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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.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 John, >From what I understand, parallel I/O is a netcdf-4 specific feature, and that would have to be the big one I'm interested in. I have worked in 2007 on a project with distributed runs whose outputs were then collated from many (text!) files. I/O was the clear bottleneck in several modelling steps. I am thus interested in better techniques to handle parallel I/O in write mode. Chunking attracted my attention but I do not have a clear idea whether this would alleviate known issues and how. Other features missing in write mode in the Java implementation (e.g. groups if I get it right) sound nice but do not address main issues (maybe only because I am not aware of them). The choice of Java vs C or C++ is based on partiality and familiarity so far: I needed to reuse some C# code, and the netcdf Java jar files converted to .NET assemblies with IKVM (www.ikvm.net) worked well so far. Unless there is an incentive to use the C libs (performance, feature set, etc.) over Java I think most of my colleagues would prefer the latter. Jean-Michel -----Original Message----- From: John Caron [mailto:caron@xxxxxxxxxxxxxxxx] Sent: Tuesday, 12 August 2008 6:45 AM To: Perraud, Jean-Michel (CLW, Black Mountain) Cc: netcdf-java@xxxxxxxxxxxxxxxx Subject: Re: [netcdf-java] Roadmap or intent for netcdf-java to write netCDF4 Hi Jean-Michel: Can you specify exactly what features you are interested in being available in C library? Context such as why C vs Java would be helpful. John Jean-Michel.Perraud@xxxxxxxx wrote: > Hi, > > I have been testing netcdf-java 4.0 alpha to read spatio-temporal 'legacy' data and write it to netcdf3. After a bit of trial and error starting from the tutorial it worked great and I liked the 'feel' of the API, hence an interest for longer term use in other projects. > > Is there an update on the possibility of having the same features as the C API notably writing to netCDF4? Without elaborating I think I'll need it for some purposes. I can fathom the difficulty involved, as conveyed in http://www.unidata.ucar.edu/mailing_lists/archives/netcdf-java/2006-Sept ember/000212.html. > > I'd appreciate if someone at Unidata could give me their best guess on that feature, if possible. No strings attached with the answer, of course. > > Cheers > Jean-Michel Perraud > CSIRO Land and Water > > > _______________________________________________ > netcdf-java mailing list > netcdf-java@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
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