multio

multio is a package developed by ECMWF that provides an application programming interface (API) for

I/O-server functionality for distributed earth-system models,
post-processing pipelines of user-programmable list of actions.

The fundamental design principle behind multio is that data is decoupled from metadata, and that the metadata is used for routing the data through the post-processing pipelines.

Documentation

The documentation can be found at https://multio.readthedocs.io.

Requirements

Runtime dependencies:

eccodes -- http://github.com/ecmwf/eccodes
eckit -- http://github.com/ecmwf/eckit
metkit -- http://github.com/ecmwf/metkit

Optional runtime dependencies:

fdb -- http://github.com/ecmwf/fdb
fckit -- http://github.com/ecmwf/fckit (for the fortran example code only)

Build dependencies:

CMake -- For use and installation see http://www.cmake.org/
ecbuild -- ECMWF library of CMake macros (available via apt or see https://github.com/ecmwf/ecbuild)
MPI -- an implementation of MPI may be required for the I/O-server functionality, see https://www.mpi-forum.org/

Installation

multio employs an out-of-source build/install based on CMake.

Make sure ecbuild is installed and the ecbuild executable script is found ( which ecbuild ).

Now proceed with installation as follows.

Set up environment as appropriate

srcdir=$(pwd)
builddir=build
installdir=$HOME/local

Run Cmake/ecbuild
```
ecbuild --prefix=$installdir -- -DCMAKE_PREFIX_PATH=<path/to/dependencies/install> $srcdir
```
The package is in active development and the I/O-server functionality is not enabled by default, so it needs to be turned on explicitly. In addition, if built with FDB support, some compilers will require linking to be forced.
```
ecbuild --prefix=$installdir -- -DCMAKE_PREFIX_PATH=<path/to/dependencies/install> -DECBUILD_EXE_LINKER_FLAGS=-Wl,--no-as-needed $srcdir
```
Compile, test and install
```
make -j10
ctest
make install
```

GIT hooks

Please run the following command in the project root to use our git hooks:

git config core.hooksPath .githooks

Copyright and license

This software is licensed under the terms of the Apache Licence Version 2.0 which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.

In applying this licence, ECMWF does not waive the privileges and immunities granted to it by virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.

Metadata

Release files for pymultio 2.12.0.33

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Built distributions (wheels)

Table of built distributions (wheels) for pymultio 2.12.0.33
File	Interpreter	ABI	Platform	Reset
pymultio-2.12.0.33-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details
pymultio-2.12.0.33-5-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details
pymultio-2.12.0.33-4-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details
pymultio-2.12.0.33-3-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details
pymultio-2.12.0.33-2-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details
pymultio-2.12.0.33-1-py3-none-any.whl 22.2 kB Oct 16, 2026	Python 3	none	any	Details

Total release size: 133.5 kB

Release files / pymultio-2.12.0.33-py3-none-any.whl

Download URL	pymultio-2.12.0.33-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`352022849acf8f25525f53eda0e10083113d35979d7b4ec206aad4c071312d2c`
BLAKE2b-256 checksum How to use checksums	`5f067c87ab2c50769b00a451004b05b5a84f18a8f09e7c53e427c679a1d57a08`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.11.16`

Release files / pymultio-2.12.0.33-5-py3-none-any.whl

Download URL	pymultio-2.12.0.33-5-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`ec4df8ea68031331e4a70813e6e48868e42028e1992a03db742a5be9216503f6`
BLAKE2b-256 checksum How to use checksums	`65327f52e4e3e172bf4e3459076404ee93ceb85c04e3e0fec6ec5d18f2dbdb5a`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.9`

Release files / pymultio-2.12.0.33-4-py3-none-any.whl

Download URL	pymultio-2.12.0.33-4-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`e7a59fd142089ee06dbe1060d1a5aea07553e245977f9a9bd1c3e49e2236d163`
BLAKE2b-256 checksum How to use checksums	`bc5e1c68c71d17f2156b8bade78c60d064a3b077fa22ef539bfb543f9b2dca6a`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.5`

Release files / pymultio-2.12.0.33-3-py3-none-any.whl

Download URL	pymultio-2.12.0.33-3-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`8eacdb2d25c341d3f943bea435fdb773db78cbcfb69f4eae062336f9d137690a`
BLAKE2b-256 checksum How to use checksums	`719a7517a31c682909fec838785a72d136cebddf5010afd5d853d55f996756f1`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.13.2`

Release files / pymultio-2.12.0.33-2-py3-none-any.whl

Download URL	pymultio-2.12.0.33-2-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`51615d1c00e47ee23e7a25b9bb41afc80d6a4052a6ddd6312faccc133ee43958`
BLAKE2b-256 checksum How to use checksums	`29d70938c986a4a3abc7023d16ac6878e177a79a7cdcf531b77e2fbe2a3f77ba`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.11.14`

Release files / pymultio-2.12.0.33-1-py3-none-any.whl

Download URL	pymultio-2.12.0.33-1-py3-none-any.whl
Size	22.2 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`310d06202c1af331ef4dc51453d2cfec2b424ed6fb9223311c4376d9eea986a8`
BLAKE2b-256 checksum How to use checksums	`c7c4e1209fdf005c67839e23a97275422ffb0c23a7a0050347383b7bf25ea9c9`
Upload date	Oct 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.11.11`