The plugin of type org.exoplatform.services.organization.OrganizationDatabaseInitializer is used to specify the list of membership types/groups/users to be created.

The checkDatabaseAlgorithm initialization parameter determines how the database update is performed.

If its value is set to entry, it means that each user, group and membership listed in the configuration is checked each time GateIn 3.2 is started. If the entry does not exist in the database yet, it is created. If the checkDatabaseAlgorithm parameter value is set to empty, the configuration data will be updated to the database only if the database is empty.