Content Addressed Storage
Content Addressed Storage (CAS) is a data storage architecture where data is identified and retrieved based on its content, typically using a cryptographic hash of the data itself as the address. This ensures that identical content always maps to the same unique identifier, enabling deduplication, integrity verification, and immutable storage. It is commonly used in systems like version control (e.g., Git), distributed file systems, and blockchain technologies.
Developers should learn CAS when building systems that require data integrity, deduplication, or immutable storage, such as in version control systems, backup solutions, or decentralized applications. It is particularly useful in distributed environments where data consistency and efficient storage are critical, as it prevents duplicate data and ensures that content can be reliably verified without relying on file names or paths.