Hi Dan, On 11/20/24 6:18 PM, Dan Shelton wrote: > Hello! > > What will a NFSD server side COPY do with sparse files? Are holes preserved? The Linux NFSD implementation uses the copy_file_range syscall to do the copy, which could potentially result in holes getting expanded (note that this is true for local filesystems calling copy_file_range as well). I'm sure something could be rigged up on the server side using SEEK_HOLE / SEEK_DATA to call copy in a loop (as suggested by the "Notes" section of the man page) to preserve holes, but that's not how the current implementation works. I hope this helps! Anna > > Dan
