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Number of attempts to lock the file, at 1 second intervals, before returning an error. If nonzero, LOCK_NB is added to flock Mode; if zero, a single locking attempt will be made, blocking until the lock is available.name of journaling file, or reference to a list of arguments for "open" in perlfunc. If specified as a simple file name, it will be be opened in ' will not find the record with key 123, unless the word '123' appears somewhere in the other fields.Perl is an interpreted language that's available on most web server packages.
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