Search Again: Re: Root server selection algorithm From: Sigurdur Ragnarsson Date: Thursday, October 2, 1997 Time: 9:38:00 am >With QDNS 1.1, what determines which root nameserver is used for a query? > Are root nameserves selected in a round-robin fashion with each query >going to the next one in line? > >I've noticed that if one of the 9 root-servers in acting up (as >h.root-servers.net did this morning), rather than a 1 in 9 chance of >getting a DNS entry not found error, I was getting progressively higher >and higher chances of entries not found, up to about an 8 in 9 chance. >In other words, after a while, almost every entry was coming up as DNS >not found. This was based on a lookup of about 40 distict domain names. > QuickDNS uses an algorithm which favors the server with the shortest response time. You might be interested in checking the following article, relating to the root server problem you experienced: http://www2.pageplop.com/pageplop/serverstatus.html --- Sigurdur Ragnarsson mailto:siggi@menandmice.com Men & Mice http://www.menandmice.com/

Messages In This Thread: Root server selection algorithm by Mikey on Oct 1, 1997 at 11:46:00 am Re: Root server selection algorithm by Sigurdur Ragnarsson on Oct 2, 1997 at 9:38:00 am Re: Root server selection algorithm by Mikey on Oct 3, 1997 at 10:23:00 am Re: Root server selection algorithm by Sigurdur Ragnarsson on Oct 3, 1997 at 6:52:00 pm Re: Root server selection algorithm by Scott Kozicki on Oct 3, 1997 at 8:15:00 pm Re: Root server selection algorithm by Scott Kozicki on Oct 3, 1997 at 8:17:00 pm Re: Root server selection algorithm by Mikey on Oct 4, 1997 at 10:01:00 pm Re: Root server selection algorithm by Mikey on Oct 4, 1997 at 10:01:00 pm