EGEE-II INFSO-RI Enabling Grids for E-sciencE EGEE and gLite are registered trademarks Grid is a Bazaar of Resource Providers and Virtual Organizations Tomasz Szepieniec, Anna Pagacz ACC CYFRONET AGH Cracow Grid Workshop, Cracow, 16th October 2007

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 2 Grid is a Bazaar Grid Checklist by Ian Foster: A Grid is a system that: coordinates resources that are not subject to centralized control [..] Definition of grid by Vaidy Sunderam: A paradigm/infrastructure that enables the sharing, selection, & aggregation of geographically distributed resources (multiple administrative domains) [..] Policy to provide support require links between PEOPLE! –We cannot avoid this! Consider existing numbers in EGEE: –~200 Sites –~100 active VOs The process of finding suitable resources, negotiating support on sites, configuring support VO on sites, validating the configuration,… … require even more complicated interaction than bazaar

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 3 Motivation – mechanism that make RP interested to provide resources Communication – well defined robust procedures User / VO Manager Resource Provider

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 4 How this works in EGEE? From EGEEII periodic report (SA1 part): „VO must get access to resources […]. Until now this allocation of resources to new VO is not working very well. For the smaller VOs, it is very difficult to negotiate with the resource centres separately” Once a VO registration has been approved by the OAG, the ROC managers as representatives of the RCs in their federation, will find a RC willing to host the VO's VOMS server and authorise the VO on a very restricted set of resources. [..]. The OAG will work with you in parallel to arrange more permanent resources [..] To obtain more resources, the VO manager will have to interact with the OAG and the ROCs. From EGEEII Review Presentation Erwin Laure - Major Issues: - Allocation of resources, in particular to new VOs.

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 5 Typical Scenarios Consider the following scenarios: 1.VO already supported by sites needs more computing power for 1 month starting from next week 2.VO needs increase storage/CPU ratio, so they want to negotiate this with 20 sites and track the process of enabling this 3.RC needs resources for new VO and wants to cut (re-negotiate) resources for already supported VOs. In each case we have negotiations, agreement, re-configuration and approval We need efficient procedure in each case!

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 6 Process Definition Based on Direct Communication VO opens a call (project) for resources and publish it to RCs RC Manager can answer to call by proposing a contract Contract is a negotiated aggrement between single RC and VO Changing contract state requires both VO and RC acceptance

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 7 Need of a Collaboration Tool Many contracts per each VO and RC that would change over time -> we need some tool to manage complexity Requirements for Bazaar tool: –Support for communication including negotiations –Clear view on VO and RC policy –Tracking of executing a contracts and projects –Possibility to provide feedback about sites and VO –Possibility of integration with grid accounting tool –Easy to use

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 8 Negotiations in Bazaar Portal Both parties could propose changes to the 'contract' In this case other party is notified and can accept/reject or continue negotiation of each contract item Number of rounds is not limited

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 9 Status of Bazaar implementation Bazaar v.1.0 is expected to be released until end of 2007, including: –Project and contract management –Tracking of negotiation process – Notification for VO and RC managers –View on policies –Feedback about contract configuration execution Deployment: –Bazaar is being integrated with EGEE CIC Portal and EGEE GOC DB for proper role assignment (according certificates) –It is agreed to use Bazaar in Central European region –There are plans to introduce Bazaar to PL-Grid

Enabling Grids for E-sciencE EGEE-II INFSO-RI Grid is a Bazaar.. - CGW07 10 Summary Real grids require efficient collaboration between VO and RC We defined the process of resources allocation We developed the Bazaar Portal that implement the process