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
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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 ??
