I think I found the solution, but it makes me wonder if I am doing something wacky or if I found a bug in the Perl or Linux (most likely Linux) IO system....

If I use O_SYNC and O_APPEND on the sysopen with flock my problems seem to go away... but I need both, along with O_CREAT and O_WRONLY... seems very wrong, but so far my tests look good.

                - Ant
                - Some of my best work - (1 2 3)

In reply to Solution, it seems. by suaveant
in thread What the flock!? Concurrency issues in file writing. by suaveant

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