News

Latest Newsletter - #107 Published on May 15, 2009: Latest Official Release of HDF5: 5 1.8.3 - See Newsletter: 107
Latest Official Release of HDF5 1.6: 5 1.6.9 - See Newsletter: 107
Latest Official Release of HDF4: 4.2r4 - See Newsletter: 105
Latest Official Release of the HDF Java Products: 2.5 - See Newsletter: 106

HDF and HDF-EOS Workshop XIII
November 3 - 5, 2009

NASA and The HDF Group invite you to the 2009 HDF and HDF-EOS Workshop, scheduled for November 3rd through November 5th in Riverdale, Maryland.

Please join us for a 3-day workshop to assist users of satellite observations of the Earth and related applications to explore the power of HDF and HDF-EOS. This year's presentations, tutorials, and user forum will focus on identifying and supporting up-and-coming technologies and enhancing HDF support with existing technologies.

Please visit the HDF and HDF-EOS Workshop XIII Page on the HDF-EOS Tools and Information Center web site for the latest details.

May 8, 2009

Latest HDF5 and HDF Group Podcast

Mike Folk and Quincey Koziol of The HDF Group speak about the HDF5 file API.

Bulletin May 29, 2009

RFC: Reporting of Non-Comparable Datasets by h5diff

A Request for Comments (RFC) on the handling of non-comparable datasets by h5diff has just been published. The HDF Group is soliciting feedback on this RFC.

Bulletin March 3, 2009

HDF5 Chunking Performance Improvement

A recent bug fix resulted in a significant improvement in chunking performance. This fix will be available in releases HDF5 1.6.9 and HDF5 1.8.3, due out in May, but the fix is in the latest snapshots.

Bulletin January 14, 2009

American Meteorological Society 89th Annual Meeting

Extended abstracts on work done by The HDF Group were presented at the 89th Annual AMS meeting:

Investigation of using HDF5 Archival Information Packages (AIP) to store NASA ECS Data
Using a friendly OPeNDAP client library to access HDF5 data

These abstracts can also be found on The HDF Group presentations page.

Bulletin January 7, 2009

HDF5 and netCDF-4 Tutorial

The tutorial, HDF5 and netCDF-4: Two Solutions for Data Management Problems based on One File Format will be presented on March 9, 2009 at the 10th LCI International Conference on High-Performance Clustered Computing in Boulder,Colorado.

Registration is now open.

Bulletin December 12, 2008

RFC: Setting Raw Data Chunk Cache Parameters in HDF5

A Request for Comments (RFC) on new functions for setting individual chunk cache parameters for each dataset in HDF5 has just been published.

The HDF Group is currently soliciting feedback on this RFC. Community comments will be one of the factors considered by The HDF Group in making the final design and implementation decisions.

Bulletin November 3, 2008

HDF5 Users BOF @ SC08

The HDF Group will host a Birds-of-a-Feather (BOF) session for HDF5 Users at SC08 on November 19th. Quincey Koziol, Chief Architect for The HDF Group, will discuss features currently under development, answer questions, and gather input for future directions.

Please see the following page for more details: HDF5 BOF Information

Bulletin October 7, 2008

NASA Commits 3.1M to The HDF Group for Earth System Science

As reported on October 1st, 2008 in HPCWire, the HDF Group has received a 3-year contract from the National Aeronautics and Space Administration (NASA) to provide ongoing development and support for the HDF technologies used by NASA's Earth Observing System (EOS).

The contract will be announced at the upcoming 12th HDF & HDF-EOS Workshop in Aurora, Colorado, October 15th through 17th.

Bulletin October 3, 2008

RFC: Native Time Types in HDF5

An RFC has been published for handling Native Time Types in HDF5. The HDF Group is currently soliciting feedback on this RFC. [ PDF ]

Bulletin September 2, 2008

RFC: Special Values in HDF5

A new Request for Comment on the handling of Special Values in HDF5 has been published. The HDF Group is currently soliciting feedback on this RFC. Community comments will be one of the factors considered by The HDF Group in making the final design and implementation decision. Comments may be sent to the The HDF Group Heldesk.

Bulletin August 14, 2008

HDF5-OPeNDAP Used In Tracking Beijing Air Quality

The HDF5-OPeNDAP Project has been used to facilitate the use of HDF-EOS Data to track Beijing air quality. For more information on this, see: HDF5 OPeNDAP Brief 8/14/08 [pdf]

Bulletin June 24, 2008

NetCDF-4 Performance Report

NetCDF-4 is an I/O software package that retains the original netCDF APIs while using HDF5 to store the data. Sponsored by NASA ESTO, netCDF-4 is the result of a collaboration between Unidata and The HDF Group.

The HDF Group has prepared a report on the performance of netCDF-4 that uses benchmarks and examples to:

compare the performance of netCDF-3 and netCDF-4
discuss performance tuning with netCDF-4
discuss performance pitfalls with netCDF-4

Some of the performance tuning and pitfalls discussions may also be of interest to users of HDF5 who do not use netCDF-4. The report is available at:

   http://www.hdfgroup.org/pubs/papers/2008-06_netcdf4_perf_report.pdf