We are pleased to announce the public release of the Darshan Data Repository. The Darshan Data Repository is a collection of anonymized I/O characterization data captured from production systems. The first data set to be made available covers three months of activity (as recorded by Darshan) from the Intrepid Blue Gene/P system at the Argonne Leadership Computing Facility. We hope to add more data in the future. See the Darshan Publications page for examples of analysis that can be performed with this data.