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Re: FSFS propaganda

From: Greg Hudson <ghudson_at_MIT.EDU>
Date: 2004-04-30 21:01:07 CEST

On Fri, 2004-04-30 at 14:55, Philip Martin wrote:
> Another point to discuss would be a machine crash. When a process
> writes a file it generally writes it to the OS cache, and the OS
> itself is responsible for flushing the cache to disk. A process can
> use fsync(2) to force a flush, but if it doesn't explicitly flush and
> the machine crashes shortly after the commit completes then data may
> be lost.

This is a known loose end. I would like to add code to fsync the rev
and prop files before returning from the commit, but APR does not have
an interface to fsync(), nor could I find a Unix-specific interface to
get the fd so that I could put a call to fsync() inside #ifndef WIN32.
I haven't thought of a way to circumvent this problem yet, but hopefully
there's an option.

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Received on Fri Apr 30 21:01:29 2004

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