In the Huawei storage system, which of the following statements about rolling back HyperCDP are correct ()

The phone is accessing the LINUX client of the Oceanstor 9000 cluster, which can appropriately reduce the number of concurrent NFS on the client.
To improve access performance

A company purchased a set of Huawei distributed storage, and used QoS flow control technology to control user I/O when deploying block services.
Control, which mechanism can be used to manage the I/O queue ()

(multiple choice) The daily inspection performance indicators of the big data storage system include:

The data capacity of site A is 2000GB. The data capacity of site B is 3000GB. The data of site B is remotely replicated.
If it is saved to site A, the back-end storage capacity required by site A is (the re-deletion ratio is 3):