{
  "slug": "direct-io",
  "term": "Direct I/O",
  "aliases": [
    "O_DIRECT"
  ],
  "definition": "Bypassing the OS page cache so applications read and write block devices with their own buffers.",
  "note": "",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "related": [
    "block-storage",
    "ssd"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "c1",
      "title": "open(2) — O_DIRECT",
      "url": "https://man7.org/linux/man-pages/man2/open.2.html",
      "accessed": "2026-03-26"
    }
  ]
}