INFN Tier–1: a distributed site
v.le B. Pichat 6/2 - 40100
2 INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, IT
3 GARR Consortium, c/o INFN-CNAF, v.le B. Pichat 6/2, Bologna 40100, IT
4 INFN Laboratori Nazionali di Legnaro, Via dell’Università 2, 35020 Legnaro, IT
* e-mail: firstname.lastname@example.org
Published online: 17 September 2019
The INFN Tier-1 center at CNAF has been extended in 2016 and 2017 in order to include a small amount of resources (∼ 22 kHS06 corresponding to ∼ 10% of the CNAF pledges for LHC in 2017) physically located at the Bari-ReCas site (∼ 600 km distant from CNAF). In 2018, a significant fraction of the CPU power (∼ 170 kHS06, equivalent to ∼ 50% of the total CNAF pledges) is going to be provided via a collaboration with the PRACE Tier-0 CINECA center (a few km from CNAF), thus building a truly geographically distributed (WAN) center. The two sites are going to be interconnected via an high bandwidth link (400-1200 Gb/s), in order to ensure a transparent access to data residing on CNAF storage; the latency between the centers is small enough not to require particular caching strategies. In this contribution we describe the issues and the results of the production configuration, focusing both on the management aspects and on the performance provided to end-users.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.