MapDB is an open-source (Apache 2.0 licensed), embedded Java database engine and
collection framework. It provides Maps, Sets, Lists, Queues, Bitmaps with range queries,
expiration, compression, off-heap storage and streaming. MapDB is probably the fastest
Java database, with performance comparable to java.util collections. It also provides
advanced features such as ACID transactions, snapshots, incremental backups and much
more.
