caching-namserver

[Bob Goodwin]

Ed Greshko wrote:
> Bob Goodwin wrote:
>
>   
>> *Ethereal might work but set-up is beyond me!  I'll have to look at that
>> for a while.  But "locate" found "tetehereal" which showed DNS activity
>> clearly on the first lookup and nothing on subsequent tries which I
>> interpret as an indication that it is working.  The times measured with "host" are
>> still varying widely from as little as ~10 ms to typically a bit more than 100 ms?
>>     
>
> Could be a function of how busy your system and/or CPU size, memory, etc.
>
>   
>> And the need to rewrite "resolv.conf" after reboot is bothersome as is the
>> loss of the cached address data when that is done although I suspect
>> that may be done to accommodate address changes?
>>     
> *
> Well, you can prevent "resolv.conf" from being overwritten.  You uncheck
> the "Automatically obtain DNS information from provider" selection in
> the configuration of your Internet connection.
> *
That wouldn't be a viable solution.
> *
> You will lose the cache on a reboot since that information is contained
> in memory.
>
> Also, if you don't access a given site again within the time specified
> by the TTL (Time To Live) setting of the master DNS the cache for the
> host will be cleared and a new request will be sent.
> *
*Interesting, now I'm curious to see what "TTL" is set to?
*
> *
> Ed
> *
*Thanks for the help.

BobG*