Discussion
In virtual cluster management "templates" can be implemented using :
Answer: D
Templates are implemented using the COW (copy on write) format.
In virtual cluster management (as described by Hwang, Fox and Dongarra), a template virtual machine image is shared, and new virtual machines are created from it using copy-on-write disks: each VM writes its changes to its own small layer while reading unchanged blocks from the template, which makes deployment fast and saves storage.
'Skip and relay' and 'copy and relay' are not image formats, and NOW (network of workstations) is a kind of cluster, not a way of implementing templates.
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