Steve,
the same would be the case with the C library, which would first build
an HDF5 image in memory and stream the complete image once the file is closed
and the length is known and fixed.
Of course, this approach only works as long as the HDF5 file fits into
memory, larger files would need to be split into smaller ones.
Werner
On Fri, 10 Sep 2010 14:37:43 +0200, Steve Sullivan <[email protected]> wrote:
Werner,
Using a network interface is not possible with this API.
It does not write the file sequentially. For example, the
file length is computed after writing all the data, and the
the API then writes the file length into the file header.
Steve
On Fri, Sep 10, 2010 at 09:49:16AM +0200, Werner Benger wrote:
Steve,
does or will the pure Java HDF5 support writing a file image to a TCP/IP
socket instead of a file? In HDF5 this is possible through the virtual
file drivers, I'd imagine that using sockets would be even easier in Java
than in C, and could be a nice feature to stream an HDF5 file from a
Java VM through the network or another application.
Werner
On Fri, 10 Sep 2010 05:23:46 +0200, Steve Sullivan <[email protected]> wrote:
Nicholas,
Currently we do plan to continue work on Nujan, but exactly which
features get implemented is not yet known. A lot depends on the
needs of our primary customer, an FAA project. Also if many
users request a certain feature, we may be able to implement it.
As usual, funding will be a determining factor.
Steve
On Fri, Sep 10, 2010 at 10:59:58AM +1000, Nicholas Yue wrote:
Steve Sullivan wrote:
UCAR is releasing a beta version of Nujan, a pure Java writer for
HDF5 and NetCDF4 files. Nujan is 100% open source and is
released under the MIT license.
Nujan creates HDF5 files compatible with HDF5 1.8.5 and later,
and NetCDF4 files compatible with NetCDF 4.1.1 and later.
The primary differences between Nujan and the existing
HDF5 Java writer are:
- Nujan does not depend on any C code, so does not use the JNI
(Java Native Interface)
- Nujan supports a wide set of HDF5 features, but not all.
Details are on the web page.
Details and download are at:
http://www.ral.ucar.edu/~steves/nujan.html
Hi Steve,
It's not clear from the site if it is the design goals of Nujan to
eventually be HDF5 feature complete?
I can understand that it is currently not and may not be for some
time but am keen to find out the Nujan's long term goals.
Regards
_______________________________________________
Hdf-forum is for HDF software users discussion.
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--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Laboratory for Creative Arts and Technology (LCAT)
Center for Computation & Technology at Louisiana State University (CCT/LSU)
211 Johnston Hall, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362
--
___________________________________________________________________________
Dr. Werner Benger Visualization Research
Laboratory for Creative Arts and Technology (LCAT)
Center for Computation & Technology at Louisiana State University (CCT/LSU)
211 Johnston Hall, Baton Rouge, Louisiana 70803
Tel.: +1 225 578 4809 Fax.: +1 225 578-5362
_______________________________________________
Hdf-forum is for HDF software users discussion.
[email protected]
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
