ADIOS 2 : The Adaptable Input Output System version 2

This is ADIOS 2 : The Adaptable Input/Output (I/O) System, ADIOS 2 is developed as part of the United States Department of Energy's Exascale Computing Program.

ADIOS 2 is a framework designed for scientific data I/O to publish and subscribe (put/get) data when and where required.

ADIOS 2 transports data as groups of self-describing variables and attributes across different media types (such as files, wide-area-networks, and remote direct memory access) using a common application programming interface for all transport modes. ADIOS 2 can be used on supercomputers, cloud systems, and personal computers.

ADIOS 2 focuses on:

1. Performance I/O scalability in high performance computing (HPC) applications.
2. Adaptability unified interfaces to allow for several modes of transport (files, memory-to-memory)
3. Ease of Use two-level application programming interface (APIs)
   • Full APIs for HPC applications: C++11, Fortran 90, C 99, Python 2 and 3
   • Simplified High-Level APIs for data analysis: Python 2 and 3, C++11, Matlab

In addition, ADIOS 2 APIs are based on:

• MPI ADIOS 2 is MPI-based, it can be used in non-MPI serial code. Non-MPI 100% serial build is optional.

• Data Groups ADIOS 2 favors a deferred/prefetch/grouped variables transport mode by default to maximize data-per-request ratios. Sync mode, one variable at a time, is treated as the special case.

• Data Steps ADIOS 2 follows the actual production/consumption of data using an I/O “steps” abstraction removing the need to manage extra indexing information.

• Data Engines ADIOS 2 Engine abstraction allows for reusing the APIs for different transport modes removing the need for drastic code changes.

Documentation

Please find The ADIOS 2 User Guide at readthedocs

Getting ADIOS2

• From source: Install ADIOS 2 documentation requires CMake v3.6 or above. For a cmake configuration example see scripts/runconf/runconf.sh

• Conda packages:

  • https://anaconda.org/williamfgc
  • https://anaconda.org/conda-forge/adios2

• Spack: adios2 package

• Docker images:

  • Ubuntu 18.04: under scripts/docker/images/ubuntu18.04/Dockerfile

Once ADIOS 2 is installed refer to:

• Linking ADIOS 2

Releases

• Latest release: v2.6.0

• Previous releases: https://github.com/ornladios/ADIOS2/releases

Reporting Bugs

If you found a bug, please open an issue on ADIOS2 github repository

Contributing

We invite the community to contribute, see Contributor's Guide to ADIOS 2 for instructions on how to contribute. ADIOS 2 will always be free and open-source.

License

ADIOS >= 2.0 is licensed under the Apache License v2.0. See the accompanying Copyright.txt for more details.

Directory layout

• bindings - public application programming interface, API, language bindings (C++11, C, Fortran, Python and Matlab)

• cmake - Project specific CMake modules

• examples - Simple set of examples in different languages

• scripts - Project maintenance and development scripts

• source - Internal source code for private components

  • adios2 - source directory for the ADIOS2 library to be installed under install-dir/lib/libadios2.
  • utils - source directory for the binary utilities, to be installed under install-dir/bin

• testing - Tests using gtest