On Wed, Oct 30, 2013 at 7:57 AM, John Arbash Meinel <j...@arbash-meinel.com> wrote: >> Where is N^2 coming from? > > If you add N units one-by-one each new add triggers all existing units > to wake up and ask for the Life and CharmURL of the service again. So > first unit asks, 2nd unit asks and causes the first unit to ask again.
Why does it cause the first unit to ask again? Adding a unit should not trigger watchers on the service to wake up. There are explicit watches for being notified about new units. > In theory it is gated at a 5-sec delay between add unit and triggering > requests. In practice it took 3+s for add-unit to complete, so it was > pretty much 1-add => 1-trigger. > > The log I have for bringing up 1000 nodes has the result of the > CharmURL 2,183,716 times. There are other triggers for this, but > 1000*1000 = 1M. That's definitely broken, and it's a great finding. gustavo @ http://niemeyer.net -- Juju-dev mailing list Juju-dev@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/juju-dev
