1Z0-902 Exam Dumps | Which two statements are true about enabling write-back flash cache?

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Question 10/34

Which two statements are true about enabling write-back flash cache?

A. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.

B. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.

C. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.

D. Before write-back flash cache is enabled, you need to drop the Flash Cache first.

E. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.

Correct Answer: A,D

According to the Oracle documentation1, two statements that are true about enabling write-back flash cache are:
Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations (A). This is because write-back flash cache provides better performance and reliability for data file writes than write-through flash cache.
Before write-back flash cache is enabled, you need to drop the Flash Cache first (D). This is because changing the flash cache mode requires recreating the flash cache with a different configuration.

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