XXIV International Symposium on Nuclear Electronics & Computing

XXIV International Symposium on Nuclear Electronics & Computing

Atlas team of A.I.Alikanian National Scientific Laboratory

H. Oganezov

Armenian ATLAS Tier 3 Site

• E-Infrastructure hierarchy

• Networking and Computational facilities in Armenia• ASNET AM Network• Armenian National Grid Initiative

• Armenian ATLAS site (AM-04-YERPHI)• History (Background)• Site information• Monitoring and job statistics

• Conclusion and Issues

Outline

ATLAS ALICE

AM-04-YERPHI

INFN-BOLOGNA-T3

INFN-GENOVA

UTD-HEP

E-Infrastructure hierarchy

provides fast interconnection and advanced services

provides a distributed environment for sharing computing power, storage

instruments and databases through middleware





Outline

• Started to develop and realize since 1994 by the Institute for Informatics and

Automation Problems (IIAP NAS RA).

• ASNET-AM serves as the foundation for advanced computing applications in

Armenia.

• Links up academic, scientific, research and educational organizations.

• Provides advanced network services for 60 organizations in the major cities of

Armenia, such as Yerevan, Ashtarak, Byurakan, Abovian, Gyumri.

Connection for ASNET-AM is provided by GEANT and by the channel rented from

the local telecom companies (Arminco, ADC).

ASNET AM Network

ASNET AM Topology

Agreement of Establishment of Armenian Grid Joint Research Unit

was signed in September 2007

Main goals:

• To establish Armenian Infrastructure presence in international Grid

infrastructures

• To provide operations and security services

• To promote the uptake of Grid technologies in Armenia, the

interconnection of existing and future resources, and the deployment of

new applications

• To support researching Grid and Global Computing

Armenian National Grid Initiative

Computational Resources TopologyOrganization Cores

IIAP NAS RA

176

Yerevan State

University

176

State Engineering University

48

IRPHE NAS RA

48

AANL 48

Total 496

Armenian National Grid Initiative

Core Services

wms.grid.am

lfc.grid.ambdii.grid.a

mvoms.grid.

am

ce.iiap-cluster.grid.am

se.iiap-cluster.grid.am

ce.irphe-cluster.grid.am

se.irphe-cluster.grid.am

ce.yerphi-cluster.grid.am

se.yerphi-cluster.grid.am

ce.ysu-cluster.grid.am

se.ysu-cluster.grid.am

ce.ysu-cluster2.grid.am

se.ysu-cluster2.grid.am

ce.seua-cluster.grid.am

se.ysu2-cluster.grid.am

Access point

Core ServicesArmenian National Grid Initiative





Outline

WLCG ATLAS Site Deployment in AANL• 2007

– the AANL site has been certified as “production site” of WLCG• due to low quality of network connection( small bandwidth and frequent outages) site was put in

suspended mode • 2008

– Developing of a national Grid infrastructure-ArmGrid

ArmGrid project is funded by Armenian government and International funding organizations (ISTC, FP7)

• 2009– The "Black Sea Interconnection" was activated to link the Academic and Research Networks of South

Caucasian countries

(Armenia, Georgia and Azerbaijan) to the European Geant-2 network.This opens up new possibilities for ATLAS collaborators at AANL

• 2010– First ATLAS-SouthCaucasus Software/Computing Workshop & Tutorial. It fosters to establish contacts

between ATLAS collaborators and computing people in South Caucasian countries. Workshop helps to better understand ADC requirements and configuration principles

• 2011 – September: ATLAS Computing visit to the AANL

discussions between representatives of the ADC and AANL were very useful in order to make progress on the establishment of AM-04-YERPHI as a ATLAS grid center.

– October 20-th : Site status as ATLAS GRID site was approved by ICB

History (Background)

Site information

o Computational resourceso Model: Dell PE1950 III Additional Quad-Core Xeono CPU: 6 nodes x 2 cpus per node X 4 cors per cpus= 48 cors o HDD:160 GBo RAM: 8 GB

o For local analysiso CPU: 6 nodes x 2 cpus per node x 2 cors per cpus= 24

o Storage Capacityo 50TB

o Site Core Serviceso MAUI/Torque PBSo SRM v1, v2

o Supported VOs:o ATLASo ALICEo ArmGrid

Site Information

Nameo AM-04-YERPHI

Functionalityo Grid Analysis (brokeroff), low priority production and local analysis o Tier3gs

Cloud association

o NL cloud

Regional support

o JINR

Voms groupo atlas/am

Technical supporto 2 sys admins (shared: 0.3 FTE)

DPM 10TB (nfs)

o ATLASSCRATCHDISK 2T o ATLASLOCALGROUPDISK 7.00T o ATLASPRODDISK 1024.00G

ATLAS VO Support

Frontier/ Squid cluster

xrootd cluster

Site information

Running Jobs

Commissioning

Upgrade to sl6, EMI2

Monitoring and job statistics

Network Hardware components replacement work

Job Failure by Category and Exit Code


maui and queue conf. should be optimized

communication problem

sw application, cvmfs (communication) problem

Efficiency and Wall Clock Consumption


Good efficiency of testing and MC production jobs

Data Transfers

SRM errors. Transfer failure for big files. Succeeded after big number of attempts

1G files transferring finished successfully. Problems with bigger file transferring




• Conclusion and issues

Outline

• AM-04-YERPHI site is operational now.

As site administrators become more experienced, problems are resolved faster.

Conclusion and issues

AM-04-YERPHI

Conclusion and issues

Continuous monitoring of the infrastructure by the system administrators ensures early error detection. Diagnostics help to identify problems.

Many configuration problems had been fixed during commissioning, maintenance, but the job scheduling configuration could still be improved.

• Ensuring a reliable network is critical. Issues which still need addressing include

• Reliable connectivity and rapid transport of data being used in the grid environment

• Related work focused on strengthening fault-tolerance.

Thank you

Documents

XXIV International Symposium on Nuclear Electronics & Computing