Microsoft releases GVFS (Gif Virtual File System)
"Microsoft open sourced the client code for GVFS (which still relies ona pre-release file system driver), so its use isn't recommended for production at this point. However, the Windows team is using GVFS to help deal with the Windows codebase across all of its many variants (Windows OneCore, desktop, IoT, HoloLens, Xbox, etc.), which consists of 3.5 million files and is over 270 GB in size."
News Article: Microsoft's One Engineering System brings Git Virtual File System to the masses | ZDNet
"While GVFS is still in progress, we’re excited to announce that we are open sourcing the client code at GitHub - Microsoft/GVFS: Git Virtual File System. Feel free to give it a try, but please be aware that it still relies on a pre-release file system driver. The driver binaries are also available for preview as a NuGet package, and your best bet is to play with GVFS in a VM and not in any production environment.
In addition to the GVFS sources, we’ve also made some changes to Git to allow it to work well on a GVFS-backed repo, and those sources are available at GitHub - Microsoft/git: A fork of Git containing Microsoft-specific patches.. And lastly, GVFS relies on a protocol extension that any service can implement; the protocol is available at GVFS/Protocol.md at master · Microsoft/GVFS · GitHub."
MSDN Blog: Announcing GVFS (Git Virtual File System)