- Get rid of the Tokyocabinet. TC is an awesome software but nowadays it has many hard to fix limitations.
- Use highly concurrent B+Tree index structure with support of MVCC. I have thoughts how to implement it with some ideas from LMDB copy-on-write btree and B-link trees.
- Review usage of BSON data format as the internal representation of documents. Considering more compact formats: MessagePack, Smile, UBJSON, CBOR
- Implemented the file IO library and free space management engine (IOWOW)