What causes "balancing pool" messages ?

Nomad atxnomad at gmail.com
Thu Jan 10 20:25:05 UTC 2008

On 1/10/08, David W. Hankins <David_Hankins at isc.org> wrote:
> On Thu, Jan 10, 2008 at 11:54:29AM -0800, David W. Hankins wrote:
> > > I have 2897 pool that get balanced every time I reload the dhcp server
> > > and every hour.
> Although honestly if you have that many pools, it would actually work
> out better if all the pools rebalance events were done individually
> and scheduled separately with some random dispersion.  3,000 pools to
> check is a significant amount of time to spend churning CPU and not
> answering queries.
> The troubles with that in the 3.1.x and 4.0.x sources is that our
> event (timed) scheduler does not cope well with large numbers of
> pending events, and the failover protocol message POOLREQ (which is
> used by one peer to politely ask the remote peer to cough up some
> leases) doesn't have a means to identify which pool they want to
> make a request for...you have to search them all.  So it makes for
> some challenges in keeping shared code.
> Some day.  Maybe they could even be balanced by different processors
> in that ethereal future everyone keeps talking about.
> --
> Ash bugud-gul durbatuluk agh burzum-ishi krimpatul.
> Why settle for the lesser evil?  https://secure.isc.org/store/t-shirt/
> --
> David W. Hankins        "If you don't do it right the first time,
> Software Engineer                    you'll just have to do it again."
> Internet Systems Consortium, Inc.               -- Jack T. Hankins

Am I misuderstanding something ... are you saying that while the servers are
balancing pools, they're not responding to DHCP requests?
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