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Blosc2

License information

Blosc2 is distributed under a BSD license a copy of which can be found in the LICENSE.txt file in the GitHub repository.

After installing and loading the module, this file can also be found in $EBROOTBLOSC2/share/licenses/Blosc2.

User-installable modules (and EasyConfigs)

Install with the EasyBuild-user module: 

eb <easyconfig> -r
To access module help after installation and get reminded for which stacks and partitions the module is installed, use module spider Blosc2/<version>.

EasyConfig:

Technical documentation

Installing Blosc2 turns out to be a painful affair and we're not sure the configuration is optimal. It very much likes internal builds of the dependencies, but the consequences when linking with other libraries that have been compiled with external versions, is not clear.

EasyBuild

Version 3.2.3 for 26.03

  • We started from the EasyBuilders EasyConfig but it turned out that that was a very bad one as it downloaded lz4, zstd, zlib-ng and zfp in the background, all codes that we have.

  • Choice:

    • Use external packages (which we choose)

    • Put sources where Blosc2 an find them (there are CMake flags for that). It looks like it would really embed that code in the libraries, but I'm not sure yet if it could cause name conflicts when the original is also linked.

  • Still difficulties with zlib. As soon as we use an external lz4 and zstd, it doesn't seem to pick zlib up anymore. It could be because it only comes in as a dependency for building zstd?

Version 2.23.1 for 26.03

  • Developed because it turned out that ADIOS2 doesn't like the 3.x versions of Blosc2.

  • This version does not download external sources but already includes them. Yet we chose to use external versions.

  • Same issue with zlib as we had with version 3.2.3.