Which of the following statements regarding the Huawei Oceanstor V3 hierarchical storage and Smart Cache is correct?
A . A client business IO load random read that accounts for more than 60% using SATA, SAS for staging storage, use SSD to do cache, so it will effectively reducecosts and improve random performance indicators
B . If hot spot data is scattered and changing rapidly, it is recommended to use tiered storage
C . If there are many SSDs and hotspots, Smart Cache is the best choice
D . If you have a small amount of SSD data, use a tiered storage disk for more utilization
Answer: A