@@ -14,6 +14,8 @@ In addition to numerous new and upgraded packages, this release has the followin
1414
1515- PostgreSQL now defaults to major version 13.
1616
17+- spark now defaults to spark 3, updated from 2. A [migration guide](https://spark.apache.org/docs/latest/core-migration-guide.html#upgrading-from-core-24-to-30) is available.
18+
1719- Activation scripts can now opt int to be run when running `nixos-rebuild dry-activate` and detect the dry activation by reading `$NIXOS_ACTION`.
1820 This allows activation scripts to output what they would change if the activation was really run.
1921 The users/modules activation script supports this and outputs some of is actions.
@@ -78,6 +80,8 @@ subsonic-compatible api. Available as [navidrome](#opt-services.navidrome.enable
7880 or sends them to a downstream service for further analysis.
7981 Documented in [its manual entry](#module-services-parsedmarc).
8082
83+- [spark](https://spark.apache.org/), a unified analytics engine for large-scale data processing.
84+
8185## Backward Incompatibilities {#sec-release-21.11-incompatibilities}
8286
8387