ddbased

ddbased is a term that refers to a type of database architecture or design. It is often used to describe systems that heavily rely on disk-based storage for their primary data operations. This contrasts with in-memory databases, which store data primarily in RAM. Disk-based databases are characterized by their ability to handle large datasets that may exceed available system memory. Data is typically read from and written to persistent storage, such as hard disk drives or solid-state drives.

The performance of a ddbased system is significantly influenced by the speed of the underlying storage. While modern SSDs have greatly improved disk I/O speeds, they generally still lag behind RAM access times. Consequently, ddbased systems often employ sophisticated caching mechanisms and query optimization techniques to minimize the need for frequent disk reads. They are well-suited for applications where data volume is a primary concern and where occasional latency introduced by disk access is acceptable.

Examples of ddbased systems include traditional relational database management systems (RDBMS) like MySQL, PostgreSQL, and SQL Server, as well as many NoSQL databases. These systems are designed to ensure data durability and can accommodate datasets far larger than the main memory of the server. The trade-off for this large-scale storage capacity is often a more complex management overhead and potentially slower transaction processing compared to in-memory alternatives.