Disk Resident Arrays (DRA) extend the Global Arrays (GA) Non-Uniform Memory Access (NUMA) programming model to disk. The library encapsulates the details of data layout, addressing and I/O transfer in disk arrays objects. Disk resident arrays resemble global arrays except that they reside on the disk instead of the main memory.

The Disk Arrays library is a part of a joint project between Pacific Northwest National Laboratory and Argonne National Laboratory on the parallel I/O for chemistry applications, ChemIO.

A paper describing DRA in more details as is available.