1. LNL M.Biasotto, Bologna, 20 novembre 2000 1 Providing the Grid Information Service with information of local farms Massimo Biasotto – INFN LNL Massimo Sgaravatto – INFN Padova

2. LNL M.Biasotto, Bologna, 20 novembre 2000 2 Overview  Overview of information published in GIS by default  Analysis of useful information provided by local resource management systems (LSF and Condor)  First proposal of a new schema  Conclusions and future work

3. LNL M.Biasotto, Bologna, 20 novembre 2000 3 Default schema: GlobusServiceJobManager

4. LNL M.Biasotto, Bologna, 20 novembre 2000 4 Default schema: GlobusQueue  Many useless fields (always set to 0)  totalnodes and freenodes not correct for LSF

5. LNL M.Biasotto, Bologna, 20 novembre 2000 5 Default schema: GlobusQueueEntry  start time and schedspecific always set to NULL

6. LNL M.Biasotto, Bologna, 20 novembre 2000 6 Info provided by local RMS  Both LSF and Condor offer commands to get exhaustive information on the status of the farm  LSF main commands: –bhosts, lshosts, lsload: hosts info –bqueues: queues info –bjobs: jobs info  Condor main commands: –condor_status: hosts info –condor_q: jobs info

7. LNL M.Biasotto, Bologna, 20 novembre 2000 7 Proposed schema  Farm represented by a set of queues  Each queue is a set of “homogeneous” resources  LSF: supports queues  Condor: single queue (set of hosts in Condor pool sharing same architecture and O.S.) Service (JobManager) Queue QueueEntry (JobId)

8. LNL M.Biasotto, Bologna, 20 novembre 2000 8 Proposed schema: Service  Info on Architecture and OpSys moved to Queue object

9. LNL M.Biasotto, Bologna, 20 novembre 2000 9 Proposed schema: Queue  TotalCpus and FreeCpus correctly defined  Info on Cpu power not available in LSF  Publish info on users?  Publish info on scheduling policies?

10. LNL M.Biasotto, Bologna, 20 novembre 2000 10 Proposed schema: QueueEntry  Info on CpuTime not available in Condor

11. LNL M.Biasotto, Bologna, 20 novembre 2000 11 Implementing the new schema  Two options available: –modify LDAP objects in current default schema –create new LDAP objects  Second approach is preferable: –doesn’t require changes to Globus source code –more flexible for future extensions  First version of scripts to compute LSF TotalCpus and FreeCpus: –more testing needed –send them to globus-discuss mailing list?

12. LNL M.Biasotto, Bologna, 20 novembre 2000 12 Future work  Current proposal based only on LSF and Condor: take into account other Resource Management Systems (PBS)  Implementation of the new schema  Future use will provide suggestions for changes and extensions to this preliminary schema