The EU DataGrid Testbed
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1 The EU DataGrid Testbed The European DataGrid Project Team DataGrid is a project funded by the European Union Grid Tutorial 4/3/2004 n 1
2 Contents User s Perspective of the Grid Grid Services Hardware Components of an EDG Testbed Code distribution policy Grid Tutorial 4/3/2004 Testbed n 2
3 A 3 Tier Business Architecture Request Result Request Data Client On the EDG: User Interface Application Server Computing Services (Computing Element) Storage Services (Storage Element) Data Server Worker Nodes Data Servers Network Grid Tutorial 4/3/2004 Testbed n 3
4 Situation on a Grid? Grid Tutorial 4/3/2004 Testbed n 4
5 Information Services Hardware: EDG Information Service Machine Types: Information Providers Information Service (IS) Replica Catalog (RC) Data: Replica Location Service Software & Services: EDG Grid Services: Information Service Application Services: Currently only EDG applications directly supported Grid Tutorial 4/3/2004 Testbed n 5
6 Situation on a Grid Cont d Information Providers? Info Service Replica Catalog Grid Tutorial 4/3/2004 Testbed n 6
7 Main EDG Grid Services Authentication & Authorization Job submission service Resource Broker Replica Management EDGReplicaManager Replica Location Service (Mass storage system support) Logging & Bookkeeping Grid Tutorial 4/3/2004 Testbed n 7
8 EDG Logical Machine Types User Interface (UI) Storage Element (SE) Information Service (IS) Replica Catalog (RC) Computing Element (CE) Frontend Node Resource Broker (RB) Worker Nodes (WN) Grid Tutorial 4/3/2004 Testbed n 8
9 Services per Machine Type Deamon UI IS CE (frontend ) WN SE RC RB Globus Gatekeeper Replica Catalog GSIenabled FTPd Globus MDS InfoMDS Broker Job submission Information Index Logging & Bookkeeping Local Logger CRL Update Grid mapfile Update RFIO sshd Grid Tutorial 4/3/2004 Testbed n 9
10 A Simple Testbed Configuration CLOSE Storage Element 1 Computing Element 1 Storage Element 2 User Interface Resource Broker Replica Catalog Information Service CLOSE Computing Element 2 Grid Tutorial 4/3/2004 Testbed n 10
11 Testbeds GriDis dissemination testbed Small tutorial and demo testbed has access to application testbed Application Testbed: Enduser Applications Software: Stable, certified release (EDG ) Certification Testbed: Extended, Detailed Testing Software: Tagged release State: Starting ; Collaboration with Testing Group/LCG. Development Testbed: Integration & Evaluation of SW Software: Current tagged release + new pkg. New tagged release. State: Active use; 5 sites involved. Development Machines: Testing of Middleware in Isolation Software: Bleeding edge versions. State: Varied; under control of middleware work packages. Grid Tutorial 4/3/2004 Testbed n 11
12 General Testbed Overview Students Terminals enter Grid enter Grid enter Grid enter Grid UI Resource Broker Computing Elements Storage Elements Information Index Resource Broker Computing Elements Storage Elements Information Index Grid Tutorial 4/3/2004 Testbed n 12
13 NCP Testbed here in Pakistan enter Grid enter Grid UI pcncp21 pcncp23 CE RB pcncp24 SE pcncp22 WN pcncp20 CE pcncp04 SE pcncp25 Grid Tutorial 4/3/2004 Testbed n 13
14 DataGrid testbeds Application testbed: More than 1000 CPUs 5 Terabyte of storage EDG sw installed at more than 40 sites Grid Tutorial 4/3/2004 Testbed n 14
15 Application Testbed Resources Since Last Year: Improved software (EDG 1.4.7). Doubled sites. More waiting Australia, Taiwan, USA (U. Wisc.), UK Sites, INFN, French sites, CrossGrid, Significantly more CPU/Storage. Hidden Infrastructure MDS Hierarchy Resource Brokers User Interfaces VO Replica Catalogs VO Membership Servers Certification Authorities RAL* Site CCIN2P3* CERN* CNAF* Ecole Poly. Imperial Coll. Liverpool Manchester NIKHEF* Oxford Padova Countr y FR CH IT FR UK UK UK NL UK IT UK CPU s GB SARA NL TOTAL GB GB 5 *also Dev. TB; +200 TB including tape Storage 192 GB 1321 GB 1300 GB 220 GB 450 GB 10 GB 15 GB 433 GB 30 GB 666 GB Grid Tutorial 4/3/2004 Testbed n 15
16 Example IS Content Site: NIKHEF CE tbn09.nikhef.nl:2119/jobmanagerpbsqlong: PBS queue "qlong" with 96 hours time limit Software installed: CMS1.0.2 ATLAS1.3.0 ALICE LHCb1.1.1 IDL5.4 NIKHEF D0MCC0.11 There are 0 jobs running and 0 waiting, with 16 CPUs free Close SE tbn03.nikhef.nl with mount point /flatfiles CE tbn09.nikhef.nl:2119/jobmanagerpbsqshort: PBS queue "qshort" with 240 minutes time limit Software installed: CMS1.0.2 ATLAS1.3.0 ALICE LHCb1.1.1 IDL5.4 NIKHEF D0MCC0.11 There are 0 jobs running and 0 waiting, with 16 CPUs free Close SE tbn03.nikhef.nl with mount point /flatfiles SE tbn03.nikhef.nl close to 2 CEs: tbn09.nikhef.nl:2119/jobmanagerpbsqshort tbn09.nikhef.nl:2119/jobmanagerpbsqlong VOs supported: alice atlas biomedical cms earthob lhcb iteam gridftp on port 2811 rfio on port 3147 file Mb of free space Grid Tutorial 4/3/2004 Testbed n 16
17 EDG Software Distribution All software available as binary RPMs Binaries for RedHat 7.3 > 600 packages including Complete globus distribution EDG packages (~50 packages) Support tools (perl, ant, jdk, ) Prepackaged for different machine types Grid Tutorial 4/3/2004 Testbed n 17
18 Issues when Adding new Sites to the Testbed EDG is currently settingup procedures explaining how to add new sites Variations already tested with Taiwan and Romania Stepbystep instructions produced which we expect to become simpler over time Need to clarify the minimum requirements for a site to become a member of the testbed A number of regular tasks have to be performed by the sites administrators A maximum delay needs to be defined for responding to requests/problems if the testbed is to run efficiently Sites from new countries have to identify/create a supporting CA Since CAs need mutual trust this could lead to an explosion of inspection activities Some tasks will fall on the people responsible for managing the VOs HEP experiment secretariats already perform some level of authentication of their institutes and members. How an we get some leverage from this? Grid Tutorial 4/3/2004 Testbed n 18
19 Summary Logical machine types of an EDG Testbed Mapping of services to logical machines Example and current EDG Testbed configuration Code distribution strategy Grid Tutorial 4/3/2004 Testbed n 19
20 Further Information EDG Testbed homepage: Fabric management: LCFG on EDG Testbed information: Grid Tutorial 4/3/2004 Testbed n 20
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