We currently have a relatively virtual large file server, hosting around 20TB of unstructured file data (Windows 2012 R2). The disks are physical RDM, but providing that I convert them to virtual RDM I'd like to know how the CBT & Veeam would improve my backups. Currently it backs up over 1Gb NIC to tape (
) and this of course (with millions of tiny files) takes days!
If we adopted Veeam, and took advantage of VMware CBT, how much of an improvement could I realistically expect to gain in backup times compared to tapes. Tapes obviously have to troll through the entire data set even if only 10GB of the 20TB has changed since the last backup. Would Veeam still have to process the 20TB of data, or would it actually be able to connect-in and immediately backup the 10GB changed blocks only? And would this result in a backup time of minutes/hours as opposed to days?
Thanks for any input.