Based on this, which of the following are correct?

Client1 needs to read file X from a Huawei OceanStor 900 and the node that responds to the read request is node A.

Based on this, which of the following are correct?

A. If the system has monitored the file X has been cached on Node B, the client client1 can read the file directly from Node B.

B. If the system monitors that node B has cached file X, then node A can read the file from node

C. After HUAWEI OceanStor 9000 processes the request for reading the file X from client1, the system reserves the message on bothnode A and node B.

D. If the system monitors that node A has cached file X, then node A only caches the data of file X and does not cache its verification data

Answer: B,D