I didn't realize the write to disk was immediate (is that new in 0.8, with
requested acks enabled?).
I do think the OS will indeed reserve space in advance for data not yet
flushed to disk. This seems to be true, at least, for xfs, which I have
more experience lately.
On Thu, Aug 15, 2013 at 11:30 AM, Jay Kreps <[EMAIL PROTECTED]> wrote: