This is a presentation that was held at the Second TPC Technology Conference on Performance Evaluation & Benchmarking, 17.09.2010, Singapore.
In many fields of research and business data sizes are breaking the petabyte barrier. This imposes new problems and research possibilities for the database community. Usually, data of this size is stored in large clusters or clouds. Although clouds have become very popular in recent years, there is only little work on benchmarking cloud applications. We present a data generator for cloud sized applications. Its architecture makes the data generator easy to extend and to configure. A key feature is the high degree of parallelism that allows linear scaling for arbitrary numbers of nodes.We show how distributions, relationships and dependencies in data can be computed in parallel with linear speed up.