Makrand Siddhabhatti Tata Institute of Fundamental Research Mumbai 17 Aug

 gLite Component * WMS (Workload management System) * Computing Element * Worker Node * Monitoring Node * Storage Element * User Interface contd… 17 Aug

 gLite Architecture * Meta Scheduler * Local Resource Manager (LRM) * Virtual Organization Management Service (VOMS) * gLite Information Services  gLite Security  Advance Topics * AMGA Metadata Catalogue Service * GANGA – The Job submission Tool * SRM-SRB 17 Aug

 Authentication and Authorization of User.  Accept Request From user.  Selection of Appropriate Computing Element.  Keep Track of Jobs and their status. Also termed as Resource Broker. 17 Aug

5 WMS UI Grid Site (CE+SE+WN) Information Service File Catalogue WN

 Head Node of Grid Site.  Working As a Site BDII (Grid information index Server).  Meta Scheduler (Maui).  Batch Server for Worker Node (pbs_server/LSF daemon).  Operating GRIS (Grid information index Server) 17 Aug

7 CE+ Site BDII (GRIS) (Pbs_server) (Maui scheduler) WN GIIS WMS MON

 Node of Actual Job Execution.  Working as client for CE (pbs_mom/LSF daemon).  Update CE about the job Status.  Work in private network but should able to contact outside world. 17 Aug

 Used to Publish the information about site.  Based on RGMA (Relational Grid Monitoring Architecture). * rgma-server and rgma-client daemons.  Publish information to Top Level BDII. 17 Aug

 StoRM (Storage Resource Manager) used to access the storage.  Types of SE’s * DPM (Disk Pool Manager) * dCache * Castor  Identification of files by GUID’s, LFN’s, SURL’s. 17 Aug

 Entry Point of Users to access the Grid Infrastructure with Valid Grid Certificate and VOMS membership.  Job Submission.  Job Output retrieval. 17 Aug

Meta Scheduler : It is a job scheduler containing the policy regarding execution of jobs. LRM : Responsible for receiving, creating and placing jobs into execution. VOMS : A facility provides the sharing of resources for the member associated with similar operation or experiments. 17 Aug

17 Aug GRIS (At Each Resources) GIIS (Site BDII) Top BDII

 Authorization and Authentication.  Public Key Infrastructure (PKI).  SSL Protocol, authentication based on sharing of public keys. 17 Aug

 Identification of the end point of communication called as Authentication.  Verification of accessing virtual organization and there resources called as Authorization. 17 Aug

 It is cryptographic term, demonstrate an arrangement of binding the user’s public key to its Certification Authority.  Secure Socket Layer protocol is used to made an encrypted communication between web server and browser.  Generated Private key is stored in the browsers pool and public key will be sent to certification authority for signature. 17 Aug

Arda Metadata Grid Application  Users needs an efficient mechanism to describe and locate file over grid, can be done by adding attribute to file.  Metadata, is the list of attributes and there values associating with entries.  Based on lightweight and streamed protocol. 17 Aug

 It is frontend interface for users to submit and manage jobs on grid environment.  GANGA Architecture contains * Client * Application Manager * Job Manager * Job Repository and File workspace 17 Aug

 SRB, Storage Resource Broker is a file management system based on client-server architecture, support heterogeneous data storage resources.  SRM, Storage Resource Manager is protocol to manage storage resource and provide space management. * Handling mapping between LFNs, GUIDs and SURLs. * NOT a file Access protocol. * Provide uniform interface to heterogeneous storage resources 17 Aug

Questions !!! 17 Aug

Thank You. 17 Aug