SMB Direct – SMB3 over RDMA
docs.kernel.org
docs.kernel.org
But with Apple's recent introduction of RDMA over Thunderbolt, that got my hopes up I could use it for storage, not only moving LLMs, but also for video file storage, where editing from one Mac to another (or over Ethernet, if that's supported) could be much faster, with lower latency.
[0] https://www.usenix.org/conference/nsdi22/presentation/reda
I heard that it was perhaps recently fixed, but copying many small files was multiple times faster to do via something like Total Commander vs the built in File Explorer (large files goes equally fast).
People seeing how slow Explorer was to copy would probably presume that it was a lower level Windows issue if they had a predisposed bias against Microsoft/Windows.
My theory about Explorers sluggishness is that they added visual feedback to the copying process at some point, and for whatever reason that visual feedback is synchronous/slow (perhaps capped at the framerate, thus 60 files a second), whilst TC does updating in the background and just renderers status periodically whilst the copying thread(s) can run at full speed of what the OS is capable of under the hood.
[1] Finder has parts that show continued use of code written for MacOS 9 :V
A big, increasing over last decade, chunk of that is fear that they will break the compatibility - or otherwise drop in shared knowledge. To the point that the more critical parts the less anyone wants to touch them (heard that ntfs.sys is essentially untouchable these days, for example).
And various rules that used to be sacrosanct are no longer followed, like the "main" branch of Windows source repository having to always build cleanly every night (fun thing - Microsoft is one of the origins of nightly builds as a practice)
Less people are trusted to touch ntfs.sys due to lack of experience, thus they never gain it and that in turn means less work and in turn means even less people have proved themselves trustworthy enough to work on it.
Until nobody remains in the company that is trusted enough.
I could see that or other safety checks making one program slower than another that doesn’t bother. Or that sort of thing being an opportunity for a poor implementation that slows everything down a bunch.
Microsoft gives them a lot of ammo. While, as I said, Microsoft et al. have seen that SMB is indeed efficient, at the same time security has been neglected to the point of being farcical. You can see this in headlines as recent as last week: Microsoft is only now, in 2025, deprecating RC4 authentication, and this includes SMB.
So while one might leverage SMB for high throughput file service, it has always been the case that you can't take any exposure for granted: if it's not locked down by network policies and you don't regularly ensure all the knobs and switches are tweaked just so, it's an open wound, vulnerable to anything that can touch an endpoint or sniff a packet.
MS would bend backwards to make sure those enterprise Windows 0.24 boxes will still be able to connect to networks because those run some 16bit drivers for CNC machines.
Meanwhile Google decided to kill a product the second whoever introduced it on stage walked off it.
Azure is a money-maked for MS, and wouldn't be so without those weird legacy enterprise deployments. The big question is if continuing to increase a posture about about security together with an "cloud" focus is actually in their best interest or if retaining those legacy enterprises would have been smarter.