Update retention rules doc (#15439)

apache · Dec 5, 2023 · 0e14a2c · 0e14a2c
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diff --git a/docs/operations/rule-configuration.md b/docs/operations/rule-configuration.md
@@ -344,6 +344,8 @@ To reload dropped data:
 1. Set your retention period&mdash;for example, change the retention period from one month to two months.
 2. Use the web console or the API to mark all segments belonging to the datasource as `used`.
 
+This prompts Druid to rerun the Coordinator rules and load all missing segments. The Coordinator identifies the latest version of the segments and drops older versions.
+
 ## Learn more
 
 For more information about using retention rules in Druid, see the following topics: