{
  "slug": "write-offloading",
  "term": "Write off-loading",
  "aliases": [
    "write offloading"
  ],
  "definition": "Write off-loading temporarily redirects a volume's writes to other persistent storage so its disks can remain spun down.",
  "note": "The FAST 2008 design acknowledges writes after persisting data and version metadata. Reclamation returns blocks home; the latest logged version is invalidated only after older versions, protecting recovery from stale data. [offloading08]\n\nLoggers introduce availability dependencies. Reads of blocks not off-loaded can still wake the home volume. [offloading08]",
  "status": "research",
  "advantages": [],
  "limitations": [
    {
      "text": "The evaluation replayed real I/O but emulated power states; its energy savings are not wall-meter measurements.",
      "citationIds": [
        "offloading08"
      ]
    }
  ],
  "related": [
    "maid",
    "power-aware-coding",
    "write-back-cache"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-11-09",
  "citations": [
    {
      "id": "offloading08",
      "title": "Dushyanth Narayanan, Austin Donnelly and Antony Rowstron. Write Off-Loading: Practical Power Management for Enterprise Storage. FAST 2008, sections 2-4 and 6.",
      "url": "https://www.usenix.org/legacy/event/fast08/tech/full_papers/narayanan/narayanan.pdf",
      "accessed": "2026-11-09"
    },
    {
      "id": "hesela-review",
      "title": "Hesela: sleeping disks, write off-loading and measurement boundaries",
      "url": "https://hesela.com/analyses/sleeping-disks-partial-reconstruction/#write-offloading",
      "accessed": "2026-11-09"
    }
  ]
}