Dell VNX5800 VNX Series: Introduction to SMB 3.0 Support - Page 21

It is important to note that there is a performance impact associated with enabling encryption. Data is encrypted at either the client or VNX before it is sent across the network and decrypted at the destination as it is received. CPU resources are required on both client and VNX for these operations. Remote Volume Shadow Copy Service Volume Shadow Copy Service (VSS) infrastructure enables file systems to be backed up while applications continue to write to these volumes and enables creation of snapshots (called shadow copies for Microsoft VSS). Prior to SMB 3.0, VSS could only create and manage snapshots of data stored on local volumes. With Windows Server 2012, Microsoft has extended this feature with Remote Volume Shadow Copy Service (RVSS). RVSS supports application backup across multiple file servers and shares. Backup applications that are VSS-aware can now perform snapshots of server applications that store data on the VNX CIFS shares. Hyper-V has the ability to store virtual machine files on CIFS shares. RVSS can be leveraged to take point-in time copies of the contents of the share. The application can create a writeable snap to leverage RVSS and then perform a resynchronize operation before the backup is started. Figure 14 shows a simple deployment of a single Hyper-V server utilizing VNX to store virtual machines and user data. EMC VNX Series: Introduction to SMB 3.0 Support 21