[Thomas Anderson]
> I'm seeing changes to the ZODB getting lost on reboot. I think it's
> because there are no fsync() calls being issued by Zope or even by
> zopectl on stopping Zope but I can't be sure. I'm using
> /instance/bin/zopectl {start|stop} for controlling Zope.
> I added a "sync" command to my /etc/init.d/umountfs script (Debian
> Woody) and this seems to have fixed the problem. I know postgresql
> syncs to disk for every transaction by default, does Zope?

ZODB does, as you can see in your installation's FileStorage.py
FileStorage._finish method.

Which version of Python are you using?  If you're using one of the early 2.3
releases, that would explain it; from the NEWS file for Python 2.3.2:

    - A bug in the autoconf machinery meant that os.fsync was never

2.3.3 should be used now.

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