This document discusses using multiple datastores for different types of data and workloads. It describes characteristics of hot, warm and cold data and provides examples of Amazon AWS services suited for each type. These include DynamoDB, ElastiCache and Aurora for hot data, Elasticsearch and Redshift for warm data, and S3, Glacier and Athena for cold data. The document emphasizes matching the appropriate datastore to data based on factors like latency, volume, request rates and durability.