In the event of a failure of the on-site infrastructure, an off-site copy infrastructure will be started, and data can be accessed from the original site using a VPN. There are several ways to accomplish this. With the built-in replication of the Microsoft Hyper-V server, synchronization of up to 30 seconds can be set up, meaning that 30 seconds of data will be lost if the central server fails. The standard setting time is 15 minutes. The disadvantage of continuous synchronization is that in the event of a blackmail virus attack, the encrypted files are also synchronized to the backup server. This can be protected by hourly checkpoints on replica servers, but this can be up to 24 hours. If the encoding is noticed later, the replica cannot be used, the system must be restored from backup.
Many backup programs have the option to send the data to an external location after saving and activate it as a virtual machine in the virtualization environment there. In this case, the data loss time is the time between the previous successful backup and the disaster.
Our company currently only provides this type of service in a Microsoft Hyper-V environment under an individual contract.