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Providing the Grid Information Service with information of local farms

Providing the Grid Information Service with information of local farms. Massimo Biasotto – INFN LNL Massimo Sgaravatto – INFN Padova. Overview. Overview of information published in GIS by default Analysis of useful information provided by local resource management systems (LSF and Condor)

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Providing the Grid Information Service with information of local farms

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  1. Providing the Grid Information Service with information of local farms Massimo Biasotto – INFN LNL Massimo Sgaravatto – INFN Padova

  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. Default schema: GlobusServiceJobManager

  4. Default schema: GlobusQueue • Many useless fields (always set to 0) • totalnodes and freenodes not correct for LSF

  5. Default schema: GlobusQueueEntry • start time and schedspecific always set to NULL

  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. Proposed schema Service (JobManager) Queue QueueEntry (JobId) • 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.)

  8. Proposed schema: Service • Info on Architecture and OpSys moved to Queue object

  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. Proposed schema: QueueEntry • Info on CpuTime not available in Condor

  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. 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

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