FailOver Brochure
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Failover Guidelines
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Failover model

For high security and mission-critical applications where downtime of recording servers is not an option, CathexisVision offers the option of failover of recording servers. This gives the customer peace of mind knowing that data loss is no longer an issue with an automated system already in-place to assimilate the role of a failed recording server.

Cathexis uses a hot-spare model for failover. In this model, failover servers monitor recording servers. When a recording server is down one of the failover servers assumes the functions of the failed recording server.

In failover mode, the failover server operates exactly like the failed recording server and the site continues to function as if the recording server had not failed. The video is buffered on the failover server and re-inserted into the original recording server’s database when it restarts.

It is possible to have multiple failover servers monitoring a site. The more failover servers the less risk of downtime.

The NVR software can be installed on both Windows and Linux systems

Site in normal conguration with Hot-spare Server available to assume function of a Recording Server. Note that there are different IP addresses for the Recording and Hot-spare servers.

Site in Failover conguration with the Hot-spare Server now assumed the function of the failed Recording Server (Slave 2) The Hot-spare Server could assumed either of the Recording Servers functions.


From CathexisVision 2018, a failover base license is included automatically in any Premium site purchased.
In CathexisVision 2018 Professional sites, a failover base license (CFOR-2001) is required. A failover
camera license (CFOR-1001) is required for each camera on the Professional and Premium sites. These
licenses need to be purchased in addition to the Professional and Premium software license.

CathexisVision 2016 and 2017 Professional/Premium sites need to purchase the failover camera licenses
in addition to their existing licenses (as for the CathexisVision 2018 Professional/Premium sites). All
cameras on site must have CFOR-1001 camera failover licenses and not just sufficient for a single failover


  • NetBSD servers cannot be failed over
  • If the master NVR is failed over the IP address will change for external connectivity purposes.
  • Servers with frame-grabber cards cannot be failed over