As a result, when running the next incremental backup of the VM, only changed blocks are copied to backup storage. Resilient Change Tracking (RCT) is a feature of Microsoft Hyper-V that tracks disk blocks that have changed since the last backup of a virtual machine (VM).
Let’s take a look at this technology in Windows Server 2016 and learn how it is implemented. Microsoft calls its own technology Resilient Change Tracking (RCT). A similar feature is available for Microsoft Hyper-V environments. VMware’s Changed Block Tracking (CBT) has been available for a long time and is familiar to many when it comes to creating backups in virtual environments. When it comes to backup efficiency and copying only unique data blocks between full backups (that is, creating incremental backups), change tracking technology is extremely important.
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