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Copyright 2009-2016 ECMWF. This software is licensed under the terms of the Apache Licence version 2.0 which can be obtained at In applying this licence, ECMWF does not waive the privileges and immunities granted to it by virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.


ecFlow is a work flow package that enables users to run a large number of programs (with dependencies on each other and on time) in a controlled environment. It provides reasonable tolerance for hardware and software failures, combined with good restart capabilities.

ecFlow submits tasks (jobs) and receives acknowledgements from tasks when they change status and when they send events, using child commands embedded in the scripts. Ecflow stores the relationship between tasks, and is able to submit tasks dependent on triggers.



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