In Avaya IXTM Messaging High Availability, which server conducts the Database Management operation?

In Avaya IXTM Messaging High Availability, which server conducts the Database Management operation?

A. Consolidated Server

B. Mobilink Server
C. Web or TSE Server
D. Primary Server

Reference: http://www.esna.com/services/education/IX_Messaging_10_8/SIG/RH5_IXM_SIG/IXM_Server_Install_Guide_HA/IXM_Server_Install_Guide_HA.htm