A customer wants 24×7 availability for a business application that uses a file system. Which
operation ensures a consistent replica of the file system?
A.
Unmount the file system prior to the creation of the replica
B.
Stop the application prior to the creation of the replica
C.
Flush the file system buffers after creation of the replica
D.
Flush the file system buffers before creation of the replica
File systems buffer the data in the host memory to improve the application response time. The buffered data is periodically written to the disk. In UNIX operating systems, sync daemon is the process that flushes the buffers to the disk at set intervals. In some cases, the replica is created between the set intervals, which might result in the creation of an inconsistent replica. **Therefore, host memory buffers must be flushed to ensure data consistency on the replica, prior to its creation**
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