Fotis Georgatos | Searcharxiv

arXiv2008

How applicable is Python as first computer language for teaching programming in a pre-university educational environment, from a teacher's point of view?

This project report attempts to evaluate the educational properties of the Python computer language, in practice. This is done by examining computer language evolution history, related scientific background work, the existing educational research on computer languages and Python's experimental application in higher secondary education in Greece, during first half of year 2002. This Thesis Report was delivered in advance of a thesis defense for a Masters/Doctorandus (MSc/Drs) title with the Amstel Institute/Universiteit van Amsterdam, during the same year.

cs.PL↗

arXiv2008

Performability Aspects of the Atlas Vo; Using Lmbench Suite

The ATLAS Virtual Organization is grid's largest Virtual Organization which is currently in full production stage. Hereby a case is being made that a user working within that VO is going to face a wide spectrum of different systems, whose heterogeneity is enough to count as "orders of magnitude" according to a number of metrics; including integer/float operations, memory throughput (STREAM) and communication latencies. Furthermore, the spread of performance does not appear to follow any known distribution pattern, which is demonstrated in graphs produced during May 2007 measurements. It is implied that the current practice where either "all-WNs-are-equal" or, the alternative of SPEC-based rating used by LCG/EGEE is an oversimplification which is inappropriate and expensive from an operational point of view, therefore new techniques are needed for optimal grid resources allocation.

cs.PF↗

arXiv2007

A Technical Report On Grid Benchmarking using ATLAS V.O

Grids include heterogeneous resources, which are based on different hardware and software architectures or components. In correspondence with this diversity of the infrastructure, the execution time of any single job, as well as the total grid performance can both be affected substantially, which can be demonstrated by measurements. Running a simple benchmarking suite can show this heterogeneity and give us results about the differences over the grid sites.

cs.PF↗

arXiv2007

A Technical Report On Grid Benchmarking using SEE V.O

Grids include heterogeneous resources, which are based on different hardware and software architectures or components. In correspondence with this diversity of the infrastructure, the execution time of any single job, as well as the total grid performance can both be affected substantially, which can be demonstrated by measurements. Running a simple benchmarking suite can show this heterogeneity and give us results about the differences over the grid sites.

cs.PF↗

arXiv2006

LiveWN, cpu scavenging in the Grid Era

The goal of this research is to introduce an easy and versatile way to provide and use Grid resources without the need of any OS installation or middleware configuration. At the same time we provide an excellent training tool for newer Grid users and people that want to experiment, without enforcing any installation. We have been testing it thoroughly under different circumstances with firm success.

cs.DC↗