Differential incremental backs up more data than full
Hi! I have an environment with NetBackup server 7.7.2 on SLES 12 SP1 and about 35 clients. All clients are VMs running on VMware 6.0 and there are different OS running on them but most are Windows Server. There are also SLES 11, Oracle Linux 6.4 and some others. There are two main policies: one of them stores the backups in a disk unit (in the NetBackup server) to make staging to tape later, and the other one stores directly in tape (TS3100). Both policies are VMware type and the VMs backed up by one are not backed up by the other policy. So here comes the problem (idk if it's really a problem but I want to understand if it's not): The differential incremental backups always bring more or slightly lessdata than full backups. It doesn't make much sense to me because I think differential incremental backup should only transfer the changed files (blocks if we talk about the .vmdk, right?), and there are two VMs (Windows, one in disk and one in tape policy) that makes differential incremental correctly, as you can see in the screenshot. So I want to know if this is a normal behaviour for VMware policies, a bug, bad config or something. Regards.Solved1.7KViews0likes5Comments