CAS EOL Policy Proposal


The CAS project management committee has been reviewing a proposal on CAS release policies, maintenance and lifetime. In particular, this proposal attempts to provide answers to the following questions:

  • How long should a CAS release be maintained?
  • What is the appropriate scope for release maintenance once a release is retired?

Today

The project has been handling release management and maintenance in a semi-official capacity. Today’s release practices typically are:

  • Patch releases, once every 30 days.
  • Minor releases, once every 3-4 months.
  • Major releases, where appropriate based on community demand and technical landscape.
  • Security patches, whenever needed and preferably as soon as humanly possible.

There is no official policy to indicate the lifespan of a CAS release. Maintaining multiple release lines in an adhoc fashion is a very time-consuming and difficult process where the development team has to ensure patches across releases are ported backward or forward correctly and that changesets are properly cherry-picked into the target release, tested, documented and made available.

This process is simply not sustainable.

Proposal

To mitigate some of this pain, the following proposal and a decidedly simple one at that is in the making:

  • CAS adopters MAY EXPECT a CAS release to be maintained for one calendar year, starting from the original release date.
  • Maintenance during this year includes bug fixes, security patches and general upkeep of the release.
  • Once the year is passed, maintenance of the release is STRICTLY limited to security patches and fixing vulnerabilities for another calendar year.
  • The lifespan of a release MAY be extended beyond a single year, to be decided by the CAS PMC and the community at large when and where reasonable.

By “CAS Release”, we mean anything that is a minor release and above. (i.e. 4.1.x, 4.2.x, 5.0.0, 5.1.0, etc).

What does this mean?

The above policy, once in effect, implies that the following CAS releases will transition into a security-patch mode (SPM) only and will be EOLed at the indicated dates.

Release SPM Starting Date Full EOL
4.0.x October 31st, 2016 October 31st, 2017
4.1.x January 31st, 2017 January 31st, 2018
4.2.x January 31st, 2017 January 31st, 2018
5.0.x September 30th, 2017 September 30th, 2018

All past releases that are absent in the above table are considered EOLed.

Misagh Moayyed

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