EGEE User Forum 01/03/2006 International Telecommunication Union Regional Radio Conference and the EGEE grid Andrea Manara ITU-Radiocommunication Bureau Terrestrial Service Department

Summary International Telecommunication Union (ITU) and the Radiocommunication Bureau (ITU-BR) International Telecommunication Union (ITU) and the Radiocommunication Bureau (ITU-BR) Regional Radio Conference RRC-04/06 Regional Radio Conference RRC-04/06 The data The data Planning process Planning process The computational problem The computational problem The ITU-BR distributed computing system The ITU-BR distributed computing system Experience with the EGEE grid Experience with the EGEE grid Experience with Diane Experience with Diane

The International Telecommunication Union (ITU) ITU: oldest UN agency (17 May 1865) history history Telecommunication Standardization Sector (ITU-T) Telecommunication Standardization Sector (ITU-T) Production of standards covering all fields of telecommunicationsProduction of standards covering all fields of telecommunications Telecommunication Development Sector (ITU-D) Telecommunication Development Sector (ITU-D) Assist developing countries in bridging the “ Digital Divide ”Assist developing countries in bridging the “ Digital Divide ” Radiocommunication Sector (ITU-BR) Radiocommunication Sector (ITU-BR) Management of the radio-frequency spectrum and satellite orbits for fixed, mobile, broadcasting and many other communication servicesManagement of the radio-frequency spectrum and satellite orbits for fixed, mobile, broadcasting and many other communication services

ITU-BR RRC-04/06 Regional Radio Conference for the introduction of digital broadcasting in the UHF ( MHz) and VHF ( MHz) bands. RRC-04 (May 2004, 95 countries) established the technical basis (planning criteria and parameters) for the RRC-06 and defined the work for the intersessional activities Amongst the intersessional activities: First planning exercise (28/02/05-> 15/07/05) Second planning exercise (31/10/05 -> 28/02/06): Draft Plan RRC-06 (15 May–16 June 2006), 120 countries will negotiate the new frequency plan in Geneva. This plan will be part of a new international agreement.

The data Digital broadcasting requirements (~75 K) T-DAB and DVB-T : many system variants (i.e. data capacity/reception modes) ->Reference Planning Configurations Assignments (location and features of transmitter known) Allotments (service area known) -> Reference Networks (number, location, power of transmitters) to approx. real networks Existing and planned analogue radio and television stations (~95 K) Existing and planned fixed and mobile stations (~10 K) Propagation model for field strength prediction to be used for planning based on ITU-R P (statistical model) Planning is to be based on the protection of service area for assignments and allotments

The Planning process Compatibility analysis Compatibility analysis D2d, d2a-a2d, d2o-o2dD2d, d2a-a2d, d2o-o2d For each digital requirement : List of available channels List of available channels List of incompatibilities List of incompatibilities Synthesis Synthesis Determine a suitable frequency for each requirementDetermine a suitable frequency for each requirement to maximize the number of requirements satisfied to maximize the number of requirements satisfied to avoid harmful interference to avoid harmful interference

Results of draft plan

The computational problem Running compatibility analysis very CPU demanding Running compatibility analysis very CPU demanding Very limited time to perform the calculation at the RRC06 Very limited time to perform the calculation at the RRC06 Full scale calculation in < 1dayFull scale calculation in < 1day Smaller parallel regional areas (CNG) runs during the weekSmaller parallel regional areas (CNG) runs during the week First planning exercise (06/2005) CPU time: 90 daysCPU time: 90 days Elapsed time: > 1week!Elapsed time: > 1week! First Planning Exercise d2dUHF Jobs: 428 CPU time: 1300 hours ~ GHz Desktop PCs 6 dedicated 3GHz PCs After the first planning exercise: Look for more resources in BR Look for resources elsewhere -> EGEE

BR distributed computing system Client-Server architecture Client-Server architecture Perl and Windows services Perl and Windows services UDP protocol for client-server communication, XML-RPC protocol for monitoring and control UDP protocol for client-server communication, XML-RPC protocol for monitoring and control Easily scalable Easily scalable 2 jobs in parallel on hyper- threading dedicated PCs (~30% gain on elapsed time) 2 jobs in parallel on hyper- threading dedicated PCs (~30% gain on elapsed time) Hardware resources: 100 dedicated 3.6 GHz hyper- thread PCs(~35 available for draft plan run) 100 dedicated 3.6 GHz hyper- thread PCs(~35 available for draft plan run) 6 dedicated 3.0 GHz PCs 6 dedicated 3.0 GHz PCs 70 auxiliary medium speed PCs 70 auxiliary medium speed PCsAnalysis CPU (h) Elaps(h)PCsJobsd2dVHF d2dUHF d2aVHF d2aUHF a2dVHF a2dUHF d2o-o2d Draft Plan

Experience with the EGEE grid Technical kick-off meeting at CERN (21 October)Technical kick-off meeting at CERN (21 October) Feasibility studies at CERN (24-26 October)Feasibility studies at CERN (24-26 October) Learned how the GRID works, submit jobs and retrieve results Learned how the GRID works, submit jobs and retrieve results Run a small d2dVHF job on all LCG sites (98% efficiency) Run a small d2dVHF job on all LCG sites (98% efficiency) Run workflow: ITU_all.tar (ascii files, fortran exes, data binaries), ~350MB, self-contained Copy and register tar file in two Storage Elements (CERN, CNAF) Submit jdl jobs to Resource Broker via edg-job-submit Input SandBox: itu.pl, input.dat (exe, pointer to first/last record in bin) Output SandBox: two results file (incompatibilities/available channels) Working Node: itu.pl retrieves/untar package from SE, run job Retrieve results ( < 2 MB for 5 reqs/batch)  Too much overhead for ITU requirements!  DIANE framework

Experience with Diane Run on the Grid using DIANE (1 November) Run on the Grid using DIANE (1 November) Master-worker system optimise the usage of resources (see K.Moscicki talk n. 100 on “Special Type of Jobs” session)Master-worker system optimise the usage of resources (see K.Moscicki talk n. 100 on “Special Type of Jobs” session) Verification of the results quality (porting):Verification of the results quality (porting): results files comparison btw LCG (Linux) and ITU (Windows) resources results files comparison btw LCG (Linux) and ITU (Windows) resources Full-scale test with Draft Plan data (Feb. 2006)Full-scale test with Draft Plan data (Feb. 2006) d2d and d2a analysis (5 requirements/batch) ~30k jobs d2d and d2a analysis (5 requirements/batch) ~30k jobs AnalysisCPU(h) Elaps( h) CPUs CPUsTasks d2dVHF d2dUHF d2aVHF d2aUHF Institutions which will provide resources for the RRC-06: CERN, CNAF (I), PIC (E), DESY (D), MSU (Russia), CYFRONET (PL)

Experience with Diane Draft Plan d2dUHF

Conclusion A key ingredient for the success of the ITU Regional Radio Conference RRC-06 is the capability of performing calculations in a very limited amount of time. A key ingredient for the success of the ITU Regional Radio Conference RRC-06 is the capability of performing calculations in a very limited amount of time. Two independent distributed systems are available for the RRC-06 Two independent distributed systems are available for the RRC-06 The EGEE infrastructure insure adequate support for an important CPU-demanding international event and opens the possibility to allow faster and more detailed studies during the Conference The EGEE infrastructure insure adequate support for an important CPU-demanding international event and opens the possibility to allow faster and more detailed studies during the Conference Need to study how to share the runs (full planning area + smaller regional areas) between EGEE grid and ITU distributed computing infrastructure to minimize overall running time. Need to study how to share the runs (full planning area + smaller regional areas) between EGEE grid and ITU distributed computing infrastructure to minimize overall running time.

Acknowledgment The ITU-CERN collaboration on the EGEE grid was possible thanks to the work of many people: The ITU-CERN collaboration on the EGEE grid was possible thanks to the work of many people: CERN: M.Lamanna, P.Mendez, K. Moscicki ITU: T.Gavrilov, P.N.Hai, D.Botha, M.Cosic