Delaitre, T.

Kacsuk, Péter

Kecskeméti, Gábor

Kiss, T.

Terstyanszky, G.

Winter, S.

SZTAKI Publication Repository

Solving Grid Interoperability between2nd and 3rd Generation Grids by theIntegrated P-GRADE/GEMLCA PortalTamas Kiss, Peter Kacsuk, Gabor Terstyanszky, Thierry Delaitre,Gabor Kecskemeti, Stephen WinterGEMLCA: http://www.cpc.wmin.ac.uk/gemlca/-  Email: gemlca-discuss@cpc.wmin.ac.ukP-GRADE Portal: http://www.lpds.sztaki.hu/pgportalConnecting Second Generation (GT2/LCG) GridsDifferent jobs of a workflow can be mapped to resources within an LCG-based (EGEE  Grid)and a GT2-based (UK NGS) Grid.Supporting the creation and execution of Grid workflows where different jobs of theworkflow are mapped to different grids which- may accept different certificates- can rely on different Grid middleware (e.g. GT2, LCG, g-Lite, GT4, Unicore etc.)- communicate via file transferResearch ObjectivesResults GEMLCA RepositoryBudapestUserP-GRADEGEMLCA PortalExecutablePoznanKrakowEGEE/VOCE - LCGWestminsterOxfordLCG BrokerUK NGSGT2Executable + Proxy certificate 1Executable + Proxy certificate 1Executable + Proxy certificate 2123 4Figure 2. Connecting GT2 and LCG-based Grids Jobs can be submitted through a broker (1), using direct mapping (2), or from the GEMLCAcode repository (3 and 4)Extending 2nd generation (GT2) Grids with 3rdGeneration (GT4) ResourcesGT4 GEMLCA resources can be added to GT2- or LCG-based Grids without any modification ofthe underlying infrastructure. GEMLCA RepositoryOxfordUserP-GRADEGEMLCA PortalExecutableManchesterUK NGS – GT2Executable + Proxy certificateService invocation with   Proxy certificate2WestminsterGT4 resource13Figure 3. Extending GT2 Grids with GT4 resources GT4 GEMLCA resource is accessed via SOAP-XML service invocationConnecting Second (GT2) and 3rd (GT4) Generation Gridsdifferent jobs of a workflow can be mapped to resources within GT2 (NGS) and GT4(WestFocus Grid) based grids GEMLCA RepositoryWestminterUserP-GRADEGEMLCA PortalExecutableBrunelWestfocus GridGT4ManchesterOxfordUK NGSGT2Service invocation with Proxy certificate 2Executable + Proxy certificate 11234Figure 4. Connecting GT2 and GT4 Grids Job submission to GT2-based NGS (1 and 2) and SOAP-XML service invocation to GT4-basedWestFocus Grid (3 and 4).Traffic Simulation Workflow Bridging GridGenerations and MiddlewareWorkflow analysing urban car trafficJobs of the workflow utilised resources in three different Grids:LCG/g-Lite resource in VOCE VO of the EGEE GridGT2 resource in NGS (both direct submission and from GEMLCA coderepositoryGT4 service invocation in Westfocus Grid GT2 Job submission to PoznanGT4 Service Invocation at UoWGEMLCA-R legacy code submitted to ManchesterGT2 Job submission to OxfordWestFocusGridNGSEGEEFigure 5. Traffic Simulation Workflow Running in 3 Different Grids 

Solving Grid interoperability between 2nd and 3rd generation Grids by the integrated P-GRADE/GEMLCA portal

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