Overview of ATLAS Israel Computing RECFA, April Overview of ATLAS Israel Computing Overview of ATLAS Israel Computing RECFA Meeting Tel Aviv University, Israel April 2014 Lorne Levinson Weizmann Institute of Science

Overview of ATLAS Israel Computing RECFA, April Organization We are ~1.3% of ATLAS. Our pledge is 1.3% of ATLAS Tier-2 resources –plus, we provide resources for use by Israeli ATLAS, ~40 users ATLAS Israel provides a distributed Tier-2 and Tier-3 Tier-0 = CERN Tier-1: 10: at large national labs: Europe, Taiwan, USA, Canada Tier-2: ~30: one per country or region of a large country Tier-3: university group, for local computing only –clusters at Technion, Tel Aviv, Weizmann –each cluster combines Tier-2 and Tier-3 resources all resources are shared flexibly between Tier-2 and Tier-3 Single management; single budget and purchasing The three sites are as identical as possible Steering Committee for overall policy Management & Operations team for the three sites

Overview of ATLAS Israel Computing RECFA, April The bandwidth of our connection to Europe lags because undersea cables are more expensive.

Resources Above storage is a high performance storage system (DDN 9900) –Cluster-wide global file system for both Tier-2 and Tier-3 (Lustre) –Connected to cluster via 2 or 3 10Gbit/s links System administration manpower: 2.5 FTEs Steering Committee: –Ehud Duchovni, Erez Etzion, Lorne Levinson, Yoram Rozen Overview of ATLAS Israel Computing RECFA, April Tel AvivTechnionWeizmannTotal Storage (net TB) ,230 Work nodes Job slots7841,1081,6113,503

Pledged resources Storage (TB) CPU ( HEPspec) Overview of ATLAS Israel Computing RECFA, April Has increased about 15% per year Tracks at least 1.3% of ATLAS Tier-2 declared requirements 2014: storage: 1.96% CPU: 2.46% of ATLAS Tier-2 (ATLAS barely increased, but we did.) 2013: storage: 1.71% CPU: 1.54% of ATLAS Tier-2

Our contribution to ATLAS We are 1.3% of ATLAS. Our pledge is 1.3% of ATLAS Tier-2 resources. We deliver more, but depend on Nikhef/SARA to send jobs and files. Overview of ATLAS Israel Computing RECFA, April % Despite most sites contributing more than their pledge.

Other users We support also other grid Virtual Organizations at a few percent or when ATLAS is not busy: –ILC –LHCb We also have local groups who buy and place equipment in our clusters: HEP phenomenologists, Phenix Heavy Ion expt, Xenon Dark Matter expt, Condensed Matter theorists, Geneticists They benefit from: –our system management and user support –joining our tender to purchase –storage space and fast networking –the possibility to burst a large number of jobs at once and then disappear for days or weeks. On average they use less than they contribute; but, they can get bursts of power 10+ times what they purchased. Guests are occasionally granted access for a short term: Computer Science, Electrical Engineering, Biology, … Overview of ATLAS Israel Computing RECFA, April

Overview of ATLAS Israel Computing RECFA, April End