What is Amazon Redshift?

Amazon Redshift is a petabyte-scale data warehouse hosted by Amazon Web Services (AWS). Unlike on-premise data warehouses, Amazon Redshift is a fully-managed service, which means users are relieved of the architectural and operational challenges that come with setting up and scaling a data warehouse.

Users scale their usage of Amazon Redshift in terms of clusters. Each cluster is a set of nodes: one leader node and one or more compute nodes, the exact number of which will depend on the size of data at hand, the number of queries that will be performed, and the desired level of query performance.