On 3/4/25 05:34, Philipp Marek via openssh-unix-dev wrote:
Does OpenSSH scp/sftp mode transfer sparse files correctly, i.e. are
holes skipped and not transferred as chunks of 0 bytes? [1]
We're asking about sparse files in the >= 1PB range, which consists of
multi-TB holes with around 600-2000GB of valid data.
Perhaps rsync would be a good fit here,
it supports --sparse.
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I think one of the issues you are going to face is that SEEK_DATA and
SEEK_HOLE don't seem to be currently supported under OpenBSD. Since
that's the home OS for OpenSSH this could create portability issues.
While you can get around that with the judicious use of defines it means
that the feature set will start to shift between different OSes.
Personally I think it's a good idea and I may explore it for HPN-SSH but
I think it's going to be a hard sell for the OpenBSD community.
Chris
p.s. sorry for not replying correctly. My mail seems to be having issues
and this is the only email in the thread I've seen.
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