In the second half of 2009 I was working in European Organization for Nuclear Research (CERN). For some time I was part of GRID development team. One of our product was/is DPM server. What is DPM? LCG Disk Pool Manager (DPM) has been developed as part of the LCG project to provide a light-weight implementation of an SRM compliant Storage Element (SE). Since gLite 3.0 it is a standard gLite component, distributed and maintained as part of the gLite release.
DPM is a disk only SE, instead of a disk + MSS implementation like dCache or Castor. It may act as a replacement for the deprecated classic SE with the following advantages :