Hey @Christian_C 

Typically, it'd take less than 5 mins for the DLT cluster to spin-up (if not serverless) and would stay active upto 120 minutes if you're in Development mode. 

Serverless DLT has faster initialization times compared to the non-serverless ones. Check this out - https://docs.databricks.com/aws/en/dlt/configure-compute

Hope this helps!