Module native_commit 

Native mode commit protocol (§7.11).

Decouples bulk durability (payload bytes) from ordering (marker stream). Writers persist CommitCapsule payloads concurrently via RaptorQ encoding, then submit to the WriteCoordinator which serializes only: validation + commit_seq allocation + CommitMarker append.

Critical ordering (two fsync barriers, normative):

capsule symbols [written, not fsynced]
  → CommitProof
    → FSYNC_1 (pre-marker, group commit point)
      → CommitMarker
        → FSYNC_2 (post-marker)
          → SHM publish
            → client response

Both fsyncs are mandatory:

• FSYNC_1 prevents “committed marker, lost data” (worst case).
• FSYNC_2 prevents “client thinks committed, marker not persisted.”

Structs

CommitIndex

Commit index: tracks which pages have been modified by recent commits.

CommitSubmission

A commit submission from a writer to the WriteCoordinator (§7.11.1 step 7).

FsyncBarriers

Tracks which fsync barriers have been completed for a commit.

GroupCommitBatch

A batch of pending commits that will share a single fsync.

WriteCoordinator

The WriteCoordinator serializes the validation + commit_seq allocation + marker append section of the native commit protocol (§7.11.2).

Enums

CommitResult

Result of a commit attempt.