1 Bogotá, EELA-2 1 st Conference, On the Co-existence of Service and Opportunistic Grids Francisco Brasileiro Universidade Federal de Campina Grande – UFCG E-science grid facility for Europe and Latin America

2 Bogotá, EELA-2 1 st Conference, Motivation As the grid technology matures, more and more infrastructure enter in production Following the sharing spirit of grids, a lot of attention has recently been placed in the interoperation of grid systems Most of the interoperability efforts developed so far follow a “bridge” approach –Gateways allow resources of one grid (or the entire grid) to be exposed as a resource of the other grid –Jobs submitted in one grid can, transparently, end up being executed in resources of the other grid

3 Bogotá, EELA-2 1 st Conference, Motivation Most grids currently in production can be classified as either service grids (eg. EGEE, TeraGrid, etc) or opportunistic grids (eg. voluntary computing, desktop grids) These are very different systems, catering for different needs, and providing different challenges to users and administrators –Dedicated vs shared resources –Clusters/supercomputers vs desktops –Small vs large number of administrative domains –Well defined QoS levels vs best effort –Complex vs simple management –All sorts of applications vs BoT applications

4 Bogotá, EELA-2 1 st Conference, Motivation We advocate that co-existence (instead of interoperation) may be, in some cases, a better strategy to explore synergy between grids of different kinds –In particular, the co-existence of a service and an opportunistic grid allows:  Idle resources from the service grid to be used in an opportunistic way  Increase the size and reach of the grid infrastructure with shared resources  More suitable platform to run simple BoT applications, possibly liberating service grid resources to run essentially the tightly-coupled applications or more sophisticated BoT applications

5 Bogotá, EELA-2 1 st Conference, What is an OurGrid-based grid? Sandboxing (WM+WN) Sandboxing (WM+WN) User Interface Application Scheduling User Interface Application Scheduling Resource Centre Manager Grid-wide Resource Sharing Resource Centre Manager Grid-wide Resource Sharing

6 Bogotá, EELA-2 1 st Conference, UI JDL Logging & Book-keeping ResourceBroker Job Submission ServiceStorageElementComputingElement InformationService LFCCatalog Author. &Authen. What are the components of a gLite-based grid?

7 Bogotá, EELA-2 1 st Conference, A closer look at the gLite CE

8 Bogotá, EELA-2 1 st Conference, Road map for the middleware co-existence and interoperation Allowing idle resources in an EELA-2 gLite resource centre to be exposed as OurGrid resources

9 Bogotá, EELA-2 1 st Conference, Road map for the middleware co-existence and interoperation Allowing resources of an OurGrid resource centre to be exposed as gLite resources –This will be achieved in two steps  Firstly, allow clusters to be exposed as a single resource in an OurGrid resource centre

10 Bogotá, EELA-2 1 st Conference, Road map for the middleware co-existence and interoperation Allowing resources of an OurGrid resource centre to be exposed as gLite resources –This will be achieved in two steps  Firstly, allow clusters to be exposed as a single resource in an OurGrid resource centre  Secondly, make these resources available at the gLite grid

11 Bogotá, EELA-2 1 st Conference, Latest version of OurGrid just released with support for the exploitation of idle cycles in service grids –Available for download at both:   –Customized installation guide available for sites already running gLite Cluster worker planned for the next release (within a couple of months) Evaluate the impact of the co-existence in a production environment Current status and future work

12 Bogotá, EELA-2 1 st Conference, Concluding remarks More information on the EELA-2 JRA1 activities at the project’s website: – For OurGrid specifities, visit: – Contact me at: Thanks for your attention!