A distributed approach for structured resource discovery on Grid

We present a distributed approach for Grid resource discovery, which combines a structured view of resources (single machines, homogeneous and heterogeneous clusters) at the Physical Organization (PO) level with a super-peer network connecting thevarious POs. The proposed architecture is modular and independent of the particular Grid middleware. After a general description, we present some implementation aspects which refer to the Globus Toolkit 4 as Grid middleware and to the JXTA platform to set-up the super-peer network. The system is particularly suitable for discovering resources for structured parallel applications on very large Grids.