[Python-Dev] Re: RELEASED Python 2.3.1 (original) (raw)

Tim Peters tim.one at comcast.net
Sun Sep 28 17:50:30 EDT 2003

[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.

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