Feature:

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 Volume snapshot enhancements for VMware

Background: 

We currently use OVA as the exchange format for templates and snapshots, OVA is good for data exchange, but not for provisioning, when we deploy OVA, we actually need to unpack it into VMX and VMDK files, on the backup side, when we do a full volume backup, we first get VMX and VMDK files and then package it into OVA. When packing/unpacking logic is running inside a VM with remote storage, it means double amount of data transfer (read/write) will happen through the network. It exponentially increases the time when volume becomes rather large.

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