db4o

FreespaceConfiguration.UseIndexSystem Method 

configures db4o to use an index-based freespace system.

void UseIndexSystem();

Remarks

configures db4o to use an index-based freespace system.

Advantages
- ACID, no freespace is lost on abnormal system termination
- low memory consumption

Disadvantages
- slower than the RAM-based system, since freespace information is written during every commit

See Also

FreespaceConfiguration Interface | com.db4o.config Namespace