On Fri, 16 Feb 2007, Frank M. Ramaekers wrote:
Sure I understand that, but If I wanted it to be within 15 seconds response, I'd have to check 4times x 60 seconds x 60 minutes x 24 hours per day. Kind of a waste for a file that may or may not be transmitted each day.
push v pull, poll v select -- SGI formerly had 'fam' and the fam daemon to make this more economical, and we shipped it in centos-2
http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=bks&...
and
http://oss.sgi.com/projects/fam/
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If one wanted to enqueue events without polling, use a tail -f on the xferlog, and | grep the desired events, feeding those to an enqueuer, or just fire off a child as each new item is completed -- Such a script can live in the /etc/inittab quite happily, and Linux will handle the scheduling for you.
-- Russ Herrold