Additonal database services

• Amazon DocumentDB : is a document database service that supports MongoDB workloads (MongoDB is a document database program)
• Amazon Neptune : is a graph database service. Amazon Neptune can be used to build and run applications that work with highly connected datasets, such as recommendation engines, fraud detection, and knowledge graphs
• Amazon Quantum Ledger Database (Amazon QLDB) : is a ledger database service. Amazon QLDB can be used to review a complete history of all the changes that have been made to client’s application data
• Amazon Managed Blockchain : is a service that can be used to create and manage blockchain networks with open-source frameworks. Blockchain is a distributed ledger system that lets multiple parties run transactions and share data without a central authority
• Amazon ElastiCache : is a service that adds caching layers on top of databases to help improve the read times of common requests. It supports two types of data stores : Redis and Memcached
• Amazon DynamoDB Accelerator : is an in-memory cache for DynamoDB. It helps to improve response times from single-digit milliseconds to microseconds