{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-07T02:45:27.401Z",
  "record_id": "VXI-BDAS-BACKBLAZE-D2-DEVELOPMENT-REVIEW-v1",
  "record_kind": "supplied_review_summary",
  "title": "BDAS Backblaze D2: Reported exactness without performance qualification",
  "system": "BDAS",
  "evidence_family": "supplied_development_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "REPORTED_EXACT_DEVELOPMENT_REPLAY_NOT_PERFORMANCE_QUALIFIED",
  "canonical_question": "Does the supplied Backblaze D2 review establish a performance-qualified result?",
  "near_questions": [
    "Did Backblaze D2 report exact development replay?",
    "Does D2 exactness establish a speedup?",
    "Was the D2 population a fresh holdout?",
    "Can D2 support production promotion?",
    "What does exact but not performance-qualified mean for D2?",
    "Did the supplied D2 review report faster matched timings?",
    "Were the D2 experiment and archive rerun for this entry?",
    "Can D2 prepared-input timing prove raw-source acceleration?",
    "Does D2 establish customer cost or energy savings?",
    "Can the D2 result validate the proposed D3 design?",
    "What changed between D1 recovery and D2?",
    "Which limits must accompany a saved D2 review receipt?"
  ],
  "supported_claims": [
    {
      "claim": "The supplied D2 review reports exact replay on consumed development data, with the evaluated path slower in its reported matched timing comparisons and no net reduction in heavy work. Its disposition is exact development replay without performance qualification. This intake reviewed the report and lineage only; it did not recheck the underlying archive, rerun the experiment or establish fresh holdout performance.",
      "reliance": "SUPPLIED_REVIEW_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "performance qualification or acceleration",
    "fresh holdout validation",
    "production promotion",
    "general exactness guarantee",
    "independent replication by this intake"
  ],
  "public_summary": "The supplied D2 review reports exact replay on consumed development data, with the evaluated path slower in its reported matched timing comparisons and no net reduction in heavy work. Its disposition is exact development replay without performance qualification. This intake reviewed the report and lineage only; it did not recheck the underlying archive, rerun the experiment or establish fresh holdout performance.",
  "related_record_ids": [
    "VXI-BDAS-BACKBLAZE-D1-RECOVERY-REVIEW-v1"
  ],
  "source_review": {
    "source_type": "varexis_supplied_review",
    "source_record_id": "backblaze-d2-development-review",
    "supplied_review_sha256": "c5859935fb10cb1571b2c6c99e22ab5af38f249162249c3fbea4bc9bbaed18ab",
    "supplied_lineage_sha256": "1b03e479973608785c7f9f3c0f0ba0139b4cd18e3444412fe4d805b150d73a48",
    "checked_on": "2026-10-07",
    "underlying_archive_reverified": false,
    "experiments_rerun": false,
    "independent_replication_claimed": false,
    "method": "Supplied review and lineage files read and hashed. Their archive-integrity and experimental claims were not independently reverified during this intake.",
    "source_visibility": "Supplied operator review material; protected details are excluded from public and paid delivery."
  },
  "answer_policy": {
    "classification": "SUPPLIED_REVIEW_WITH_BOUNDARIES",
    "bounded_answer": "The supplied D2 review reports exact replay on consumed development data, with the evaluated path slower in its reported matched timing comparisons and no net reduction in heavy work. Its disposition is exact development replay without performance qualification. This intake reviewed the report and lineage only; it did not recheck the underlying archive, rerun the experiment or establish fresh holdout performance.",
    "required_buyer_context": "The supplied D2 review, intended workload, timing boundary and distinction between development replay and independent qualification.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "evidence_receipt",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#bdas-backblaze-d2-development-review",
  "machine_readable_record": "/varexis-index/records/bdas-backblaze-d2-development-review.json"
}