I need to back up ~0.5 TB of files (about 600,000 of them) from a Windows Server 2003 machine to a CentOS 6.4 machine across a 100MB network, and update them once a night.
The backup script would be hosted on CentOS. Will SlimFTPd server+standard CentOS ftp client, or Windows AD fileshare+Samba 4 client be faster for synchronizing the backup via rsync? I.e. once it's going, say there are about 15 GB of changes, which one will be faster at comparing the directory structure to mirror them?