The main aim of this project was to demonstrate the effectiveness of an Open Grid Services Architecture (OGSA) component-based approach to middleware for handling one of the large-scale statistical modelling problems currently confronting e-social scientists. We extended the software package SABRE to the context of multiprocess multilevel analysis and provided a parallel version of this extended version as an R object. We also explored the possibility of a Web portal to SABRE and SABRE within R.
SABRE is a software package, written in Fortran, which was designed to model recurrent responses for a collection of individuals or cases. Standard generalised linear models can be fitted as well as various mixture models with random effects. We compared the performance of the GRID-enabled version of SABRE with that of the current brand leaders for this type of data, i.e. Stata and gllamm. We illustrated our approach on 16 data sets (of different sizes and complexity). The largest difference occurred in an example with a 2 Gb data set. In this example Sabre (with 16 processors) was over 2000 times faster than Stata 9 and at least 8000 times faster than gllamm.
Author: Bob Crouchley Date: Wednesday, April 12, 2006 Research summary
Author: Steve Bradley Date: Wednesday, February 8, 2006 Other output
Author: Steve Bradley Date: Wednesday, June 1, 2005 Working paper