kvdb and sfts
kvdb is an “embeddable Key-Value Database and Full Text Search” (via Hoà V. DINH). kvdbo is built on top of kvdb and uses a special key to keep track of the order in which key-value pairs were inserted. The sfts text searcher (built on kvdbo) uses 64-bit integer document IDs and supports prefix, substring, and suffix searches for individual tokens (not phrases). There does not seem to be any documentation about thread safety (looks like build-your-own) or transactions (doesn’t seem to use journal files).
