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Application Environment Load Balancing Job and Queue Management

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Application Environment Load Balancing Job and Queue Management. Tim Smith CERN/IT. Application Environment. Uniform environment variables HEPiX scripts initialise user environment identically interactive and batch Uniform file access Home directories are AFS Uniform tool access

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Application Environment Load Balancing Job and Queue Management

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  1. Application EnvironmentLoad BalancingJob and Queue Management Tim Smith CERN/IT

  2. Application Environment • Uniform environment variables • HEPiX scripts initialise user environment identically interactive and batch • Uniform file access • Home directories are AFS • Uniform tool access • SUE / ASIS to make all same tools available in same places on all architectures • Uniform library access • Mainly shared file systems, some local instl Tim Smith: LCCWS in FNAL

  3. Load Balancing • Interactive • ISS • 2 central servers - run probe metrics cluster clients • Choose ‘least’ loaded and update DNS servers • lxplus.cern.ch >> lxplus.plus.cern.ch • Batch • LSF multi-clusters • Interactive submission cluster • Batch execution cluster • Multiple user communities; chaotic and production usage Tim Smith: LCCWS in FNAL

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