About the FusionInsight HD cluster upgrade, which of the following description is correct? (Multiple Choice)

About the FusionInsight HD cluster upgrade, which of the following description is correct? (Multiple Choice)
A . Active/Standby OMS changeover can not be performed manually in the processing of upgrade
B . The root account password of all the hosts in the cluster should be consistent
C . Keep the network smooth to avoid upgrade abnormal caused by network problems
D . Can not do expansion in the observation period

View Answer

Answer: ABCD