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     },
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 "classification": "MEASURED on the live multi-region cluster cain-mr-02 during a two-replica storage-loss drill",
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   "cain-mr2-node-4": 12
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  "rpo_decisions_lost": 0,
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 "generated_at": "2026-09-27T02:24:30Z",
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        }
       },
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     "prepare_qc": {
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        },
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             "resource": "first/1"
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            "request_id": "first-1",
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          },
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        },
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          },
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        }
       },
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    {
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        },
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        },
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        },
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          },
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        },
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     },
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     "prepare_qc": {
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        }
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        },
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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          },
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         "timestamp": 1790475776.540399,
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        },
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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        },
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        },
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        },
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          },
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          },
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          },
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        }
       },
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        },
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        }
       },
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       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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     },
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    {
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        },
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        },
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        },
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        }
       },
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       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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             },
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        },
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     },
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        },
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        }
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     },
     "prepare_qc": {
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             "data": {
              "rid": "mdr022241-after-backup-0"
             },
             "resource": "dr/mdr022241-after-backup-0"
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           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790475776.4405115,
           "view": 4
          },
          "pre_prepare_digest": "f928d202392e75186a639c407acbe91a1f6c9b2846edff0ff3173cf03af11b54"
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         "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
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         "signature_b64": "/NfndZjV78L0QqLriLNWA1Ch1/1776oAzpMnLsqW+aX94uYeIKVqt2jkdzmAY92/Wy/APvauZ7SVV7i63h0RAQ==",
         "timestamp": 1790475776.540399,
         "view": 4
        },
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        },
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        }
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          },
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         "timestamp": 1790467609.4901187,
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        },
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        },
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        },
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         "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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         "timestamp": 1790470346.154221,
         "view": 4
        }
       },
       "signer_set": [
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      "cluster_id": "cain-mr-02",
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             },
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790473082.2261755,
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         "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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     },
     "prepare_qc": {
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        },
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        }
       },
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       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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       "timestamp": 1790474882.0690343,
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      },
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     },
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    },
    {
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         "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
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         "signature_b64": "H2RaCcjP+gwuTz2kj4MQBdLcPmrrXOTRKqzQQVSfbadOBWE/3ZFxSEB00f4OvCo70YugcRxMMkBgbLUubgyUAQ==",
         "timestamp": 1790475776.5853775,
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        },
        "cain-mr2-node-3": {
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        },
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        },
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        }
       },
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       "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
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           "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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        },
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       },
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        },
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        },
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        },
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        },
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           "timestamp": 1790467611.4174676,
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     },
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        },
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        },
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         "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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         "timestamp": 1790470158.8951695,
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        },
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        }
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             },
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           "timestamp": 1790470346.0659661,
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          },
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         "sender_id": "cain-mr2-node-2",
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         "timestamp": 1790470346.196138,
         "view": 4
        },
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             },
             "resource": "hourly/hourly-20260927T005226Z"
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           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790470346.0659661,
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             },
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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         "timestamp": 1790473082.3101497,
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        },
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     },
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    {
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        "cain-mr2-node-3": {
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         "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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        }
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     },
     "prepare_qc": {
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             },
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790474882.0690343,
           "view": 4
          },
          "pre_prepare_digest": "ed29406be3f7f35a9fe8360026d880c7ff98c19a9b043aca29818ff5851fc1f5"
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         "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
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         "sender_id": "cain-mr2-node-2",
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         "timestamp": 1790474882.214062,
         "view": 4
        },
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         "nonce": "ce11d99c818948c38a4e946ca5eaad50",
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             },
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           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "sender_id": "cain-mr2-node-1",
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           "timestamp": 1790474882.0690343,
           "view": 4
          },
          "pre_prepare_digest": "ed29406be3f7f35a9fe8360026d880c7ff98c19a9b043aca29818ff5851fc1f5"
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         "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
         "request_digest": "b972ea70c31505a2b97ab512cfa652928811c9004f7e0e8d2640fc12818cfc8e",
         "sender_id": "cain-mr2-node-4",
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         "signature_b64": "okBfz3KuRrA0+xblkLNg6CGUomLp2UXevVfx37s1rUZ5Gkgg2dbKd/QIe6xJlkJbEQOJQQoKMhiq+4SZowF1Dw==",
         "timestamp": 1790474882.2301872,
         "view": 4
        }
       },
       "signer_set": [
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      },
      "bundle_hash": "534ab7e32c64442f493a31cae9c2891fd24ea5762974d7582bf38adc3128a10d",
      "certificate_hash": "072f5c991530a2cbe1139072d50a8a0d9d835da60c4e3eb3ecf6b5b43fd70373",
      "certificate_type": "PREPARE_QC",
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       "nonce": "8797da5eb68e443395a12360254eb47d",
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         },
         "resource": "hourly/hourly-20260927T020801Z"
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        "request_id": "hourly-20260927T020801Z",
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       },
       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
       "request_digest": "b972ea70c31505a2b97ab512cfa652928811c9004f7e0e8d2640fc12818cfc8e",
       "sender_id": "cain-mr2-node-1",
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       "timestamp": 1790474882.0690343,
       "view": 4
      },
      "leader_proposal_digest": "ed29406be3f7f35a9fe8360026d880c7ff98c19a9b043aca29818ff5851fc1f5",
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      "quorum": 3,
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     },
     "sequence": 38
    },
    {
     "commit_qc": {
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       "aggregation_algorithm": "ed25519-individual",
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       "individual_signatures": {
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         "nonce": "e282f349f4cc4d1eaf261d406b6ddb95",
         "payload": {
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          "state_root_claim": "5c1a17a0492f8008b74f6fdca003389408d113c74d98dc23fceaac95450554c0"
         },
         "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
         "request_digest": "1d375ae7b788bac3ea30f977022dd529e373670e9411918040bb32f6cf983e7a",
         "sender_id": "cain-mr2-node-1",
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         "signature_b64": "JJXants6Eh2HrmVTlErHyU4WSRZiEuKLicJG1BQXUFQmRf+X5xvr31aH9lMf0peNBeEk6DffmwWTBHKKQf/mBA==",
         "timestamp": 1790475776.5846088,
         "view": 4
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         "nonce": "88d37293ec55457d83257c32b07e38f6",
         "payload": {
          "prepared_cert_hash": "e9ed3fb7c93fe4d627e83adf70bb51deb9a523c3c13547203482a23d2d996d44",
          "state_root_claim": "c6b72b038bec97cc34be1080125a76df82058b32aedba9b273cb94f0a6d4d045"
         },
         "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
         "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
         "sender_id": "cain-mr2-node-2",
         "sequence": 52,
         "signature_b64": "Dq/tmKrTpYgAJfEaOqCMge16XTzGsWQv37UCKENyXi95Lx12VGB2UZWeuB0OEB5VYs0iydjwY447D9bgSzN8Cw==",
         "timestamp": 1790475845.4988642,
         "view": 5
        },
        "cain-mr2-node-4": {
         "cluster_id": "cain-mr-02",
         "engine_version": "33.4-production-hardened",
         "epoch": 1,
         "msg_type": "COMMIT",
         "nonce": "18011583aa144867a27a9a1538309d2d",
         "payload": {
          "prepared_cert_hash": "1847a9f96bd4717c078985308d3a3cfe0b9d9e452283b4a35c1fa3c5d262c5a3",
          "state_root_claim": "c6b72b038bec97cc34be1080125a76df82058b32aedba9b273cb94f0a6d4d045"
         },
         "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
         "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
         "sender_id": "cain-mr2-node-4",
         "sequence": 52,
         "signature_b64": "4cib+4LXAfvsGpKIi1NaoBKM46qffPP+tHLs1JT21Op64LYfhPdRhrbz38AjW2D/WtdCZxJ+I+iGGKu/+xwEDQ==",
         "timestamp": 1790475846.2991958,
         "view": 5
        }
       },
       "signer_set": [
        "cain-mr2-node-1",
        "cain-mr2-node-2",
        "cain-mr2-node-4"
       ]
      },
      "bundle_hash": "e54a749e22f3c869ec2971eb7ef18c1e6815f6c95ac8c0baf2e01310fff1d2c1",
      "certificate_hash": "2f418675c96393bec94914b184e63a8ec6226c933de02f97ee1ea2e6dfd85508",
      "certificate_type": "COMMIT_QC",
      "cluster_id": "cain-mr-02",
      "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
      "decision_hash": "a8dfd92cfb4b22181d44202d3b9ae9a18b7cf9c8eee86baa58c34dd3197a2bc7",
      "epoch": 1,
      "leader_proposal": null,
      "leader_proposal_digest": null,
      "parent_decision_hash": "ed5411fb0708c871cb59d84b8f9a2bf6f7289753745fdfb448cceb03fd522d2e",
      "proposal_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
      "quorum": 3,
      "quorum_policy": {
       "f": 1,
       "n": 4,
       "quorum": 3,
       "rule": "ceil((N+f+1)/2)"
      },
      "quorum_policy_hash": "13d05661a0b1d519909ca36ee4c21be59adc1384a0a7da6d906dc5248e86130c",
      "sequence": 52,
      "signer_set": [
       "cain-mr2-node-1",
       "cain-mr2-node-2",
       "cain-mr2-node-4"
      ],
      "view": 5
     },
     "prepare_qc": {
      "bundle": {
       "aggregate_signature": null,
       "aggregation_algorithm": "ed25519-individual",
       "algorithm_version": 1,
       "bundle_hash": "cd0f80f22442d1358b7dcc0e91b4717fe9b991b9c3de688d1b21ad79791a504d",
       "individual_signatures": {
        "cain-mr2-node-1": {
         "cluster_id": "cain-mr-02",
         "engine_version": "33.4-production-hardened",
         "epoch": 1,
         "msg_type": "PREPARE",
         "nonce": "0ba90f10a84b46c19106cbce1f01ccc0",
         "payload": {
          "pre_prepare": {
           "cluster_id": "cain-mr-02",
           "engine_version": "33.4-production-hardened",
           "epoch": 1,
           "msg_type": "PRE_PREPARE",
           "nonce": "743887814f004a5d8666e5e169d12f70",
           "payload": {
            "client_id": "multi-loss-drill",
            "operation": {
             "action": "write",
             "data": {
              "rid": "mdr022241-during-2"
             },
             "resource": "dr/mdr022241-during-2"
            },
            "request_id": "mdr022241-during-2",
            "requested_authority": "standard"
           },
           "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
           "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
           "sender_id": "cain-mr2-node-2",
           "sequence": 52,
           "signature_b64": "T7+AgZ7OjaO6dMqDvQPRibjBQhjWXmIUf2lHrlzADgOe4RyDgJ/3rXraTxI8lvXHc8I3YcVz0wOGWrIBFlSiDw==",
           "timestamp": 1790475845.3666224,
           "view": 5
          },
          "pre_prepare_digest": "c49e61bba258c99f74de1879bb1c9e02e500d377d16690d383275d4e03377fb6"
         },
         "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
         "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
         "sender_id": "cain-mr2-node-1",
         "sequence": 52,
         "signature_b64": "FfLSjPSLdhixcU7XmpM46/bFVQtOo5Hs/n3C/ZD7n03Psc/FaSJJ4dreiXvj13ygioDA6X6+SNUF4vOTR6NhCg==",
         "timestamp": 1790475845.4258418,
         "view": 5
        },
        "cain-mr2-node-4": {
         "cluster_id": "cain-mr-02",
         "engine_version": "33.4-production-hardened",
         "epoch": 1,
         "msg_type": "PREPARE",
         "nonce": "326456fab72f460f813b2c381be4e5dd",
         "payload": {
          "pre_prepare": {
           "cluster_id": "cain-mr-02",
           "engine_version": "33.4-production-hardened",
           "epoch": 1,
           "msg_type": "PRE_PREPARE",
           "nonce": "743887814f004a5d8666e5e169d12f70",
           "payload": {
            "client_id": "multi-loss-drill",
            "operation": {
             "action": "write",
             "data": {
              "rid": "mdr022241-during-2"
             },
             "resource": "dr/mdr022241-during-2"
            },
            "request_id": "mdr022241-during-2",
            "requested_authority": "standard"
           },
           "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
           "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
           "sender_id": "cain-mr2-node-2",
           "sequence": 52,
           "signature_b64": "T7+AgZ7OjaO6dMqDvQPRibjBQhjWXmIUf2lHrlzADgOe4RyDgJ/3rXraTxI8lvXHc8I3YcVz0wOGWrIBFlSiDw==",
           "timestamp": 1790475845.3666224,
           "view": 5
          },
          "pre_prepare_digest": "c49e61bba258c99f74de1879bb1c9e02e500d377d16690d383275d4e03377fb6"
         },
         "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
         "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
         "sender_id": "cain-mr2-node-4",
         "sequence": 52,
         "signature_b64": "FZYurH7e3honLcBzjcVvLze340pdYH9hsn6tl4qR/7CVf9gSN6e3FcCqk8DOypeeHbpOar9F7nJEX0jQ7WxSAw==",
         "timestamp": 1790475846.266307,
         "view": 5
        }
       },
       "signer_set": [
        "cain-mr2-node-1",
        "cain-mr2-node-4"
       ]
      },
      "bundle_hash": "cd0f80f22442d1358b7dcc0e91b4717fe9b991b9c3de688d1b21ad79791a504d",
      "certificate_hash": "02f6d7be061e5f55b9c075dadcb31eebdee720e253e08223a1bdc6cc9e7d8120",
      "certificate_type": "PREPARE_QC",
      "cluster_id": "cain-mr-02",
      "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
      "decision_hash": "a8dfd92cfb4b22181d44202d3b9ae9a18b7cf9c8eee86baa58c34dd3197a2bc7",
      "epoch": 1,
      "leader_proposal": {
       "cluster_id": "cain-mr-02",
       "engine_version": "33.4-production-hardened",
       "epoch": 1,
       "msg_type": "PRE_PREPARE",
       "nonce": "743887814f004a5d8666e5e169d12f70",
       "payload": {
        "client_id": "multi-loss-drill",
        "operation": {
         "action": "write",
         "data": {
          "rid": "mdr022241-during-2"
         },
         "resource": "dr/mdr022241-during-2"
        },
        "request_id": "mdr022241-during-2",
        "requested_authority": "standard"
       },
       "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
       "request_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
       "sender_id": "cain-mr2-node-2",
       "sequence": 52,
       "signature_b64": "T7+AgZ7OjaO6dMqDvQPRibjBQhjWXmIUf2lHrlzADgOe4RyDgJ/3rXraTxI8lvXHc8I3YcVz0wOGWrIBFlSiDw==",
       "timestamp": 1790475845.3666224,
       "view": 5
      },
      "leader_proposal_digest": "c49e61bba258c99f74de1879bb1c9e02e500d377d16690d383275d4e03377fb6",
      "parent_decision_hash": "ed5411fb0708c871cb59d84b8f9a2bf6f7289753745fdfb448cceb03fd522d2e",
      "proposal_digest": "1dc13a7b02ad0b8c71cc93eb53619dce5eb5877c5882a6b71922ebd23849b51d",
      "quorum": 3,
      "quorum_policy": {
       "f": 1,
       "n": 4,
       "quorum": 3,
       "rule": "ceil((N+f+1)/2)"
      },
      "quorum_policy_hash": "13d05661a0b1d519909ca36ee4c21be59adc1384a0a7da6d906dc5248e86130c",
      "sequence": 52,
      "signer_set": [
       "cain-mr2-node-1",
       "cain-mr2-node-4"
      ],
      "view": 5
     },
     "sequence": 52
    }
   ],
   "commit_index": 52,
   "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
   "fast_commits": 0,
   "head_decision_hash": "a8dfd92cfb4b22181d44202d3b9ae9a18b7cf9c8eee86baa58c34dd3197a2bc7",
   "membership_key_source": "CONFIGURED",
   "view": 5
  }
 },
 "not_claimed": [
  "loss of three or more replicas (beyond f=1; not safe to recover from backups, not drilled)",
  "backups on another provider (the off-host copies are on other Vultr regions)",
  "loss of the identity key (kept on host; would come from the operator's secret store)",
  "encryption at rest of the backups",
  "independent operators or providers",
  "third-party review",
  "absence of bugs"
 ],
 "run_log": [
  {
   "event": "backup 20260927T022241Z of all 4 replicas, copied off-host (OK); cain-mr2-node-3 at height 38, cain-mr2-node-4 at height 38",
   "t": 1790475776.398
  },
  {
   "event": "12/12 writes after the backup; cluster at 50 (backups are 12-12 decisions behind)",
   "t": 1790475782.895
  },
  {
   "event": "cain-mr2-node-3 and cain-mr2-node-4 stopped; data dirs emptied (identity kept, rest archived on host); on-host snapshots moved aside -- only the off-host copies remain",
   "t": 1790475787.906
  },
  {
   "event": "quorum lost (2 of 4): 0/4 probe writes committed; survivor heights {'cain-mr2-node-1': 50, 'cain-mr2-node-2': 50} -> {'cain-mr2-node-1': 50, 'cain-mr2-node-2': 50} (unchanged)",
   "t": 1790475828.522
  },
  {
   "event": "cain-mr2-node-3: installed the off-host copy held in atl (checksums match manifest: True)",
   "t": 1790475830.205
  },
  {
   "event": "cain-mr2-node-4: installed the off-host copy held in lax (checksums match manifest: True)",
   "t": 1790475836.707
  },
  {
   "event": "restored replicas booted at heights {'cain-mr2-node-3': 52, 'cain-mr2-node-4': 52}; first new commit 9.9 s after start; identical height and state on all four 10.3 s after start; 2/2 writes committed meanwhile; outage (no quorum) lasted 53.8 s",
   "t": 1790475847.829
  }
 ],
 "source_commitment": {
  "engine_version": "33.4-production-hardened",
  "git_commit": "521f84c0456bf118645722073f09df140167b16b",
  "image_id": "sha256:3fb3e6f9eb8770c5db09c98de62d854e89b1a806b88593de04380c553df27e7a",
  "note": "source is not published; the commit hash is a commitment"
 },
 "view_change_qcs": [
  {
   "bundle": {
    "aggregate_signature": null,
    "aggregation_algorithm": "ed25519-individual",
    "algorithm_version": 1,
    "bundle_hash": "301153fc9d607d089f5400b5453f79b7ce7108b541ee9bcb32c57ab7899f12f5",
    "individual_signatures": {
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      "cluster_id": "cain-mr-02",
      "engine_version": "33.4-production-hardened",
      "epoch": 1,
      "msg_type": "VIEW_CHANGE",
      "nonce": "ba9ddc2fcc6f4020a7887f4da47faf42",
      "payload": {
       "prepared_certificates": {
        "21": {
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          "engine_version": "33.4-production-hardened",
          "epoch": 1,
          "msg_type": "PRE_PREPARE",
          "nonce": "23b22e20ce31456aa7d694c01e181711",
          "payload": {
           "client_id": "host-loss-test",
           "operation": {
            "action": "write",
            "data": {
             "rid": "hl000613-mia-down-4"
            },
            "resource": "hl/hl000613-mia-down-4"
           },
           "request_id": "hl000613-mia-down-4",
           "requested_authority": "standard"
          },
          "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
          "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
          "sender_id": "cain-mr2-node-4",
          "sequence": 21,
          "signature_b64": "DRMsU+W+hLWd/Fc+SN9UxsNp1aO5xx7dfc6rkRgy3Rif1Ir+gguLxrSzYK9hhR08Pt2KVnYmlLeNFXMc5oFaDw==",
          "timestamp": 1790467611.0131052,
          "view": 3
         },
         "prepares": {
          "cain-mr2-node-1": {
           "cluster_id": "cain-mr-02",
           "engine_version": "33.4-production-hardened",
           "epoch": 1,
           "msg_type": "PREPARE",
           "nonce": "83ca40a33e924507848deb3985edc38b",
           "payload": {
            "pre_prepare": {
             "cluster_id": "cain-mr-02",
             "engine_version": "33.4-production-hardened",
             "epoch": 1,
             "msg_type": "PRE_PREPARE",
             "nonce": "23b22e20ce31456aa7d694c01e181711",
             "payload": {
              "client_id": "host-loss-test",
              "operation": {
               "action": "write",
               "data": {
                "rid": "hl000613-mia-down-4"
               },
               "resource": "hl/hl000613-mia-down-4"
              },
              "request_id": "hl000613-mia-down-4",
              "requested_authority": "standard"
             },
             "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
             "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
             "sender_id": "cain-mr2-node-4",
             "sequence": 21,
             "signature_b64": "DRMsU+W+hLWd/Fc+SN9UxsNp1aO5xx7dfc6rkRgy3Rif1Ir+gguLxrSzYK9hhR08Pt2KVnYmlLeNFXMc5oFaDw==",
             "timestamp": 1790467611.0131052,
             "view": 3
            },
            "pre_prepare_digest": "116c258373659dc1386fdf5d3eb29177ff299c071ae023b527673fcc449fd339"
           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
           "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
           "sender_id": "cain-mr2-node-1",
           "sequence": 21,
           "signature_b64": "Dt9HgEFizvoYobKFiQQNgjVsurkageeAVaHBCs1Y0JP3DEg+fy70t2q6ZH2io6migIF9SfjewLW5DG+v2XN+AQ==",
           "timestamp": 1790467611.0861158,
           "view": 3
          },
          "cain-mr2-node-2": {
           "cluster_id": "cain-mr-02",
           "engine_version": "33.4-production-hardened",
           "epoch": 1,
           "msg_type": "PREPARE",
           "nonce": "7bc29f32dfea4368bb4025a461b9617f",
           "payload": {
            "pre_prepare": {
             "cluster_id": "cain-mr-02",
             "engine_version": "33.4-production-hardened",
             "epoch": 1,
             "msg_type": "PRE_PREPARE",
             "nonce": "23b22e20ce31456aa7d694c01e181711",
             "payload": {
              "client_id": "host-loss-test",
              "operation": {
               "action": "write",
               "data": {
                "rid": "hl000613-mia-down-4"
               },
               "resource": "hl/hl000613-mia-down-4"
              },
              "request_id": "hl000613-mia-down-4",
              "requested_authority": "standard"
             },
             "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
             "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
             "sender_id": "cain-mr2-node-4",
             "sequence": 21,
             "signature_b64": "DRMsU+W+hLWd/Fc+SN9UxsNp1aO5xx7dfc6rkRgy3Rif1Ir+gguLxrSzYK9hhR08Pt2KVnYmlLeNFXMc5oFaDw==",
             "timestamp": 1790467611.0131052,
             "view": 3
            },
            "pre_prepare_digest": "116c258373659dc1386fdf5d3eb29177ff299c071ae023b527673fcc449fd339"
           },
           "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
           "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
           "sender_id": "cain-mr2-node-2",
           "sequence": 21,
           "signature_b64": "2bW/B+Ty6GjbERZqq8ScbhegfmtmLqAQ/P6tS2VFzQ+kui38nFNaFih08p92Vfk0/1guQ6xKW/CqpnozbKCnCg==",
           "timestamp": 1790467611.0481575,
           "view": 3
          }
         },
         "request_digest": "cfa4fd4a4492abab3a6c89e06ee74401410cc6bff17b3cfc4dc0e3009c73457d",
         "sequence": 21,
         "view": 3
        },
        "22": {
         "pre_prepare": {
          "cluster_id": "cain-mr-02",
          "engine_version": "33.4-production-hardened",
          "epoch": 1,
          "msg_type": "PRE_PREPARE",
          "nonce": "8caa625eef2243019833246176c39a33",
          "payload": {
           "client_id": "host-loss-test",
           "operation": {
            "action": "write",
            "data": {
             "rid": "hl000613-mia-down-5"
            },
            "resource": "hl/hl000613-mia-down-5"
           },
           "request_id": "hl000613-mia-down-5",
           "requested_authority": "standard"
          },
          "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
          "request_digest": "c2e4f1c6c4857b5cdc3c01572e3495fbe0d8c296072cff6dde606e63649e4331",
          "sender_id": "cain-mr2-node-4",
          "sequence": 22,
          "signature_b64": "i9wK3uM8L7kP0IUv5Nvm5rEqn2qNL5kaXRBq7sQZYZnm9JwtfPubKXt218xg7EK4v3EFrFYHXo8nfvAkHCjCAA==",
          "timestamp": 1790467611.4174676,
          "view": 3
         },
         "prepares": {
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   "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
   "decision_hash": "",
   "epoch": 1,
   "leader_proposal": null,
   "leader_proposal_digest": null,
   "parent_decision_hash": "",
   "proposal_digest": "",
   "quorum": 3,
   "quorum_policy": {
    "f": 1,
    "n": 4,
    "quorum": 3,
    "rule": "ceil((N+f+1)/2)"
   },
   "quorum_policy_hash": "13d05661a0b1d519909ca36ee4c21be59adc1384a0a7da6d906dc5248e86130c",
   "sequence": 0,
   "signer_set": [
    "cain-mr2-node-1",
    "cain-mr2-node-2",
    "cain-mr2-node-3"
   ],
   "view": 4
  }
 ],
 "what_this_is": "Every quorum certificate held by each replica of cain-mr-02 after cain-mr2-node-3 and cain-mr2-node-4 (mia, sjc) lost their storage at the same time and were rebuilt only from off-host backups, then caught up while writes continued."
}