Tableau Prep works with big data volumes and big data tools, such as Snowflake, Redshift, and Amazon EMR. You can refer to Chapter 10, Tableau for Big Data and connect existing accounts of Amazon Redshift, Amazon EMR, or Snowflake.
Tableau Prep allows us to work with big data sets by leveraging sampling. However, it processes data on your local machine and if you want to create, extract, or export data into a CSV using a huge dataset, it can fail due to lack of memory. We learned that Tableau Desktop works with big data by rendering results using a live connection. We don't want to create an extract when working with big data. In the case of Tableau Prep, we can learn our dataset and then use filters to split the dataset and work with part of it.