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Scheduling Interactive Tasks in the Grid-based Systems

Scheduling Interactive Tasks in the Grid-based Systems. TERENA Networking Conference 2005. M. Oko ń , M. Lawenda, N. Meyer, D. Stokłosa, T. Rajtar, D. Kaliszan, M. Stroiński. June 6-9 , 200 5 Poznań , Poland. Chosen aspects of interactive tasks scheduling.

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Scheduling Interactive Tasks in the Grid-based Systems

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  1. Scheduling Interactive Tasks in the Grid-based Systems TERENA Networking Conference 2005 M. Okoń, M. Lawenda, N. Meyer, D. Stokłosa, T. Rajtar, D. Kaliszan, M. Stroiński June6-9, 2005 Poznań, Poland

  2. Chosen aspects of interactive tasks scheduling • Online user presence at the time of task execution • Device operator presence in case of scientific experiments • Resource availability (maintenance, etc.) • Workload management and resource allocation • Interactive connection to graphical user interface • Tasks as elements of dynamic measurements scenarios

  3. Virtual Laboratory overview The Virtual Laboratory is a distributed environment, providing its users with the following functionality: • Remote access to complex and expensive laboratory research equipment • User-customized Dynamic Measurement Scenarios • Digital Science Library • Data storage and management • Educational potential • Workgroup collaboration tools

  4. Dynamic Measurement Scenarios • definition of complex, multi-dimensional research experiment scenarios • connection of experimental and computational jobs • multiple conditions on jobs connections, determining the actual execution path • description language for resources and connection dependencies Example of a simple measurement scenario

  5. Example of DMS diagram

  6. Batch job scheduling

  7. Interactive tasks: Task submission 1. Task is sent to SMM module 4. Grid authorization in GAM 2. Task is added to the DB 5. Accounting verification 3. Task sent to Global Scheduler 6b, 7. Task submitted to GRMS (via Gateway)

  8. Interactive task: VNC session scheduling 1. GRMS checks with MDS for resources 4. Task status updated in VLab DB 2. GRMS verifies free slot for VNC session 3. GG is informed of status change (notification)

  9. Interactive tasks: Establishing a secure connection 1. GRMS launches scheduled task 4. Gateway sends info to Vlab DB (Monitoring) 2. GRMS sends notification to Gateway 3. VNC Manager sends task info 5. User launches SVNC viewer

  10. Interactive tasks: Prolonging the VNC session 1. User request from portal 2. Verification with GAM 3. Accounting verification 4b,5. Request forwarded to GRMS 6. VNC session reservation 7,8. GRMS Answer forwarded and updated in VLab DB

  11. Interactive tasks: Ending the VNC session by the user 1,2. Request to end session forwarded to GRMS 4. Update in the session DB 3. End signal sent to VNC Manager 5,6. Task status updated in the VLab DB

  12. Interactive tasks: Ending the VNC session by the system 1. GRMS sends end signal to VNC Manager 3,4. Task status updated in the VLab DB 2. Update in the session DB

  13. Summary Scheduling of the interactive task creates new possibilities for a wide range of Grid-based systems. Human factor as the main, non-deterministic element influencing the whole process. Invocation of user-interactive tasks can be divided into the following main steps: • Task submission • VNC session scheduling • Establishing secure connection • Ending the VNC session

  14. http://vlab.psnc.pl/ e-mail: Marcin Okoń: hawky@man.poznan.pl or: vlab@psnc.pl

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