Le 2017-11-02 à 18:34, Mark Feit a écrit : > Aurélien PIERRE wrote: >> >> So… what do you think of having the heavy filters processed in >> Darktable through the servers of Amazon or anybody else instead of >> having to break the bank for a new (almost) disposable computer ? >> Possible or science-fiction ? How many of you don't have a 1MB/s or >> faster internet connection ? How difficult would it be to code ? >> > Possible? Sure. Practical? Not so much. Interesting thought, though. > > For starters, you'd have to send the image there and back. A > losslessly-compressed, 14-bit NEF from my Nikon D750 runs 29 MB > (bytes) and, to make the math easy, let's say you have a 29 Mb/s > (megabits) connection to the Internet. Sending that image in each > direction will take eight seconds out and eight seconds back, so even > if your slow computer takes, say, 15 seconds to run a filter, you're > already behind the curve on data transfer alone. The actual quantity > of the data DT would need to transfer would be a lot larger since it's > not dealing with the image in a compressed format internally. On top > of that, you don't just buy CPU from Amazon. They also charge you for > using their pipes to get data in and out (more for out, because they > want you to also pay them to store your data on their other > services). Faster compute is available but comes at a premium. During the editing process, from what I have understood, DT only process a preview image which size fits the screen dimensions, so you could send to Amazon the RAW just once, then send editing commands, then download only 1080 px gziped previews during the editing until you export the picture for good, and maybe schedule the exportation for when the cloud is less used, meaning at a lower price. Also the transfer is free and the temporary storage is 0.005 $/hour. > > Where Amazon shines for this sort of thing is in large parallel jobs > where you can spin up a bunch of machines that live long enough to do > the work and then shut them off. For DT to be practical, you'd have > to have a system at the ready to do the work or instantiate one each > time you start DT and tear it down when you exit. > > You can get a lot of compute on your desk for not much money if you > shop carefully, and being able to leverage the GPU(s) in your graphics > card helps, too. > > --Mar > > ___________________________________________________________________________ > > darktable developer mailing list > to unsubscribe send a mail to > darktable-dev+unsubscr...@lists.darktable.org >
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