Which of the following statements is correct about the multi-NameNode feature of Huawei's distributed storage products?

Which of the following statements is correct about the multi-NameNode feature of Huawei’s distributed storage products?

Which of the following statements is correct about the multi-NameNode feature of Huawei’s distributed storage products?
A . Only one Active NameNode provides metadata services
B . NameNode is the metadata request processing node of HDFS
C . NameNode switching will cause metadata service interruption
D . NameNode is the data read processing node of HDFS

Answer: B