Release Notes for NorduGrid ARC 6.0.0

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May 29, 2019

We are very happy to announce the first release of the ARC 6 release series.

ARC 6 comes with major re-engineering in the code base leading to improvements in the deployment, configuration, maintenance and scalability of ARC CE. It introduces many new features while some legacy interfaces, components and features have been obsoleted and removed.

Despite all the new features and code changes the supported ARC 6 CE interfaces are unchanged - the latest ARC 5 clients are compatible with an ARC 6 CE and vice versa.

With ARC 6 we hope to have greatly enhanced the ease of setting up, configuring and managing an ARC production site, and to have improved the reliability and scalability of the ARC CE by the internal restructuring ARC has undergone.

Important Changes

Removed and Obsoleted Components

Known Issues and Notes

Bugs Fixed Since ARC 5

A long (but not exhaustive) list of bugs fixed since ARC 5 can be found here and at the end of these release notes.


The ARC 6 documentation has been rewritten in a modern format and is placed at a new location.

Please note that although the most important parts of the ARC 6 documentation are in place, it is still not fully complete. If you have questions, please contact us!

Installing ARC 6

We recommend to install ARC release using the Nordugrid repository.

We provide binary builds for the following systems:

Future Support of ARC 5-series

Now that ARC 6.0.0 is released, we will only provide security updates of ARC 5.

In particular:

  1. No new feature development is planned or going on for ARC5 and no bug-fixing development will happen on ARC5 code base in the future except for security issues.
  2. Security fixes for ARC5 will be provided till end of June 2020.
  3. Production Sites already running ARC 5 will be able to get deployment and configuration troubleshooting help via GGUS till end June 2021. This we call "operational site support".
  4. ARC5 is available in EPEL7 and will stay there. EPEL8 will only contain ARC 6.

Getting in Touch

If you need help with the configuration file or have any other questions related to ARC 6, please contact us via

List of Bugs Fixed Since ARC 5

Previous releases

Details of previous releases can be found at the ARC Releases page

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