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From Brian Behlendorf <>
Subject Re: Nameserver cache
Date Wed, 22 Mar 1995 18:33:57 GMT
On Wed, 22 Mar 1995, Simon Spero wrote:
> This may or may not be atypical; 100 entries took me to about 70% on a 
> typical sunsite trace , which suprised me. 210 entries got me to the 90% 
> mark. If you're using pipes, though, you might as well cheat and use a 
> local caching named; UDP is quite fast to localhost, and if you move to 
> persistent processes, you can just set up a TCP connection and keep it 
> buzzing.

So... I'd like to see some performance tests between 
1) rst's nameserver cache 
2) David's pipes-based but more portable cache 
3) running a local named.  

If there's not an appreciable difference between 2 and 3 then I'd say 
let's leave it out - if there is a huge difference between 1 and 3 on 
platforms with mmap then let's leave it in as a #DEFINE.

We still need a good solid test suite - I just discovered one of the 
patches I recommended yesterday is dumping core on /cgi-bin/printenv.. 



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