often should checkpoints be performed? How does the frequency of checkpoints affect: System performance when no failure occurs? • The time it takes to recover from a system crash? • The time it takes to recover from a media (disk)

often should checkpoints be performed? How does the frequency of checkpoints affect: System performance when no failure occurs? • The time it takes to recover from a system crash? • The time it takes to recover from a media (disk)

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.10: Exponential Queues In Series And Open Queuing Networks

Problem 11P

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Question

Explain the purpose of the checkpoint mechanism. How
often should checkpoints be performed? How does the
frequency of checkpoints affect:
• System performance when no failure occurs?
• The time it takes to recover from a system crash?
• The time it takes to recover from a media (disk)
failure?

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Explain what the checkpoint mechanism is for. How often should checkpoints be made? How does the number of checkpoints change: • How does the system work when there are no problems? After a system crash, how long does it take to get things back to how they were? How long does it take to get back to work after a media (disk) failure?
Explain what the checkpoint mechanism is for. How often should checkpoints be made? How does the number of checkpoints change:• How does the system work when there are no problems?After a system crash, how long does it take to get things back to how they were?• How long does it take to get back to work after a media (disk) failure?
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