{
  "slug": "fuse-writeback-cache",
  "term": "FUSE writeback-cache",
  "aliases": [
    "FUSE_WRITEBACK_CACHE"
  ],
  "definition": "FUSE writeback-cache is a negotiated mode that buffers file writes in the kernel page cache before forwarding them to a userspace filesystem.",
  "note": "Partial overwrites: the daemon may need to serve reads even for a write-only open. [libfuse-api]\n\nCoordination: external writers require an explicit coherence design; enabling the mode alone does not provide one. [fuse-modes]",
  "related": [
    "fuse",
    "page-cache",
    "write-back-cache",
    "buffered-io"
  ],
  "citations": [
    {
      "id": "fuse-modes",
      "title": "Linux v6.12: FUSE I/O modes",
      "url": "https://www.kernel.org/doc/html/v6.12/filesystems/fuse-io.html",
      "accessed": "2026-10-18"
    },
    {
      "id": "libfuse-api",
      "title": "libfuse 3.16.2: low-level open, flush, release and fsync contracts",
      "url": "https://github.com/libfuse/libfuse/blob/fuse-3.16.2/include/fuse_lowlevel.h",
      "accessed": "2026-10-18"
    },
    {
      "id": "hesela-fuse",
      "title": "Hesela: FUSE writeback caching and the fsync contract",
      "url": "https://hesela.com/analyses/fuse-writeback-cache-fsync/",
      "accessed": "2026-10-18"
    }
  ],
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-18"
}