benerator is the leading open source test data generator. Creating a valid amount of realistic load test data is essential for any serious load and performance testing. As of release 0.4.0 benerator incorporates mature and comfortable generation capabilities for relational data, providing convenient database configuration and primary key generation, script support in generators and all import file formats (csv, flat, DbUnit), as well as a staging concept. Especially the script feature is a great improvement in generating random data with multi-field constraints. Furthermore, central concepts were extended for generation of hierarchical data, like dependent data in databases or nested data structures like XML.