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gLite WMS : Workload Management System |
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Written by Administrator
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Friday, 12 December 2008 09:05 |
The Workload Management System (gLite WMS) is a software service of the gLite suite which is responsible for distributing and managing tasks across computing and storage resources available on a Grid. WMS assigns user jobs to CEs and SEs belonging to a Grid environment in a convenient fashion, so that:
- jobs are always executed on resources that match the job requirements
- grid-wide load balance is maintained, i.e. jobs are evenly and efficiently distributed across the entire Grid.
The WMS basically receives requests of job execution from a client, finds the required appropriate resources, then dispatches and follows them until
completion. This is done handling failure in between and whenever possible. Other than single batch-like jobs, compound job types handled by the WMS are Directed Acyclic Graphs (a set of jobs where the input/output/execution of one of more jobs may depend on one or more other jobs), Parametric Jobs (multiple jobs with one parametrized description), and Collections (multiple jobs with a common description). Jobs are described via a flexible, high-level Job Definition Language (JDL).
 As a global grid resource broker, the WMS represents a reliable and efficient entry point to high-end services available on a Grid, providing a common front-end for user job submission.
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Last Updated on Wednesday, 15 April 2009 15:50 |
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