Company A purchased a batch of TaiShan servers to expand the existing distributed storage Ceph. Which of the following are the main steps to install and deploy the file storage service? (Multiple choice)

Company A purchased a batch of TaiShan servers to expand the existing distributed storage Ceph. Which of the following are the main steps to install and deploy the file storage service? (Multiple choice)
A . Create a storage pool
B . The client mounts the file system
C . Configure the mds node
D . Create a file system

Answer: ABCD