--export skipped three things, so a move from one database to another
(RocksDB to PostgreSQL, say) lost them without a word:
- archived items (subspace j), the records behind undelete;
- spam training samples (subspace w);
- the trained spam classifier and its trainer state, blobs stored under
fixed names that no blob link points at, so the walk over links never
reached them.
j and w now travel with the registry family, where their indexes and id
counters already were, so EXPORT_TYPES=registry keeps them consistent.
The two named blobs travel with the blob family. The file format is
unchanged and import reads any subspace it is given, so an export made
by an older binary still imports.
The full-text index (subspace z) stays out, on purpose. It belongs to one
search backend: PostgreSQL and MySQL index into their own tables and have
no z table at all, and external engines keep the index themselves. So
--import now returns the subspaces it wrote, and boot queues the
reindexAccounts and reindexTelemetry store maintenance tasks, the same
ones an administrator can queue by hand, to rebuild the index for
whichever search store the server runs with once it starts.
The round trip also turned up a loss in import itself: the SQL stores
add a negative amount with an UPDATE, which does nothing to a row that
isn't there yet, so every negative counter or quota vanished on import
into PostgreSQL, MySQL or SQLite. Import now creates the row first.
The in-memory subspaces (m, y) stay out: rate limits, locks, greylisting,
ACME challenge tokens and OAuth codes, all short-lived. Issued
certificates are registry objects and travel.
The store test now writes archived items, spam samples, directory
entries, the fork's own subspace and the named blobs, checks they come
back in place, then imports the same export into a fresh store of the
other local backend (RocksDB to SQLite, or SQLite to RocksDB), compares
it key for key and counter for counter, and checks the queued reindex.
It fails on the old export code ("Subspace j was not exported").
--help now says what an export holds.
jcoffey-dev
212cd77cd3