edgar2020 commented on code in PR #16762: URL: https://github.com/apache/druid/pull/16762#discussion_r1692077584
########## docs/tutorials/tutorial-rollup.md: ########## @@ -24,18 +24,21 @@ sidebar_label: Aggregate data with rollup --> -Apache Druid can summarize raw data at ingestion time using a process we refer to as "rollup". Rollup is a first-level aggregation operation over a selected set of columns that reduces the size of stored data. +Apache Druid® can summarize raw data at ingestion time using a process known as "rollup." [Rollup](../ingestion/rollup.md) is a first-level aggregation operation over a selected set of columns that reduces the size of stored data. -This tutorial will demonstrate the effects of rollup on an example dataset. +The tutorial demonstrates how to apply rollup at ingestion and shows the effect of rollup at query time. See [ingesting with rollup](https://druid.apache.org/docs/latest/multi-stage-query/concepts/#rollup) to learn more. -For this tutorial, we'll assume you've already downloaded Druid as described in -the [single-machine quickstart](index.md) and have it running on your local machine. +## Prerequisites -It will also be helpful to have finished [Load a file](../tutorials/tutorial-batch.md) and [Query data](../tutorials/tutorial-query.md) tutorials. +Before proceeding, download Druid as described in [Quickstart (local)](index.md) and have it running on your local machine. You don't need to load any data into the Druid cluster. -## Example data +You should be familiar with data querying in Druid. If you haven't already, go through the [Query data](../tutorials/tutorial-query.md) tutorial first. -For this tutorial, we'll use a small sample of network flow event data, representing packet and byte counts for traffic from a source to a destination IP address that occurred within a particular second. + +## Load the example data + +For this tutorial, you use a small sample of network flow event data, representing IP traffic. Review Comment: removed the comma -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For additional commands, e-mail: commits-h...@druid.apache.org
