Re: [netcdfgroup] netCDF-C 4.6.2 now available

• To: Ward Fisher <wfisher@xxxxxxxx>
• Subject: Re: [netcdfgroup] netCDF-C 4.6.2 now available
• From: Ed Hartnett <edwardjameshartnett@xxxxxxxxx>
• Date: Tue, 20 Nov 2018 07:41:54 -0700

Congrats Ward!

I know lots of hard work went into this release from you and Dennis at
Unidata. Keep up the good work!

Ed Hartnett

On Mon, Nov 19, 2018 at 12:53 PM Ward Fisher <wfisher@xxxxxxxx> wrote:

> Hello all,
>
> The Unidata netCDF team is happy to announce the release of netCDF-C
> 4.6.2.
>
> Resources:
>
>    - Download source:
>    https://github.com/Unidata/netcdf-c/releases/tag/v4.6.2 or
>    https://www.unidata.ucar.edu/downloads/netcdf/index.jsp
>    - Documentation: https://www.unidata.ucar.edu/software/netcdf/docs
>    - Windows binaries download:
>    https://www.unidata.ucar.edu/software/netcdf/docs/winbin.html
>
> There have been a number of changes since the previous release (many of
> which are captured below). I hope to have netCDF-Fortran 4.5.0 out by the
> end of the week or early next week (given that US Thanksgiving is this
> week), and the C++ interface will follow shortly after that.
>
> Once we turn our attention back to the C library, our next big push will
> be native access to data stored in object storage (Amazon S3, etc). Have a
> great week all, please contact us with any bug reports or questions, thank
> you all for your patience!
>
> Thank you very much all, have a great day,
>
> -Ward
>
> Ward Fisher
> Unidata
> Software Engineer - NetCDF Team Lead
>
> The changes from version 4.6.1 include (but are not limited to):
>
>    - [Enhancement] Lazy att read - only read atts when user requests one
>    of them. See GitHub #857
>    <https://github.com/Unidata/netcdf-c/issues/857>.
>    - [Enhancement] Fast global att read - when global atts are read, they
>    are read much more quickly. See GitHub #857
>    <https://github.com/Unidata/netcdf-c/issues/857>.
>    - [Enhancement] Add nccopy command options for per-variable chunk
>    sizing, and minimum chunk size. See GitHub #1087
>    <https://github.com/Unidata/netcdf-c/pull/1087>.
>    - [Bug Fix] Fix nccopy handling of user specified chunk sizes. See GitHub
>    #725 <https://github.com/Unidata/netcdf-c/issues/725>,#1087
>    <https://github.com/Unidata/netcdf-c/issues/1087>.
>    - [Bug Fix] Avoid limit on number of times a netCDF4 attribute can be
>    updated. Not a complete fix for the HDF5 “maximum creation order” problem,
>    but should greatly reduce occurrences in many real-world cases. See GitHub
>    #350 <https://github.com/Unidata/netcdf-c/issues/350>.
>    - [Bug Fix] The use of NC_DISKLESS has been modified to make it
>    cleaner. This adds a new flag called NC_PERSIST that takes over the now
>    obsolete NC_MPIPOSIX.
>    - [Obsolete] Obsolete the MPIPOSIX flag.
>    - [Bug Fix] When using filters with HDF5 1.10.x or later, it is
>    necessary to utilize the HDF5 replacements for malloc, realloc, and free in
>    the filter code.
>    - [Enhancement] Create a new version of _NCProperties provenance
>    attribute. This version (version 2) supports arbitrary key-value pairs. It
>    is the default when new files are created. Version 1 continues to be
>    accepted.
>    - [Enhancement] Allow user to set http read buffersize for DAP2 and
>    DAP4 using the tag HTTP.READ.BUFFERSIZE in the .daprc file.
>    - [Enhancement] Allow user to set http keepalive for DAP2 and DAP4
>    using the tag HTTP.KEEPALIVE in the .daprc file (see the OPeNDAP
>    documentation for details).
>    - [Enhancement] Support DAP4 remote tests using a new remote test
>    server locatedon the Unidata JetStream project.
>    - [Enhancement] Improved the performance of the nc_get/put_vars
>    operations by using the equivalent slab capabilities of hdf5. Result is a
>    significant speedup of these operations. See GitHub #1001
>    <https://github.com/Unidata/netcdf-c/pull/1001> for more information.
>    - [Enhancement] Expanded the capabilities of NC_INMEMORY to support
>    writing and accessing the final modified memory. See GitHub #879
>    <https://github.com/Unidata/netcdf-c/pull/879> for more information.
>    - [Enhancement] Made CDF5 support enabled by default. See Github #931
>    <https://github.com/Unidata/netcdf-c/issues/931> for more information.
>    - [Bug Fix] Corrected a number of memory issues identified in ncgen.
>    See GitHub #558 for more information
>    <https://github.com/Unidata/netcdf-c/pull/558>.
>
> _______________________________________________
> NOTE: All exchanges posted to Unidata maintained email lists are
> recorded in the Unidata inquiry tracking system and made publicly
> available through the web.  Users who post to any of the lists we
> maintain are reminded to remove any personal information that they
> do not want to be made public.
>
>
> netcdfgroup mailing list
> netcdfgroup@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe,  visit:
> http://www.unidata.ucar.edu/mailing_lists/

• References:
  • [netcdfgroup] netCDF-C 4.6.2 now available
    • From: Ward Fisher