A1260338421EHAFj

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A Service Migration Case StudyMigrating the
Condor Schedd
Joe Meehean and Miron Livny Computer Sciences
Department University of Wisconsin-Madison Madison
, WI 53706 jmeeheanmiron_at_cs.wisc.edu April 8,
2005
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• High Throughput Computing System
• Established in 1985
• Developed and supported by at team of 40
  faculty, full-time staff, and students
• Funding DoE, NASA, NIH, NSF, EU, INTEL, Micron,
  Microsoft, and the UW Graduate School
• UW-Madison pool of over 1000 machines yeilded
  over 52.3 computation years just in the month of
  March
• www.cs.wisc.edu/condor

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Condor Archictecture
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Design Goals

• Similar behavior
• User-space
• No residual depedencies
• No uniform file access
• No uniform OS or hardware architecture
• No specialized compiler
• Temporary unavailability
• Service modifications

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Migration Infrastructure
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Future Work Questions?
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Performance Analysis

• Hardware
• Intel P4 2.4 Ghz
• 512MB RAM
• Linux 2.4.21
• Methodology
• Submit 1, 10, and 100 jobs of size 100KB, 1MB,
  and 10MB
• Checkpoint and restart schedd
• Each test was repeated 5 times

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Checkpoint Times
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Restart Times
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Image Size