Release and Versioning Scheme for Event Broker Services

  • Beginning with the release of event broker service version 10.25.0, event broker version releases for PubSub+ Cloud have a two-week release cadence and a two-year support cycle.

  • Event broker services released prior to version 10.25.0 use a different versioning scheme. For more information about releases before 10.25.0, see Release and Versioning Scheme of Event Broker Services prior to 10.25.0.

Solace does not use semantic versioning for our releases of PubSub+ software event brokers. In PubSub+ Cloud, event broker services use a four-segment A.B.C.D numbering scheme that aligns to the same release and version of the underlying PubSub+ software event broker.

The A.B portion of the numbering scheme specifies the major release (A) and year (B) of the event broker, while the C specifies the release type and D identifies the build number for maintenance releases.

The numbering scheme of event broker services works as follows:

  • A.B identifies the major release and year of the PubSub+ software event broker.

    For example, in version 10.25.0.123, "10" is the major release number and "25" indicates the year 2025.

  • C specifies the release type. There are three types of releases:

    • 0—Long-Term Support (LTS) release: A production-ready release available in June of each year, featuring two years of support and biweekly maintenance releases.
    • 1+—Rolling release: A generally-available release intended for new feature introduction, released every two weeks after the LTS release. Each rolling release receives support for two years, but does not receive maintenance releases. For example, 10.25.2.0 is a rolling release issued four weeks after the LTS release.

  • D identifies the build number of a maintenance release for the LTS releases of PubSub+ software event broker. Maintenance releases include security fixes and product fixes. For example, 10.25.0.123 is a maintenance release of the 10.25.0 LTS release.

  • E specifies the revision of a release and version of a software event broker in PubSub+ Cloud. E resets to zero (0) when B (the release year) changes. A value of zero for E indicates a first revision of a specific software event broker release (A.B). E increments as new maintenance and Rolling release versions are made available.

    Solace can release a specific version of a software event broker in PubSub+ Cloud more than once to address cloud-related dependencies. For example, 10.25.0.300-123 and 10.25.0.300-145.

For more specific information about the types of PubSub+ Cloud releases available, see Types of Releases in PubSub+ Cloud.