Peter Marshallpmio.hashnode.dev·Apr 6, 2023Notes on roll-up effectiveness in Apache DruidI thought I’d share some lessons I learned over the last few years about ingestion-time aggregation in Druid, and how cardinality affects it. This is kinda a little process I go through mentally that I thought would be helpful to share! What is roll-...111 readsapachedruidAdd a thoughtful commentNo comments yetBe the first to start the conversation.