It is easier to manage backups for a relatively small number of host servers than it is to manage backups for each individual virtual machine. The first of these reasons is that many organizations have large numbers of virtual machines. There are several different reasons why host-level backups are the preferred backup type, but there are three reasons that tend to be more important than the others. Although this approach can work in a VMware environment, it is almost always better to protect virtual machines at the host level (the hypervisor level), rather than at the guest (virtual machine) level. In physical datacenters, backups are commonly enabled by installing a backup agent onto each physical server. Although virtual servers are designed to mimic physical servers, the process of backing up a VMware virtual server differs considerably.
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