State the purpose of the checkpoint mechanism. How often should checkpoints be performed? How does the frequency of checkpoints affect.
a. System performance when no failure occurs
b. The time it takes to recover from a system crash
c. The time it takes to recover from a disk crash
Answers
Answer:
The checkpoint is a type of mechanism where all the previous logs are removed from the system and permanently stored in the storage disk. When it reaches to the checkpoint, then the transaction will be updated into the database, and till that point, the entire log file will be removed from the file
Answer:
- Speaking of how frequently the check point should be performed, it is suggested that checkpoints be performed as frequently as possible because the more frequently checkpoints are performed, the less likely it is that outdated data will be updated.
- A check point mechanism is a system, point, or mechanism within the database management system that enables data, information, transactions, and general logs passed through the system to be retrieved and stored into a separate storage system.
a) When success occurs, the checkpoint mechanism has simply succeeded in accumulating needless costs for carrying out the process that would have been required at this time.
b) It's crucial to remember that the primary goal of a check point method is to allow us to restore database data prior to a moment at which the database became damaged. The time it takes to recover from a system crash will be significantly reduced if we run the check point mechanism procedure continuously since we will have identified outdated data and updated the system before the crash.
c) This may also have something to do with the system crash's recovery taking place at the same moment. We can also use the answer for how long it takes for a system to recover from a disc crash. The fact that it pertains to a disc is the only distinction.
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