Re: DNS ROOT understanding

Thanks for this answear.

Is it possible to do a dump of the cache bind, then to reload it ?

For instance, the world interconnectivity of the dnscache server is down;
I can't reload the bind and have to "stop" or "kill" it.
Is it possible to dump the cache then keeping it and using it to reload bind
?

Thanks

nicolas liénard




----- Original Message -----
From: "Ladislav Vobr" <lvobr@ies.etisalat.ae>
To: "Nicolas LIENARD" <nlienard@fr.colt.net>
Cc: "Ladislav Vobr" <lvobr@ies.etisalat.ae>; "Jim Reid" <jim@rfc1035.com>;
"BIND Users Mailing List" <bind-users@isc.org>
Sent: Wednesday, September 29, 2004 6:50 AM
Subject: Re: DNS ROOT understanding


>I used to put "no recursion;" in the options and ndc reload the server,
> this will not discard the cache, but stops following up for any new
> recursive requests.
>
> This of course doesn't prevent the cached records to expire, they will
> still do as per their TTL, so it is not a miracle, but it will "calm
> down" the dns server basically telling him, there is no need to use all
> the cpu and retry thousands of requests, when there is a some kind of
> network loss.
>
> Ladislav
>
> Nicolas LIENARD wrote:
>>>if you know immediatelly that you have this kind of connectivity
>>>problems, you might possibly do some action, like disable recursion,
>>>reload, and serve the requests from the cache only, which is basically
>>>imho better than having completely over-utilized server with completely
>>>non-responsive service.
>>
>>
>> Many thanks ! I was only talking about in the case if the backbone,
>> where
>> is the dnscache, has a routage issue.
>> (i know that there is already a monitoring on root server 24/24 7/7).
>>
>> I didn't know it s possible to disable recursion and serve the requests
>> from
>> the cache only.
>>
>> Could you say me the way to do this kind of dns configuration ?
>>
>> Thanks in advance,
>>
>> Nicolas Li?nard
>>
>>
>>
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