Quoting from the Avamar official announcement:
Avamar Technologies, Inc. a leading provider of enterprise data protection software, today announced support for VMware, eliminating customer challenges around quickly and efficiently backing up and recovering critical data from VMware virtual machines.
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Avamar identifies redundant sub-file data segments within and across multiple virtual machines, host servers, and sites. Using patented data de-duplication and global single instance storage (SIS) technology, Avamar ensures that backup data segments are stored only once on a global basis. This effectively reduces the amount of data moved and stored by up to 300x, while providing daily full backups and rapid restores across existing LAN/WAN links…