Benchmarks for custom database I am looking for an open source benchmark tool that can easily be extended to custom databases. The reason is I have created a new NoSQL DBMS (called Borrego) that support both JSON queries like MongoDB and DB2 JSON, and generic SQL statements via a JDBC driver. I would like to run some performance tests that I can compare with other existing databases.
Any pointers would be helpful.

Thanks
I found YCSB, the Yahoo Cloud System Benchmark:
https://github.com/brianfrankcooper/YCSB

It has bindings for many DBMSs, including jdbc and rest interfaces, so it seems to have exactly what I needed.

Thanks!