The Global Domain is one of the relational database domains in the Postgres database that stores the management configuration. The purpose of the Global Domain is to serve as the global database for Multi-Domain Security Management (MDSM) and contain the global objects and policies that are shared across all domains. The Global Domain also stores the global settings, such as the administrator roles, the LDAP servers, the IPS profiles, and the SmartEvent views. The Global Domain can be managed by the Global Domain Administrator or the Super User Administrator using the SmartConsole. The Global Domain can be backed up and restored using the mds_backup and mds_restore commands.
Reference:
1: Architecture and Processes - Check Point Software
2: Multi-Domain Security Management R81.10 Administration Guide
3: How to backup and restore Multi-Domain Security Management Server