Sandbox terminology » History » Version 2
Herve Caumont, 2013-06-20 15:04
| 1 | 1 | Herve Caumont | h1. Sandbox Terminology and Definitions |
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| 3 | This page contains the CIOP terminology and definitions |
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| 5 | h2. Directed Acyclic Graph (DAG) |
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| 7 | In mathematics and computer science, a Directed Acyclic Graph (DAG), is a directed graph with no directed cycles. DAGs may be used to model several different kinds of structure. By definition a DAG is a directed graph with no path that starts and ends at the same vertex. |
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| 8 | This notion is in place in G-POD processing flows and used in ESA EO toolboxes such as BEAM and NeST. |
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| 9 | CIOP uses the DAG to describe the science application +*workflow+*. |
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| 12 | h2. Task |
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| 14 | To exploit the parallelism offered by the CIOP framework, a +*job+* may process its input in several tasks. In principle, the CIOP framework runs the tasks in parallel within a +*job*+. |
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| 15 | A +*job+* can then have one or more +*tasks*+. |