周志遠教授作業系統 第1B講 Syllabus&Ch0: Historical Prospective
Mainframe Systems
- Good reliability
- Good security
- Widely used in bank, hospitals
Batch Systems
- Memory被切成兩塊
- 人來決定Job執行的順序 (卡片順序)
缺點
- 一次只有一個JOB
- No interaction (time-sharing) between jobs and users
- CPU 利用率很低 (IO Speed: CPU Speed = 1: 1000)
References
[1] 11001周志遠教授作業系統｜第1B講 Syllabus&Ch0: Historical Prospective
[2] 11001周志遠教授作業系統｜第1C講 Syllabus&Ch0: Historical Prospective
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