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Welcome to the WMS web

What is the WMS

The Workload Management System (WMS) is a software service of the gLite/EMI middleware 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.

gLite WMS software

EMI WMS Software


Documentation for EMI versions

Documentation for gLite versions

Documentation for administrators

Documentation for users

Other documentation concerning the WMS

Papers and Presentations

Testing and Certification



EMI 1 Release

Contacts and Support

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Topic revision: r14 - 2011-07-13 - AlessioGianelle
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