CMS
CMS allows you to set your Synology NAS/NVR as a host server while adding multiple Synology servers as recording servers to form a larger surveillance network. Enable centralized management system (CMS) in Application Center > CMS to add or update recording servers, and manage cameras installed on such servers. Refer to this article to select suitable host server models based on the number of recording servers and cameras you need to manage.
Moreover, you can add multiple Synology servers as failover servers to maximize the uptime of surveillance services. When a recording server goes out of service, the failover will assume the surveillance service. Once the recording server resumes working, you can determine how to fail back the services during the failover status. For more information, see the following sections below or download the white paper.