With ReFS as a backup repository, things are different as Veeam is able to leverage APIs provided by Microsoft and only change pointers referencing to actual data, without moving any bits around. Today, when using NTFS repository and when Veeam creates a synthetic full backup, it has to copy bits around to create a new synthetic full backup file with incrementals merged into this. ReFS were released as version 3.0 as part of Windows Server 2016 and allow you to build-out files using storage pointers. Since then we have seen few gotchas (recently resolved by Microsoft with the latest March 2017 patches) and we'll talk about that as well and few guides on how exactly the ReFS volume shall be created and how Veeam's backup jobs shall be configured to take a full advantage for best performance. We wrote about Veeam and ReFS in detail in our post here – Veeam 9.5 and Microsoft ReFS – Win Win for a Virtualization Admins, but this was before the release of ReFS and before Veeam 9.5 release. This post will focus on Microsoft Resilient File System (ReFS) as Veeam's ReFS integration which allows not only time saving, but also space savings. Virtual infrastructure monitoring software review.

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