Having your Koha Library System installed in multi-tier back end architecture secure the web access, and able to optimize user experiences without any damage or hacking incident is crucial nowadays. Users tend to demand full scale of facility to cater their browsing experiences and searching within the OPAC in a safer mode.
Even on Database also can consider to have the backup service for Recovery Time Objective (RTO) in 8 hours, and the Recovery Point Objective (RPO) is less than 5 minutes. This is on the DB Master and Slave architecture.
Further info on this service can refer to https://youtu.be/2X0flT_GZZ0.