The GIOD Project - Globally Interconnected Object Databases

• Main Authors: Julian J. Bunn, Koen Holtman, Harvey B. Newman, Richard P. Wilkinson
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2000
• Subjects: Orca
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.42.6453; http://pcbunn.cithep.caltech.edu/pubs/giod_chep2000.pdf

The GIOD (Globally Interconnected Object Databases) Project, a joint effort between Caltech and CERN, funded by Hewlett Packard Corporation, has investigated the use of WANdistributed Object Databases and Mass Storage systems for LHC data. A prototype smallscale LHC data analysis center has been constructed using computing resources at Caltechs Centre for Advanced Computing Research (CACR). These resources include a 256 CPU HP Exemplar of ~4600 SPECfp95, a 600 TByte High Performance Storage System (HPSS), and local/wide area links based on OC3 ATM. Using the Exemplar, a large number of fully simulated CMS events were produced, and used to populate an object database with a complete schema for raw, reconstructed and analysis objects. The reconstruction software used for this task was based on early codes developed in preparation for the current CMS reconstruction program, ORCA. Simple analysis software was then developed in Java, and integrated with SLACs Java Analysis Stud.