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.
Norman Fomferra wrote:
Hi John, Thank you very much for your help. Is a support for "real" HDF5-like structures planned? And if so, when?
I assume you mean when can you write Structures? That would be when the netcdf-4 file structure is final, which is ...
waiting for the HFD5 version 1.8 release before the format will be supported. The alpha release uses some format artifacts that will not be required when HDF5 1.8 is released from NCSA, and we don't want to continue to support those artifacts. HDF5 version 1.8 is expected soon, maybe in April if there are no unanticipated problems. For more details on netCDF-4, a paper is available here in PDF or Word form: http://www.unidata.ucar.edu/software/netcdf/papers/2006-ams.pdf http://www.unidata.ucar.edu/software/netcdf/papers/2006-ams.doc and a 15-minute recorded presentation given in January is available here: http://ams.confex.com/ams/Annual2006/techprogram/paper_104931.htm
There will probably be another month or so after that to get the changes into the Netcdf-Java library
In general, we prefer the use of NetCDF over HDF because of its pure Java API. We even still have some unsolved problems with the native HDF libs. So hopefully, UNIDATA will continue working on the NetCDF specs and Java implementation.
Yes we will!!
There is also still room for runtime performance improvements. Especially the frequent reallocation of arrays, lists of ranges and indexes in the API can make up to 20% of processing time besides pure java.io calls (-Xprof).
For sure. I hope to do a "performance improvement" release, but it probably has to wait for a bunch of other stuff, including netcdf-4. Please feel free to let me know of any specific slowdowns, and i will investigate when i can. Thanks for your feedback!
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