Explain the checkpoint mechanism's purpose. How often should checkpoints be carried out? What effect does the number of checkpoints have on: What is the system's performance when there isn't a...

Explain the checkpoint mechanism's purpose. How often should checkpoints be carried out? What effect does the number of checkpoints have on:

• What is the system's performance when there isn't a failure?


• How long does it take to recover from a system failure?


• How long does it take for a media (disc) failure to be repaired?