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Recovery for computer switchover in a real-time system

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In real-time systems which demand uninterrupted servicing of incoming messages, it is customary to employ duplexed central computers, so that one may take the place of the other when needed. Questions arise concerning: 1. The economic justification of the second computer. 2. Keeping the operating personnel constantly alert and prepared for sudden switchover. 3. Loss of information and reduction in service when such switch-over occurs.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

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IBM Systems Journal  (Volume:2 ,  Issue: 1 )