Is nbdcopy actually touching the data consumer side or is splicing to /dev/null ... | Hacker News

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		gpderetta 48 days ago \| parent \| context \| favorite \| on: How to use Linux vsock for fast VM communication Is nbdcopy actually touching the data consumer side or is splicing to /dev/null ?

rwmj 48 days ago [–]

It's actually copying the data. Splicing wouldn't be possible (maybe?), since NBD is a client/server protocol.

The difference between nbdcopy ... /dev/null and nbdcopy ... null: is that in the second case we avoid writing the data anywhere and just throw it away inside nbdcopy.

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