What is a key characteristic of QLDB?

A key characteristic of Amazon Quantum Ledger Database (QLDB) is that it features a serverless and immutable transaction log. This means that every change made to the database is recorded as a transaction in a log that cannot be altered or deleted, providing a reliable and trustworthy audit trail. This immutability is crucial for use cases that require a verifiable history of transactions, such as financial records or supply chain tracking.

The serverless aspect allows users to interact with QLDB without needing to provision or manage the underlying infrastructure, as Amazon handles that automatically. This reduces operational overhead for developers, allowing them to focus more on building applications rather than managing database servers.

Other characteristics of QLDB include its ability to support high-performance querying and provide a flexible model for application development, but the combination of being serverless and having an immutable transaction log distinctly defines QLDB's unique position in the AWS database offerings.