How the buffer pool works

(1) solved parallel work;

(2) Is there a conflict between high-speed CPU and low-speed storage? (3) Existing UNIX data is stored in the buffer zone; the next time it is used, it is searched in the buffer zone; I/O system software (1) in order to improve the adaptability and scalability of the operating system, currently, almost all operating systems implement device independence (Device
Independence) is also known as device independence; (2) User ProgramDevice independence: the user program does not directly use the physical device name (or the physical address of the device), but can only use the logical device name, converts a logical device name to a specific physical device name and performs I/O operations;