Search Again: Re: effects of real low TTL ???? From: Len Conrad Date: Wednesday, November 7, 2001 Time: 6:16:55 pm >Now there will be lots of other people visiting the site from other ISPs, >so there will be /some/ load balancing going on. load distribution >What I'm thinking is that if I set the TTL of the domain real low... specifically, the www.shreksite.com A record >say one hour; if your DNS and pipes are ready, you can make it lower, to get more time granularity. > and if the ISP respects the TTL and flushes its cache after that hour; > then the next visitor from that ISP will force a new query and we'll have > a 50/50 chance of it being the other server this time around. And so on > and so on until the traffic dies down. > >Clearly there is some disadvantage to expiring an otherwise valid zone >information just to force re-lookups... but are there other consequences >that I'm not seeing? Your DNS will get hammered more vs TTL of 86400, but one query from each caching DNS every 15 or 5 minutes is probably immeasurably more traffic. Note that records of broken zones never get cached at all. Len ___________________________________________________________________ Men & Mice: QuickDNS - DNS Expert - DNS Training - DNS Consulting DNS Classes: Toronto 10/18-19, Fairfax VA 10/35-26, Frankfurt 11/21-23 London 11/26-28, Maidenhead 10/31-11/2 http://MenAndMice.com/DNS-training

Messages In This Thread: effects of real low TTL ???? by Joseph D''Andrea on Nov 7, 2001 at 5:57:10 pm Re: effects of real low TTL ???? by Len Conrad on Nov 7, 2001 at 6:16:55 pm Re: effects of real low TTL ???? by Men & Mice Support on Nov 7, 2001 at 10:06:42 pm