[SQLite]

I just checked in an experimental change to sqlite3_rsync that allows it to work on non-WAL-mode database files, as long as you do not use the --wal-only command-line option. The downside of this is that the origin database will block all writers while the sync is going on, and the replicate database will block both reads and writers during the sync, because to do otherwise requires WAL-mode. Nevertheless, being able to sync DELETE-mode databases might well be useful, as you observe.

If you are able, please try out this enhancement and let me know if it solves your problem. See <https://sqlite.org/src/info/2025-05-01T16:07Z> for the patch.

[SQLite]

Update: This enhancement is now on trunk and will be included in the 3.50.0 release of SQLite due out in about four weeks.