This article mention what are the Spectrum processes that have to be shutdown prior to manually backing up the SpectroSERVER and Archive Manager databases.
Release : Any version of Spectrum
For the SpectroSERVER database, ensure the SpectroSERVER process is shutdown prior to running a manual backup of the database.
For the Archive Manager (DDM) database. ensure the Archive Manager process is shutdown prior to running a manual backup of the database.
Reference: https://techdocs.broadcom.com/us/en/ca-enterprise-software/it-operations-management/spectrum/10-4-2/administrating/database-management/ddm-database-maintenance/database-restoration/ddm-load.html