Grid Interop

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Information about Grid Interop

Published on June 19, 2007

Author: Mahugani


WLCG-EGEE-OSG Interoperability :  WLCG-EGEE-OSG Interoperability Rob Quick Open Science Grid Operations Center - Indiana University Special Thanks to Rob Gardner your presenter, and Torsten Antoni who helped with the original presentation this one is based on. Outline:  Outline Goals of Interoperability Cross Grid Monitoring Communication Challenges Conclusion Goals of Interoperability:  Goals of Interoperability Seamless operations for users who wish to cross administrative boundaries Users who want to cross grid boundaries need to know the environments, both technical and administrative, will be similar Site Validation and Availability Cross Grid Publication and Notification Trouble Reporting Security Response Goals (Cont.):  Goals (Cont.) Preserving the autonomous boundaries between infrastructures and provide a framework for scalability and defined areas of responsibility Communication between operations groups to assure users feel 'at home' in all WLCG environments Publication and Monitoring:  Publication and Monitoring BDII In place at EGEE and OSG SAMs (EGEE testing of OSG sites) Testing has begun on a single OSG node and is progressing (moderate success with job submission) At this point no modifications have been made explicitly to the OSG node to allow SAM to function I expect a minimal subset of the GLite package will need to be installed to have useful SAM results Problems are being worked through as they are encountered Short term stop in testing while OSG-ITB-0.5.2 is being rolled out Will be restarted on Monday 29 January Publication and Monitoring (Cont.):  Publication and Monitoring (Cont.) VORS (OSG testing of EGEE sites) A single pre-production site is being set up to run OSG critical tests against Problems will be worked through as encountered ‘Ops’ VO will be used for all interop testing and monitoring Limited set of users from both EGEE and OSG Critical Communications:  Critical Communications Ownership of each communication so each reported problem gets the proper followup and reaches proper resolution Critical Updates Relies on communication between operations groups, no formal policy exists This should be a priority Security Notification WLCG Security Model has been implemented Standard patches and updates With interoperability monitoring we need to be careful that standard patches/updates do not break the tools we are using Trouble Ticket Communication:  Trouble Ticket Communication Ticketing OSG Footprints Global Grid User Support Each OSG VO and EGEE ROCs individual ticket system All these helpdesks/ticketing systems are connected and are used for user support and for operations to formally communicate inside and across the infrastructures Ticket Communication:  Ticket Communication Example: OSG User Communicates with EGEE site Example:EGEE Service Communication with OSG Site Communication and Planning:  Communication and Planning Joint Meeting (~every 6 months) Next Joint Meeting, 4-7 June 2007, Indianapolis, IN - US Focus on LHC Data Taking Ramp Up Weekly WLCG Operations Meetings Individual Communications as Needed Software groups Monitoring groups Operations teams Challenges:  Challenges Different Software Stacks Critical Tests on both sides rely on services that may not be standard parts of the other grids software Example:GRIS will not be a standard on OSG releases andgt; 0.5.1, SAMs tests rely on information used by GRIS GRIS will be installed and can be started on OSG 0.5.2+ Binaries and conf files SAM is looking for are not available by default on OSG nodes glite-gridftp-remove, edg-wl-logev A small 'OSG WLCG Validation' software package may need to be developed and configured to allow usefull testing by SAMs Environmental structures are different between GLite and OSG stacks Challenges (Cont.):  Challenges (Cont.) Policies are different, meshing is not always easy or desired Policies are determined by the project drivers, and these are not always the same Ticketed communication is quick, human communication is not always so fast Time differences make it difficult to just pick up the phone and work through problems Face-to-face meetings create a flurry of activity, but it tends to fade between meetings Conclusions:  Conclusions Communications is the key to interoperability and these processes are in place, continuing to refine procedures will be critical to success Operations problems are getting solved Technical and Monitoring issues are being addressed, this is not always a quick and easy process as we are working with different software stacks OSG is committed to interoperability with EGEE, WLCG, and TeraGrid With dedicated effort both technical and administrative challenges can be overcome

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