180.676,
    185.452,
    184.73,
    30.53,
    59.849
  ]
}