[ncl-talk] Grib index files

[Dave Allured - NOAA Affiliate]

NCL support,

Have you ever considered supporting index files as a way of speeding up
read access for very large Grib1 and Grib2 files?  Apparently the CDO tool
suite uses this feature with some success.

I ran a quick test on a 20 Gbyte Grib2 forecast file from NCEP, with NCL
6.3.0 on a Linux 64-bit platform.  The file contained 33672 records.  It
took 3.1 minutes to simply open this file with addfile, presumably because
NCL scanned the entire file for metadata.

--Dave
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20160815/409d3120/attachment.html