we are not aware of any database management system that could make use ofallheterogeneous resources at once in parallel for boosting its query processing performance. A novel software architecture would be needed. However, for the designers of system software this...
多元程式規劃系統(Multiprogramming)的主要目的,是隨時有一個行程在執行,藉以提高CPU的使用率。分時系統(Time Sharing)的目的是將CPU在不同行程之間不斷地轉換,以便讓使用者可以在自己的行程執行時與它交談。為了達到這個目的,行程排班程式(Scheduler)為CPU上執行程式選擇一個可用的行程(可能由一組可用行程)。單一處理器...
OS provides each user with a unique address space and maintains the distinction between the programs and data belonging to each address space. Within each address space, the user can start multiple tasks, using task control blocks (TCBs) that allow multiprogramming. ...