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Present and Future of One of the largest
Grid Infrastructure in Europe
T. Ferrari*, L. Carota*, L. Gaido**, F. Nebiolo* for the Italian Regional Operations Centre
* INFN-CNAF, Bologna **INFN-Torino
The Italian Grid infrastructure currently comprises more than forty resource centers, which are hosted and operated by various
research institutes and the academy, such as INFN, CNR, ENEA, SPACI and Universities. It is fully integrated with the pan-European
Grid infrastructure built and operated under the umbrella of the project EGEE-III, and is currently strengthening its integration with
various Italian Grid regional infrastructures.
The Italian Grid infrastructure provides a distributed computing platform based on the principle of resource sharing by users from many
scientific disciplines, such as Physics, Astrophysics, Biology, Health, Chemistry, Geophysics, Economy, Finance and extensions to
other sectors such as Civil Protection and Industry. It has a central role in Grid development and deployment activities in Italy, from
sharing its infrastucture and know-how, to establish platforms for further development of Grid applications.
Application, Grid Services, Available storage per Virtual
The Italian Grid:
and Grid Foundation 36 Sites, 39 Virtual Organization, Organization
Middleware Relationship 6555 CPUs, 5.2 PB of Storage
• 4 PB of disk space
Applications • 1 PB of tape storage
Higher-Level Grid Services:
Workload Management OTHERS
Logging and Bookeeping CNR ILC Pisa
CNR PROD Pisa
ops dteam lhcb cms atlas
Data Management INFN ENEA-INFO Frascati
ESA-ESRIN Frascati
alice virgo argo infngrid biomed
INFN-Bari INAF-Trieste
babar theophys zeus cdf egrid
INFN-Bologna CNR-ITB Bari
gridit bio inaf enea compchem
INFN-Cagliari SISSA Trieste esr magic ingv plank pamela
INFN-Cascina SNS-Pisa libi cyclops compassit euindia euchina
INFN-Catania SPACI Cosenza eumed geant4 gear edteam eela
Foundation Grid Middleware: INFN-CNAF
INFN-Ferrara
SPACI Lecce
SPACI Napoli
na48 auger fusion embrace
Security Model INFN-Firenze
INFN-Frascati
UNI Perugia
Computing Element INFN-Genova
INFN-Lecce Accounting per VO
INFN-LNL
Information and monitoring INFN-LNS
(last 12 months)
INFN-Milano
Accounting INFN-Napoli
INFN-Padova
INFN-Parma
INFN-Perugia
•The Workload Management System INFN-Pisa
INFN-Roma1
(WMS) accepts user jobs, assigns INFN-Roma2
INFN-Roma3
them to a site, records their status and Prog. Operativo INFN-Tier1
INFN-Torino
retrieves their output. Nazionale “Ricerca” INFN-Trieste
•The Logging and Bookeeping (LB) SCOPE-UNI-Federico II-Napoli
PI2S2-COMETA-SCIRE_Napoli
PI2S2-COMETA-INGV Roma
service tracks jobs managed by the PI2S2-COMETA-Catania
PI2S2-COMETA-Palermo
WMS. PI2S2-COMETA-Messina
CRESCO-ENEA-Casaccia
•The Storage Resource Manager CRESCO-ENEA-Frascati
CRESCO-ENEA-Bologna
provides dynamic space allocation and CRESCO-ENEA-Portici (NA)
CRESCO-ENEA-Trisaia (MT) •Italian grid: https://grid-it.cnaf.infn.it/
CRESCO-ENEA Brindisi
file management, defining a standard CRESCO-Uni-Salerno
•European grid: https://eu-egee.org/
CRESCO-Uni-Tor Vergata
interface to allow interoperability CYBERSAR Cosmolab Cagliari
•USA grid:https://www.opensciencegrid.org/
between different storage systems.
•The LCG File Catalogue maintains
mappings between Logical File Names, Computing Jobs supported
Storage URL and Grid Unique
• The Message Passing Interface (MPI): a commonly dteam 14,30k (29,3%) ops 11,75k (24,1%)
IDentifiers.
used standard library for parallel programming. lhcb 7,43k (15,2%) atlas 5,78k (11,8%)
• The File Transfer Service is a low
WMS handles MPI jobs as a set of processes that alice 3,35k ( 6,9%) biomed 3,20k ( 6,6%)
level data movement service which
run on different Worker Nodes (WN) in the same CE. others 3,04k ( 6,2%)
schedules data transfer jobs between
• Collections: sets of independent jobs.
source and destination sites according
• Checkpointable jobs: the WMS saves intermediate
to configurable internal policies.
job states in the LB;
• The Grid Securiy Infrastructure is
• Direct Acyclic Graphs: sets of jobs linked by
based on public key encryption, X.509
relative dependencies;
certificates, and the Secure Soket
• Partitionable jobs: sets of independent sub-jobs,
Layer protocol. A system called VOMS cms zeus euchina eumed
plus an initial pre-job and a final aggregator job; theophys esr infngrid bio
(Virtual Organization Management lhcbprd geant4 atlassgm gridit
• Parametric jobs: collections where the jobs are egrid compchem libi geant4sgm
Services) is used to manage cdf argo
identical, but for the value of a running parameter;
information about roles and privileges
• Interactive jobs: they open a real time connection
of users within a Virtual Organization Jobs submitted
with a remote host. The job standard streams are
(VO).
•The Computing Element (CE) is a set
redirected from/to the remote host. via resource brokers
of services that provide homogenous,
managed, and secure access to
heterogeneous, remote computing
Future Operational Model
resources. The future operational model will need to support the
•The principal information and management of resources and services of an
monitoring service is named GridICE, infrastructure which is expected to quickly grow in
it collects information according to scale, in terms of number users, services, sites
standard schema and collects operated and middleware stacks supported. The
historical data in a persistent storage. guiding lines of this transition will be the autonomy
•The accounting system (DGAS) of national Grid, self-functionality and the full
perform an accurate Usage Metering integration with the operational model adopted by the
related to jobs and users by sensors pan-European Grid infrastructure.
installed on Computing Elements.
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