WonderDB is a transactional single-node DBMS written in Java.
The last update to the source code was in 2015.
SQL
Physical Logging
N-ary Storage Model (Row/Record)
B+Tree Hash Table
Disk-oriented
Relational
Shared-Everything
http://wonderdb.org/
https://github.com/dreamdbvilas/wonderdb
http://wonderdb.org/?portfolio=high-level-architecture-2
Vilas Athavale
US
2013
2015
Open Source
Java