[Haskell-cafe] How to move files?

[☂Josh Chia (謝任中)]

That would work but may not be the most efficient in all cases. On many
systems, /tmp is a tmpfs, which being memory-backed is more efficient than
a file on a physical disk or network, so writing to /tmp has performance
advantages.

On Thu, Apr 15, 2021 at 4:23 PM Daniel Trstenjak <daniel.trstenjak at gmail.com>
wrote:

> Hi Josh,
>
> the fastest and safest way is to create the temporary file in the
> directory of the final location and then move the file to its final name.
>
> This way you ensure that the temporary file is always on the same device
> or partition as the final file and therefore a move is always possible.
>
> And it's the safest, because a move is an atomic operation - which copy
> isn't - and therefore other processes will never see a partially updated
> file.
>
> Greetings,
> Daniel
>
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