1. Glite/ARC interoperability Christian Ulrik Søttrup EGEE-II/(KnowARC)

2. 21/09/06 Interoperabillity Allowing seamless job submission access to NorduGrid resources from Glite clients and vice versa. Implies interoperability of info systems Glite -> Nordugrid covered by EGEEII ARC -> EGEEII covered by KnowARC

3. 21/09/06 Glite -> Arc Glite broker uses Condor-G to submit to LCG and Glite CEs, using GT2 and Condor-C respectively Condor-G >=6.7.12 can submit to Arc Idea: create a Glite info server with Arc info and then modify the broker to use Condor-G Arc submit.

4. 21/09/06www.knowarc.eu 4 Glite -> Arc Overview

5. 21/09/06www.knowarc.eu 5 Glite -> Arc Status Information System  preliminary system (arc-bdii.cern.ch) works  needs full scale testing  Problem with resource matching, Glite CE-matcher uses Glite specific comments from the bdii. WMS condor  Development Glite-WMS system w. condor/Arc works (for Glite jobs)  New Glite version incorporates usable condor  JobAdapter needs test (and recoding)

6. 21/09/06www.knowarc.eu 6 Arc -> Glite Gateways/Direct Direct: Integrating Nordugrid client and condor  Pros: Direct submission to Glite CEs  Cons: Bloat: NG Client ~ 10mb; Condor ~100mb Interface changes. (Glite update -> ARC update) Gateways:  Pros: Better scheduling  Cons Scalability/price

7. 21/09/06www.knowarc.eu 7 Arc -> Glite CE interface Gateways/Direct not feasible Solution: Open interface for job management on Glite CEs Good news: CREAM a new CE type with a web service interface developed under EGEE Bad news: Not supported by Glite production CEs, yet. But is installed on Glite testbeds.

8. 21/09/06 Arc -> Glite Webservices CREAM interface:  Pros: Direct submission to EGEE controlled CEs Scalability Composability Portability – easy to build NG clients for windows and Mac  Cons: Performance – Binary XML might help, but no standard yet.

9. 21/09/06 Arc/Glite new solution Integrating a CREAM compatible Web Service layer in Arc, both client and server. Server CREAM layer can work independently of the Grid Manager Pros: Gives interoperability through open interfaces. As well as a WS interface for Arc. (Task 1.2) Windows/Mac Arc client can use WS interface for easy porting.

10. 21/09/06www.knowarc.eu 10 Thank you Questions? Ideas -> soettrup @ nbi. dk