The workflow storage migration rewrites old-form image rows (text inline)
to document ids, batch by batch:
- Each batch is one BEGIN IMMEDIATE transaction of at most 200 rows or
16 MB of text, found by a rowid range search and read one row at a time.
- Each text is stored or reused, then read back through the one accessor
before its row changes; a text that would not come back identical fails
and rolls back the whole batch.
- A value that is not text stays inline and is counted as protected.
- A crash or a stop leaves committed batches new form and the rest old
form; both read the same, and a rerun continues. No media file is opened.
- Unreferenced documents are swept at the end.
The maintenance preview gains a read-only workflow_storage plan (records to
rewrite, inline bytes where SQLite has octet_length, the Reclaim space and
older-version notes). reclaim_space sweeps, runs VACUUM and truncates the
WAL so the freed pages go back to the disk.
generated_images.workflow_data and prompt_metadata repeated the same large
JSON text for every image of a run. Each distinct text now lives once in
workflow_documents, keyed by the sha256 of its exact UTF-8 bytes and
zlib-compressed; image rows reference it through workflow_document_id and
prompt_document_id.
- New writes (link_image_to_prompt, pair ingestion for scan, monitor and
Needs review) store the new form. Old rows keep their inline text and
read the same until the migration rewrites them.
- Every reader goes through one accessor (read_stored_text,
resolve_image_row): gallery and legacy image lists, image by id, prompt
info for the inspector and metadata page, diagnostics. Payloads keep their
shape. Inline text wins when present; a document that fails its length or
hash check reads as unreadable, never as other text.
- No trigger (restore validators refuse them): a document goes in the same
transaction as its last reference (image and prompt deletes, missing-link
cleanup, duplicate merges, duplicate-file link merges, ingestion updates),
and a sweep at startup catches anything a path missed.
- verify_database_file validates the table, the id columns, their foreign
keys and indexes, and the stored values.
Final review of #313:
- C1: the duplicate find tells files apart by (st_dev, st_ino), so a
source listed twice, a symlinked source inside another and a hardlink
are one file. The preview and the job refuse a removal that
os.path.samestat matches with its kept copy.
- I1: each file's records move to its verified kept copy in one short
transaction before that file is unlinked; a failed move deletes
nothing and a failed unlink leaves the records on the identical kept
copy. The status line counts files removed and not removed.
- I2: links are looked up under every spelling of the source (the real
path, the configured and monitored folders, ComfyUI's output).
- I5: image tags join the kept copy as their union and the removed
copy's pending, undecided Needs review items are settled; the plan
says so.
- I3: the VACUUM disk check measures SQLite's real temporary folder.
- M1: the token is looked at again with no await before the job starts.
- M2: the backup decision is made once and handed to the job.
- M3: backups are linked into place; startup sweeps interrupted temps.
- M4: Optimize runs alone (new "exclusive" admission) and its plan says
the database is locked while VACUUM runs.
- M5: the reviewed duplicate merge is strict: collisions and Library
titles are protected, and errors roll back. The legacy cleanup is
unchanged.
- M7: 2,000 keep entries within a 1 MiB body. M8: event waits in tests.
- M9: the preview binds files by size, mtime and inode without hashing;
the job hashes right before each unlink.
Duplicate image files move onto the job registry:
- POST /prompt_manager/jobs/duplicates finds content-identical media
files over every effective source as a cancellable read job
("Find duplicate image files", group groups_found); the server holds
the groups per job and GET /prompt_manager/maintenance/duplicates/{id}
pages them ten at a time.
- The duplicate_files preview binds a removal to the reviewed keepers.
Every keeper and removal is checked again: containment as text before
any filesystem access, then not a link, still inside its source, same
size and hash. The plan lists the database links that move.
- Apply runs duplicate_cleanup (records, not cancellable): the promised
safety backup, then per file a recheck, the unlink with every handle
closed and its thumbnail. A changed file is kept, the first failed
unlink stops the job with a coded message (never the OS text), and only
removed files have their image links and favorites moved to the kept
copy.
- The legacy scan, stream, status and delete routes keep their shapes on
the same registry kinds; the hashing, grouping and thumbnail removal
are shared with them.
Coordinator rulings on Tasks 15-16:
- Safety backups share the restore pool of 10 `<db>.backup_*` files; the
pool is now also pruned when an apply fails after its backup.
- Plans report the safety backup's size and the free disk space, and
apply refuses up front (507 insufficient-space) when the backup or
VACUUM does not fit, so no job fails halfway for space.
POST /prompt_manager/maintenance/apply {token} starts a maintenance job
(records admission, not cancellable, groups changed/protected/errors).
The token is consumed on the loop turn the job starts: a second apply is
409 plan-used naming the job, a busy refusal keeps the token, an unknown
or expired one is 410 plan-expired, and a restore since the review is
409 storage-changed.
With the safety backup policy on (maintenance.safety_backup, default true,
saved through the settings route with the revision), the job first writes
a backup into a temp file beside the database, makes it a standalone
rollback-journal file, verifies it, fsyncs it and renames it onto a unique
<db>.backup_<YYYYmmdd_HHMMSS_ffffff>[_n] name; any failure leaves no file
and nothing changed. The apply then rechecks the reviewed fingerprint
inside BEGIN IMMEDIATE (plan-changed writes nothing), deletes in batches of
400 ids, counts changed and protected records, logs the backup by name
only and prunes old safety backups. With the policy off the log and the
status line say "No safety backup".
POST /prompt_manager/maintenance/preview reviews duplicate_prompts,
optimize, unused_components or missing_links on its own mode=ro snapshot
and answers a Plan (scope, protected reasons, backup policy, media, at most
50 detail rows). The fingerprint, targets and judged sources stay in a
server-side PlanStore under a single-use token (15 min, 8 plans, 16 MiB,
never truncated; a restart forgets them), bound to the database it read.
The previews reuse the legacy queries: duplicate groups and the merge are
shared with cleanup_duplicates, ORPHANED_PROMPTS_SQL is built from the
#239 protection predicates the plan reports, and missing links are judged
by the health check's link_states. Legacy /maintenance keeps its shape;
vacuum now reports success:false when VACUUM fails, and
cleanup_orphaned_images skips links under unavailable sources.
Vito Sansevero