How do I check the progress of the load forever/loadForever rule?

Run this query:

SELECT datasource, server, count(*) 
FROM sys.server_segments ss 
INNER JOIN 
sys.segments s ON s.segment_id=ss.segment_id
GROUP BY 1,2 
ORDER BY 1,2

Here’s more about loadForever, here’s more about data retention rules, and here’s some context.

Oh interesting – this is showing how many segments are loaded onto each historical per data source?

I seem to remember there being an API that has a similar function – do you know if the source for this data is the same as the console and the API?