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Re: syncing a directory
Actually, we do have that: fsync_range(fd, FDISKSYNC, ...).
Oh, interesting things for me to learn here.
So, is there possibly a way to explicitly synchronise a whole
directory? I mean the data that, in the old days, you could just have
write()-ten to the "everything is a file" directory? I'm somewhat
unsure about the use of the term "metadata" here. I don't know
whether one would call the fact that /tmp contains an entry foo
metadata of /tmp/foo or simply part of the data of /tmp.
To be more specific: suppose you have created a bunch of files in
(maildir) tmp/, and fsync()ed each of them. Now you move all of them
to new/. Is there a better way of ensuring they will still show up in
new/ in case the machine crashes other than fsync()ing each file again?
I understand that fsync()ing the file not before, but only after the
move is not an option because that would make it possible for
incomplete files showing up in cur/.
Thanks for your answers.
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