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Condor and Virtual Machines

Condor and Virtual Machines

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Condor and Virtual Machines

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Presentation Transcript

  1. Condor and Virtual Machines

  2. Virtual Machines • Simulated hardware • Software in the VM thinks it’s running on a normal machine

  3. Virtual Machines Real Machine Virtual Machines

  4. Benefits of Virtual Machines • Job sandboxing • Checkpoint and migration • Jobs with elevated privileges • Platform independence

  5. Job Sandboxing • Protect machines from jobs • Both accidental and malicious damage • Machine owners more willing to run unfamiliar jobs

  6. Checkpoint and Migration • State of entire VM (OS and all) is recorded • VM can be checkpointed for… • Failure recovery • Migration to other machines

  7. VM Checkpointing vs. Standard Universe • No relinking • Works with more types of jobs • Multiple processes and threads • Networking (but migration problematic) • No Remote IO • Must specify input files

  8. Jobs with Elevated Privileges • Run as root or administrator user • Alter OS installation • Useful for automated testing of software like Condor

  9. Platform Independence • Jobs can run on more machines • Machines can run more jobs • Linux jobs on Windows machines • And vice versa

  10. Thank You • Any questions? • Virtualization in Condor BoF • Friday, 1:30-2:30