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Re:FUSE performance improvements with eBPF [pdf] by Palomides on Thursday July 11, 2019 @06:58PM (#20416670)
on linux, something like intel's SPDK will let you do everything, very quickly, in userspace
Re:FUSE performance improvements with eBPF [pdf] by monocasa on Thursday July 11, 2019 @07:49PM (#20416946)
Which doesn't quite have the same semantics, as you can't multiplex the disk easily. Your one app totally owns the device.