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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Martin Price wrote:
Does anyone know if it's possible to do an Aggregation on an inner dimension (preferably ForecastModelRunCollection but a plain-vanilla aggregation would be fine). We are using NCML to aggregate a lot of model run files (every 6 hours for ~10 years), and most often using the aggregated dataset to extract full length time series. This works fine with time as the outer dimension, but the disk is spending nearly all its time seeking, and we know from tests using hard-coded file access that this runs a lot faster if we permute the files so that time is the inner dimension.I've tried using 'union' or 'joinexisting' ncml to do it - but as you'd expect from the documentation it doesn't work. Is there a way to do this?cheers, Martin -- Martin Price Ocean Forecasting Research and Development Met Office, FitzRoy Road, Exeter, EX1 3PB, United Kingdom Tel: +44 (0) 1392 886982 Fax: +44 (0) 1392 885681 email: mpricemetoffice at googlemail dot com http://www.metoffice.gov.uk ------------------------------------------------------------------------ _______________________________________________ netcdf-java mailing list netcdf-java@xxxxxxxxxxxxxxxxFor list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
Hi Martin: You currently cannot do an aggregation on an inner dimension.Can you give me a use case and perhaps a sample file? Are you extracting a time series at a single point ??
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