Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Hi John, thanks for your quick response.If I'm going to use a single index (to save time), it can't be named <filename>.gbx, because I want to use one index file for multiple grib files, so I can save the time of making an index each time I read a similar file. I'm assuming the index is a property of the particular fields that are in a file, but not values in the field. If the indices differ depending on the data in the files, then this obviously won't work.
If it can work, then I'd like to specify a specific index file, like 'RR.gbx' to work for all the RR (Rapid Refresh model, actually) files.
By the way, what is "TDS"? -Bill On 2/9/2009 4:14 PM, John Caron wrote:
Hi Bill: If you create the indexes externally, the library will use them (they better be right!). They must be named <filename>.gbx, and placed in the DiskCache.setRootDirectory(). For Grib files, I just noticed that theres some more stuff you have to do. In 4.0, the policy is set seperately from DiskCache. So you need to call GribServiceProvider.setIndexAlwaysInCache( true); // force use the cache for grib index You probably also want to set GribServiceProvider.setIndexExtendMode( IndexExtendMode.none); // never write an index GribServiceProvider.setIndexSyncMode( IndexExtendMode.none); // never sync the index this means that the index will never be created by the library, which is needed if you are in a multi-threaded situation like on a server. This is what the TDS does. Ill add this to the docs. Id like to hear what is your use case that might require this? Bill Moninger wrote:Hello, I understand that I can use DiskCache.setRootDirectory("grib_data"); to set a directory where grib index files will be stored. This allows me to read and process grib files from a read-only directory. However, I recall reading that it is possible to use a pre-defined index file to save the time involved in generating an index file. In spite of a lot of looking I haven't (re)found the documentation that tells me how to do it. My question: how do I tell the netcdf4 reader to use a specified index file (and one that is in a different directory than the data files)? -Bill
-- William R. Moninger http://www-frd.fsl.noaa.gov/~moninger/ NOAA / Earth Systems Research Laboratory / Global Systems Division 325 Broadway, R/GSD1 voice: 303-497-6435 Boulder, CO 80305 fax: 303-497-3329
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