workloads</a> from VMware to open source management platforms like
oVirt/RHV, OpenStack and KubeVirt. To do this we have to copy vast
amounts of data quickly, modifying it in flight.
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Nearly everything we have to copy is a virtual machine <b>disk
image</b>. There are techniques you can use to copy disk images very
efficiently:
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<ul>
<li> without copying zeroes or deleted data
<li> without making temporary copies