GEN: a database interface generator for HPC programs

In this paper, we present GEN an interface generator that takes user-supplied C declarations and provides the necessary interface needed to load and access data from common scientific array databases such as SciDB and Rasdaman. GEN can be used for storing the output of parallel computations directly into the database and automates the previously used inefficient ingestion process which requires development of special database schemas for each computation. Further, GEN requires no modifications to existing C code and can build a working interface in minutes. We show how GEN can be used for Cosmology analysis programs to output data sets in real-time to a database and use for subsequent analysis. We show that GEN introduces modest overhead in program execution but is more efficient than writing to files and then loading. More significantly, it significantly reduces the programmatic overhead of learning new database languages.