- 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)