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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.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.
Hi Antonio, I would say try h5repack but I just tried that (below) and it also creates files that cannot be read by ncwa. I have not tested chunking using the Java library. It's certainly worth a try. czzender@roulee:~$ time ncks -O -4 --cnk_dmn latitude,4 --cnk_dmn longitude,4 --cnk_dmn time,512 ~/2014.nc ~/2014_ch_ncks.nc
real 2m22.212s user 0m39.139s sys 1m38.901szender@roulee:~$ time nccopy -c time/512,latitude/4,longitude/4 ~/2014.nc ~/2014_ch_nccopy.nc
real 2m21.440s user 0m38.865s sys 1m37.674szender@roulee:~$ time h5repack -l u10m:CHUNK=512x4x4 -i ~/2014.nc4 -o ~/2014_ch_h5repack.nc
real 0m2.683s user 0m0.423s sys 0m0.442s zender@roulee:~$ ncwa -O ~/2014_ch_ncks.nc ~/foo.nc Segmentation fault zender@roulee:~$ ncwa -O ~/2014_ch_nccopy.nc ~/foo.nc*** Error in `ncwa': double free or corruption (fasttop): 0x0000000001f22b70Segmentation fault
zender@roulee:~$ ncwa -O ~/2014_ch_h5repack.nc ~/foo.nc Segmentation fault -- Charlie Zender, Earth System Sci. & Computer Sci. University of California, Irvine 949-891-2429 )'(
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