Which of the Following Statements About the Oceanstor V3 File

Which of the following statements about the Oceanstor V3 file system deduplication features are correct? (multiple choice)

A) can only be opened when creating a file object, business can not be opened or closed during data deduplication and compression function
B) Using online processing to deduplicate data before it is written to disk
C) When both deduplication and compression are turned on, the data will be deduplicated and then compressed
D) Use smart cache can accelerate the search performance of fingerprints deleted