I have a few questions re: using Backup Exec 2010 with the VMWare agent. Environment is a new VMWare environment with three ESX hosts that will be hositing 11 - 12 vm's, connected to an iSCSI SAN. I am considering using BE2010 with the VMWare agent to back up the vm's to a quantum LTO 4 tape drive hosted on another physical server. My question is in regard to how much space the vm's use on the tape when backed up. For example, let's say I have four vm's, each with 50 GB provisioned for use by the virtual disk (configured as thick \ zeroedthick, which I believe is the default). On each of those vm's let's say there is 20 GB of actual data. Therefore, the configured size of the four vm virtual disks is 200 GB, but there is only 80 GB of actual data. If I back up all four of these vm's with BE2010, how much space is actually used on the tape drive, 200 GB, or 80 GB? If it is 200 GB, then can I reduce it to 80 GB by implementing thin provisioning? If so, I have read it is best to implement that at the SAN level as opposed to within VMWare, is this accurate?
Thanks very much