Amazon Quantum Ledger DB (QLDB)

A Ledger Database is a NoSQL DB that is immutable, transparent, and has a cryptographically verifiable transaction log that is owned by one authority. You cannot update a record in a ledger DB. Instead, an update adds a new record to the database.

QLDB is a fully managed ledger database that provides a transparent, immutable, and cryptgraphically verifiable transaction log.

Use cases

• It's used for cryptocurrencies, such as Bitcoin.

• Shipping companis use it to track items, boxes, shipping cntainers, deliveries, etc.

• Pharmaceutical companies use it to track creation and distribution of drugs and ensure no counterfeits are produced.

• Store Financial Transactions. Create a complete and accurate record of all financial transactions, such as credit and debit transactions.

• Reconcile Supply Chain Systems. Record the history of each transaction, and provide details of every batch manufactured, shipped, stored, and sold from facility to store.

• Maintain Claims History. Track a claim over its lifetime, and cryptographically verify data integrity to make the application resilient against data entry errors and manipulation.

• Centralize Digital Records. Implement a system-of-record application to create a complete, centralized record of employee details, such as payroll, bonus, and benefits.