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The GIOD Project: Globally Interconnected Object Databases

Bunn, Julian J and Holtman, Koen and Newman, Harvey B. and Wilkinson, Richard P. (2000) The GIOD Project: Globally Interconnected Object Databases. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechCACR:CACR-2000-183

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Abstract

The GIOD (Globally Interconnected Object Databases) Project, a joint effort between Caltech and CERN, funded by Hewlett Packard Corporation, has investigated the use of WAN-distributed Object Databases and Mass Storage systems for LHC data. A prototype small-scale LHC data analysis center has been constructed using computing resources at Caltech's 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 Studio tool. An event viewer was constructed with the Java 3D API. Using this suite of software, tests were made in collaboration with researchers at FNAL and SDSC, that focused on distributed access to the database by numerous clients, and measure-ments of peak bandwidths were made and interpreted. In this paper, some significant findings from the GIOD Project are presented, such as the achievement of the CMS experiment's 100 MB/sec database I/O milestone.


Item Type:Report or Paper (Technical Report)
Group:Center for Advanced Computing Research
Subject Keywords:GIOD, ODBMS, WAN, LHC, CMS
Record Number:CaltechCACR:CACR-2000-183
Persistent URL:http://resolver.caltech.edu/CaltechCACR:CACR-2000-183
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:28160
Collection:CaltechCACR
Deposited By: Imported from CaltechCACR
Deposited On:18 Mar 2004
Last Modified:26 Dec 2012 14:31

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