Postcards from the Bleeding Edge
Monday, November 08, 2004

  DNS performance goes to hell... to fight spam?

A couple internet veterans griped at me today:The world's most distributed database is breaking down, because people are afraid to cache anything... and we're still not using good crypto. It's SPF, says one... Self centered stupidity says another:

It's the collapse of the commons! sez a third... The internet. No one owns it. Everybody can use it. "Everyone can improve it".

Although I gain clarity in my DNS files by using CNAME chains, I cause two or three DNS lookups for every access to my web site and mail server. The packet overhead isn't much, but the added latency does add up. Note to self - REFORM! do a global search and replace on my DNS records so I return to a 1 to 1 match between IP and name... And:

Big sites using a TTL of 0 completely thwarts the intent of the several million DNS caches on the internet, to what end? There are far better load balancing solutions. If millions of sites set TTL to 0, the Net would collapse....
 
Comments:
Here’s a Broadband Video that will show you how to check availability by postcode, how perform a broadband speed test and where to find broadband forums to answer your questions. There are also offers for PlusNet Broadband.

Here is a broadband beginners guide and below are common broad band questions;
>What is Broadband?
>Types of Connections?
>Connection speeds and download limits
>How to compare ISP’s
 
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David Täht writes about politics, space, copyright, the internet, audio software, operating systems and surfing.


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