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Preview 2.31.0

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APEL-SSM 3.1.1

Secure STOMP Messenger (SSM) is designed to simply send messages using the STOMP protocol or via the ARGO Messaging Service (AMS). Messages are signed and may be encrypted during transit. Persistent queues should be used to guarantee delivery.

SSM is written in Python. Packages are available for RHEL 7 and Ubuntu Trusty.

The installation and configuration guide is available here:

Check also the EGI wiki for more information about APEL SSM.

Release notes:

  • Changed logging to reduce how verbose the logging of a 3rd-party module is.

ARC 6.10.1

The Advanced Resource Connector (ARC) middleware is an Open Source software solution to enable distributed computing infrastructures with the emphasis on processing large volumes of data. ARC provides an abstraction layer over computational resources, complete with input and output data movement functionalities. The security model of ARC is identical to that of Grid solutions, relying on delegation of user credentials and the concept of Virtual Organisations. ARC also provides client tools, as well as API in C++, Python and Java.

After the brief release of ARC 6.10.0 and the retraction quickly after, this release tackles the slowness encountered from the hashing code related to Bug 3980 (GDPR). We at the same time spotted a problem in the accounting code which also has been fixed, see Bug 3992.

Highlights in this release

There are two important updates in this release. The first handles the submitter information in regards to GDPR, and the second fixes a bug causing AREX to crash.

  • Submitters certificate DN and GDPR (Bugzilla 3980).

With ARC 6.10 the submitters DN is now exposed in a hashed format. This means that ARC no longer publishes the submitters DN in clear text and therefore complies with GDPR regulations. Note that the arcsync command from ARC clients version <= 6.9.0 will not work, as the DN's no longer will match. Updating the ARC client is required for arcsync to work.

  • AREX crashes related to the security processing in AREX (Bugzilla 3978).

Some sites experienced regular AREX crashes with the ARC 6.9.0 release. This was due to a bug in the code which handled the detection of failure in the security processing. This is now fixed.

In addition to these important changes, the release contains several other bugfixes and improvements as can be seen in the detailed release notes.

Future Support of ARC 5-series

As of June 2020 no more security updates are provided to ARC 5. Also since the release of ARC 6 in June 2019, no more development on the ARC 5 code base has been provided.

Production Sites already running ARC 5 will still get operational site support in form of deployment and configuration troubleshooting help via GGUS until end June 2021. However, we may recommend upgrading to ARC 6 depending on the issues the site is facing.

ARC5 is available in EPEL7 and will stay there. EPEL8 will only contain ARC 6. To install ARC 6 from EPEL7 the package-names are of type: nordugrid-arc6-*

CVMFS 2.8.0 and egi-cvmfs-3-1.13

The CernVM File System provides a scalable, reliable and low-maintenance software distribution service. It was developed to assist High Energy Physics (HEP) collaborations to deploy software on the worldwide-distributed computing infrastructure used to run data processing applications. CernVM-FS is implemented as a POSIX read-only file system in user space (a FUSE module). Files and directories are hosted on standard web servers and mounted in the universal namespace /cvmfs.

Release notes

CernVM-FS 2.8 is a feature release that comes with performance improvements, new functionality, and bugfixes.

CernVM-FS 2.8 highlights include:

  • A new “service container” aimed at easier kubernetes deployments
  • Support for macOS 11 Big Sur
  • Support for Windows Services for Linux (WSL2)
  • Parallelized garbage collection for greatly reduced GC durations
  • Support for generating podman image store meta-data in DUCC
  • Ability to show the diff of the current transaction using the cvmfs_server diff --worktree command
  • Two new experimental features: “template transactions” and ephemeral publish containers

Please see detailed release notes in the technical documentation.

davix 0.7.6

Davix aims to make the task of managing files over HTTP-based protocols simple. It is being developed by IT-ST at CERN, and while the project's purpose is its use on the CERN grid, the functionality offered is generic. Visit to view the latest documentation.

Release notes:

dCache 5.2.38

dCache provides a system for storing and retrieving huge amounts of data, distributed among a large number of heterogeneous server nodes, under a single virtual filesystem tree with a variety of standard access methods.

Detailed release notes on the official product site:

gfal2 2.18.2

GFAL (Grid File Access Library ) is a C library providing an abstraction layer of the grid storage system complexity. The version 2 of GFAL tries to simplify at the maximum the file operations in a distributed environment. The complexity of the grid is hidden from the client side behind a simple common POSIX API.

Detailed release notes at