What Is Meant By Time Sharing In Mainframe Systems?
In batch system, the user cannot interact with the job when it is being executed. It means that all possible problems must be anticipated before hand as the user cannot make corrections during execution. It becomes very difficult when a program has to go through many phases such as compilation, linking etc. It may be difficult to define what to do if a particular phase tails. Another problem is the debugging of a program. All debugging is static. The only information to find out is why the program is giving incorrect output at various stages of execution. Time sharing was introduced to make computer systems more interactive. CPU is the most important resource that is shared. Each job gets CPU for a small amount of time. When the allotted time period for a job is used, the next job in line is allocated CPU. The switching between jobs occurs very frequently. It allows the user to interact with, the job as it is running. Operating system should enable the user to interact with jobs that a
