Describe the New Feature

MET issue dtcenter/MET#1926 and corresponding PR dtcenter/MET#1977 adds an initial level of OpenMP support to MET for the met-10.1.0_beta5 development release. The initial implementation applies only to the computation of the fractional coverage fields computed by Ensemble-Stat and Gen-Ens-Prod. However, this support will be expanded in future versions.

The OMP_NUM_THREADS environment variable defines the number of threads to be used by OpenMP. If left unset, a single thread is used by default. Recommend adding a new METplus configuration option to define the number of threads the used. The functionality for this is very simple. Just take the setting from the [config] section and use it set the OMP_NUM_THREADS environment variable prior to running the MET tools.

One question is what name to use for the [config] section entry.

• Calling it OMP_NUM_THREADS would be very clear and consistent with the environment variable. However, differentiating between the OMP_NUM_THREADS config option and the environment variable of the same name could cause confusion.
• Calling it METPLUS_NUM_THREADS or MET_NUM_THREADS would avoid that confusion, but perhaps cause other types of confusion?

Acceptance Testing

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Describe tests required for new functionality.

Time Estimate

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Issues should represent approximately 1 to 3 days of work.

Sub-Issues

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Relevant Deadlines

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Define Related Issue(s)

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• METplus, MET, METdatadb, METviewer, METexpress, METcalcpy, METplotpy

New Feature Checklist

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