System Failure Modes Failures unique to distributed systems: Failure of a site. Loss of massages Handled by network transmission control protocols such as TCP-IP Failure of a communication link Handled by network protocols,by routing messages via alternative links Network partition A network is said to be partitioned when it has been split into two or more subsystems that lack any connection between them -Note:a subsystem may consist of a single node Network partitioning and site failures are generally indistinguishable. Database System Concepts-6th Edition 19.19 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 19.19 ©Silberschatz, Korth and Sudarshan th Edition System Failure Modes Failures unique to distributed systems: Failure of a site. Loss of massages  Handled by network transmission control protocols such as TCP-IP Failure of a communication link  Handled by network protocols, by routing messages via alternative links Network partition  A network is said to be partitioned when it has been split into two or more subsystems that lack any connection between them – Note: a subsystem may consist of a single node Network partitioning and site failures are generally indistinguishable