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Overview

Delft-FEWS can, within one Forecasting Shell instance, split ensemble workflows (that have the runInLoop element set to true) over multiple cores. Based on the available amount of cores a number of queues is made, one for each core. When running the activity the different ensemble members are added to the different queues. An example of a workflow that can use this feature is shown below. Since FEWS 2017.01 it is optionally possible to run parallel activities on multiple forecasting shells. This can also apply for ensemble workflows as is explained in section 'parallel' on page 06 Configuring WorkFlows.

To split an ensemble activity over multiple cores within one Forecasting Shell instance, use runInLoop=true in the workflow file (see example below) in combination with the global property definition  as explained below the xmlblock:

	<activity>
		<runIndependent>true</runIndependent>
		<moduleInstanceId>MOGREPS_Spatial_Interpolation</moduleInstanceId>
		<ensemble>
			<ensembleId>MOGREPS</ensembleId>
			<runInLoop>true</runInLoop>
		</ensemble>
	</activity>

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