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From Ian Holsman <>
Subject Re: [RFC] -- adding DNS timeout/retry directives to the core
Date Tue, 05 Feb 2002 18:28:44 GMT
Ryan Bloom wrote:
> Why do your web servers rely on DNS at all?  If your config file doesn't
> specify HostNameLookup on, and you always use dotted quad notation, the
> server shouldn't ever use the DNS server.  If it does, I would consider
> that a showstopper.
we don't do hostname lookup on our new platform, but on our old one we 
do (and we have to, as it's too hard to change all the log-processing 

the other problem is the proxy code does a DNS lookup on each request. 
we can't use a quad notation for a couple of reasons, mainly
ease of administration, and using round robin DNS. so removing the DNS
request itself is out of the question.

> Ryan
> ----------------------------------------------
> Ryan Bloom        
> 645 Howard St.    
> San Francisco, CA 
>>-----Original Message-----
>>From: Ian Holsman []
>>Sent: Tuesday, February 05, 2002 9:54 AM
>>Subject: [RFC] -- adding DNS timeout/retry directives to the core
>>we got bit by this on one of our high-load development servers.
>>the DNS server hung, and all the webserver ground to a halt.
>>in 1.3 we had a custom module which tweaked the resolver's
>>retransmission time interval & #times to retransmit options
>>(in the global structure _res on most unixes)
>>now the questions..
>>	is this kind of thing available on win32/os2/beos etc?
>>	should this be a APR-function of just a auto-conf option?

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