Smyle

Smyle is a database solution for Java applications.

Benchmark results

Features

• Open source
• Personal or commercial use at no charge
• Convenient usage - seamlessly integrated with Java
• Lightweight
• Structured data types
• Queries
• Transactions (commit/rollback)
• Self-optimizing: Indexes are created as necessary
• Flexible multidimensional indexes
• Basic schema evolution performed automatically
• High reliability

-Journalling storage model

-Robust, instant crash recovery

-Backed by large unit test suite

-Tried in real-world applications

• Full thread safety
• Mostly lock-free read access
• Pure Java (requires JDK 1.3 or higher)
• Can be embedded in applications
• Compatible with GJ (extended Java dialect)
• Based on Java Collection API where possible
• Automatic conversion of legacy Smyle 0.1/0.2/0.2.5/0.3 beta/0.8.* stores

http://www.drjava.de/smyle/index.html