Polyinstantiation is a computing technique where multiple instances of a shared resource are created to prevent a single user or process from contaminating the data required by others. In an operating system, it creates multiple instances of virtual memory or a temporary directory to maintain system security when the resource accessed by multiple users. Polyinstantiation is used in relational database management systems. A single relation may be mapped to multiple instances of a row of data to assist users with different security levels.
Database, Security terms
