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Release Series

OSG Software releases are organized into release series, with the intent that software updates within a series do will not take require manual configuration updates, cause significant downtime, or break dependent software.

When a new series is released, it is an opportunity for the OSG Software Team to add major new software packages, make substantial updates to existing packages, and remove obsolete packages. When a new series is initially released, most packages are identical to the previous release, but two adjacent series will diverge over time.

Support Policy

The OSG Software Team supports at most two concurrent release series, current and previous, where the goal is to begin a new release series about every 12 months. Once a new series starts, the Software Team will support the previous series until the next release series and will announce its end-of-life date at least 6 months in advance.

When support ends for a release series, it means that the Software Team no longer updates the software, fixes issues, or troubleshoots installations for releases within the series. The plan is to maintain interoperability between supported series, but there is no guarantee that unsupported series will continue to function.

Files for release series older than current or previous will be removed from the OSG Software repositories no earlier than when support ends for the previous release. For example, files for OSG 3.2 were not removed until May 2018, when support ended for OSG 3.3 in May 2018.

Series Overviews

Since the start of the RPM-based OSG Software Stack, we have offered the following release series:

  • OSG 23 (started October 2023) aligns the OSG release series and HTCondor Software Suite release cycles. The initial release includes GlideinWMS 3.10.5, HTCondor 23.0, HTCondor-CE 23.0, and XRootD 5.6.2

  • OSG 3.6 (started February 2021) overhauls the authentication and data transfer protocols used in the OSG software stack: bearer tokens, such as SciTokens or WLCG tokens, are used for authentication instead of GSI proxies and HTTP is used for data transfer instead of GridFTP. See the OSG GridFTP and GSI migration plan for more details. To support these new protocols, OSG 3.6 includes HTCondor 8.9, HTCondor-CE 5, and will include XRootD 5.1.

  • OSG 3.5 started in August 2019 and was end-of-lifed in May 2022. The main differences between it and 3.4 were the introduction of the HTCondor 8.8 and 8.9 series; also the RSV monitoring probes, EL6 support, and CREAM support were all dropped.

  • OSG 3.4 started June 2017 and was end-of-lifed in November 2020. The main differences between it and 3.3 are the removal of edg-mkgridmap, GUMS, BeStMan, and VOMS Admin Server packages.

  • OSG 3.3 started in August 2015 and was end-of-lifed in May 2018. While the files have not been removed, it is strongly recommended that it not be installed anymore. The main differences between 3.3 and 3.2 are the dropping of EL5 support, the addition of EL7 support, and the dropping of Globus GRAM support.

  • OSG 3.2 started in November 2013, and was end-of-lifed in August 2016. The main differences between it and 3.1 were the introduction of glideinWMS 3.2, HTCondor 8.0, and Hadoop/HDFS 2.0; also the gLite CE Monitor system was dropped in favor of osg-info-services.

  • OSG 3.1 started in April 2012, and was end-of-lifed in April 2015. Historically, there were 3.0.x releases as well, but there was no separate release series for 3.0 and 3.1; we simply went from 3.0.10 to 3.1.0 in the same repositories.

Series Life-cycle

Support ends at the end of the month of the following dates unless otherwise specified:

Release Series Initial Release End of Regular Support End of Critical Bug/Security Support
23 October 2023 Not set Not set
3.6 Februrary 2021 31 March 2024 30 June 2024
3.5 August 2019 30 August 2021 1 May 2022
3.4 June 2017 29 February 2020 30 November 2020
3.3 August 2015 31 December 2017 31 May 2018
3.2 November 2013 29 February 2016 31 August 2016
3.1 April 2012 31 October 2014 30 April 2015

Installing an OSG Release Series

See the yum repositories document for instructions on installing the OSG repositories.


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