[Python-Dev] Re: RELEASED Python 2.3.1

["Martin v. Löwis"]

Tim Peters wrote:

> At least on Windows, both the flush and the fsync are necessary to see one
> million bytes (via a different process) at the first prompt, two million at
> the second, and so on.  With neither, another process typically sees 0 bytes
> before the file gets huge.  With just one of them, it seems hard to predict,
> ranging from 0 to "almost" a million additional bytes per prompt.

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.

Regards,
Martin