Speaker
Ms
Alessandra Forti
(University of Manchester)
Description
The HEP department of the University of Manchester has purchased a 1000
nodes cluster. The cluster is dedicated to run EGEE and LCG software and is currently
supporting 12 active VOs. Each node is equipped with
2x250 GB disks for a total amount of 500 GB and there is no tape storage behind nor
raid arrays are used. Three different storage solutions are
currently being deployed to exploit this space: dcache, xrootd, slashgrid (HTTP based).
In this paper we will present a comparison of their ease of use and their performance
from different perspectives: System management perspective (ease of installation and
maintainance); user perspective (type of functionality and reliability); and
from the performance point of view, with random and streamed access of files.
The comparisons have been done with different conditions of load on the
worker nodes, and with different file sizes. Test executables, user analysis
jobs accessing data from real HEP experiments and file transfers clients
have been used in these tests.
Summary
Comparison of 3 different distributed storage systems (dcache,xrootd,slashgrid)
running on the batch nodes of a grid cluster.
Primary author
Ms
Alessandra Forti
(University of Manchester)
Co-authors
Dr
Andrew McNab
(University of Manchester)
Mr
Colin Morey
(University of Manchester)
Dr
David Bailey
(University of Manchester)
Dr
Richard Hughes-Jones
(University of Manchester)
Prof.
Roger Barlow
(University of Manchester)
