Time-sharing(OS)

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Time-Sharing Operating System:

Time-Sharing Operating System Prepared by: Hadisah Nehzati Only for Education purpose

Content:

Content History Definition Comparison Advantages Disadvantages

History:

History Why this idea came out ? The concept was described by publicly in 1957 by Bom Bemer. The first project initiated by John Mc Carthy, in 1957 CTSS(1961-1973) has the claim to be the first TSS. CTSS was the first system enable users to work on their own program online. The first commercially successful TSOS was Darthmout time sharing operating system(1964-1999). First practical  time-sharing system supported up to 32 user at terminals.

Time-Sharing Operating System :

Time-Sharing Operating System A  time-sharing system ( Multi- Tasking) allows many users to share the computer resources simultaneously M ultiple jobs are executed by the CPU by switching between them A time slice (small portion of CPU shared time) is given to each user for their execution Each user served in a sequence , on scheduled bases It is called “Time Sharing”, as the CPU time is shared by different process

Comparison:

Comparison Multiprogramming To maximize utilization Time-Sharing To minimize CPU response time

Advantages:

Advantages Each user gets CPU time Provide advantages of quick response Reduce CPU idle time Multi-channel nature Exclusivity Interactivity

Disadvantages :

Disadvantages By increasing nodes the system will become slow Question of security and integrity of user programs and data Problem of data communication Since all output devices are centralized on a single PC ,there will be time delay from one user to another

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