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Overview of Condor and Grid Computing: Matchmaking, Scalability, and Credential Handling

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This document delves into the capabilities of Condor within grid computing environments. Key topics include supported grid types, matchmaking mechanisms, GlideIn functionality, credential handling, and scalability challenges. Additionally, it explores interactions with firewalls, monitoring, validation, and troubleshooting strategies. Various submission frameworks such as Pre-WS GRAM, OGSA GRAM, and NorduGrid are examined, alongside specific configurations for submitting jobs to Condor and other grid systems. This resource is essential for understanding effective grid resource management and job scheduling.

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Overview of Condor and Grid Computing: Matchmaking, Scalability, and Credential Handling

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  1. Condor and Grids

  2. Potential Topics • Supported grid types • Matchmaking • GlideIn • Credential handling • Scalability • Firewalls • Monitoring & validation • Troubleshooting

  3. Potential Topics • Supported grid types • Matchmaking • GlideIn • Credential handling • Scalability • Firewalls • Monitoring & validation • Troubleshooting

  4. Pre-WS GRAM • Submit filegrid_resource = gt2 \ foo.edu/jobmanager-pbsglobus_rsl = (queue=long)\ (condor_submit=(universe java))

  5. OGSA GRAM • Submit filegrid_resource = gt3 http://foo.edu/\ ogsa/services/base/gram/\ PBSManagedJobFactoryServiceglobus_rsl = (queue=long)\ (condor_submit=(universe java)) • Museum mode

  6. WS GRAM • Submit filegrid_resource = gt4 foo.edu PBSglobus_xml = <queue>long</queue>

  7. NorduGrid • Submit filegrid_resource = nordugrid foo.edunordugrid_rsl = (queue=long)

  8. Unicore • Submit filegrid_resource = unicore usite.org vsitekeystore_file = keystorekeystore_passphrase_file = keystore.pwkeystore_alias = my cert

  9. Condor • Submit filegrid_resource = condor schedd.foo.edu \ cm.foo.eduremote_universe = java

  10. PBS • Submit filegrid_resource = pbs

  11. LSF • Submit filegrid_resource = lsf

  12. Matchmaking • Job Adgrid_resource = $$(ResourceName)requirements = TARGET.ResourceName \ =!= Undefinedrank = random()

  13. Matchmaking • Machine AdMyType = “Machine”TargetType = “Job”Name = “foo.edu”Machine = “foo.edu”ResourceName = “gt4 foo.edu PBS”UpdateSequenceNumber = 4Requirements = TARGET.JobUniverse == 9 && \ CurMatches < 10CurMatches = 0Rank = 0.0CurrentRank = 0.0WantAdRevaluate = True

  14. Matchmaking • Advertising a resourcecondor_advertise UPDATE_STARTD_AD \ ad-file • Call periodically • Use unix time for UpdateSequenceNumber

  15. MyProxy • Submit fileMyProxyHost = foo.edu:12345MyProxyServerDN = /DC=org/DC=doegrids…MyProxyCredentialName = proxy_fileMyProxyRefreshThreshold = 240 #minsMyProxyNewProxyLifetime = 12 #hrsMyProxyPassword = password • Or give password on command linecondor_submit -p password submit.desc

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