[Python-Dev] Re: RELEASED Python 2.3.1

[Tim Peters]

[Martin v. Löwis]
> As Guido explains, fsync is not necessary for that kind of application
> on a POSIX system. Once write(2) has completed, all other processes
> immediately see the changed data.

But we're not calling write(2) -- Python's file.write() (which my little
driver used, and also what ZODB uses) calls the buffered fwrite.

Ignoring that, some systems aren't "pure".  I note that, on my Windows box,
some Cygwin utilties "see" the hoped-for file sizes while running my driver
without the fsync under Cygwin Python, but Windows utilities don't.  I was
using Cygwin 2.2.2; I don't know whether 2.3.1 under Cygwin thinks fsync has
gone missing.