Amazon Quantum Ledger Database - QLDB

• Part of AWS Blockchain part of products
• It as an immutable append-only ledger-only database
• It provides a cryptographically verifiable transaction log
• It is transparent: full history is always accessible
• It is a serverless product, it provides Ledgers and Tables. We have no servers to manage
• It is resilient through 3 AZs, replicates data within each of those AZs
• It can stream data to Amazon Kinesis, it can stream any changes to data into Kinesis in real-time
• It is a document database model, storing JSON documents (key-value pairs with a nested structure)
• Provides ACID transactions
• Use cases for QLDB:
  • Anything related to finance: account balances and transactions
  • Medical application: full history of data changes matters
  • Logistics: track movement of objects
  • Legal: track the usage and change of data (custody)