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Posted to users@trafficserver.apache.org by Mav Peri <ma...@optasports.com> on 2011/09/21 19:11:50 UTC

dns

Hi Guys,


Does ATS cache the dns entry for a url? I am experiencing a strange
amazon elastic load balancer (ELB) issue and I am wondering if it has to
do with ATS caching the ip the load balancer cname points to.


Basically ELBs change their IPs as they scale up and down. I wonder if
ATS caches that and it still resolves to the old IP


Any ideas?

 

MAv

RE: dns

Posted by Mav Peri <ma...@optasports.com>.

Thanks leif,


How can I override this so that entries are not cached for more than 30 seconds?

 

 

From: Leif Hedstrom [mailto:zwoop@apache.org] 
Sent: 21 September 2011 18:47
To: users@trafficserver.apache.org
Cc: <us...@trafficserver.apache.org>
Subject: Re: dns

 

We will cache the DNS response for the time allowed by the authoritated server (the TTL of the record).




-- leif

 

-- leif


On Sep 21, 2011, at 10:11 AM, "Mav Peri" <ma...@optasports.com> wrote:

	Hi Guys,

	
	Does ATS cache the dns entry for a url? I am experiencing a strange amazon elastic load balancer (ELB) issue and I am wondering if it has to do with ATS caching the ip the load balancer cname points to.

	
	Basically ELBs change their IPs as they scale up and down. I wonder if ATS caches that and it still resolves to the old IP

	
	Any ideas?

	 

	MAv

	 


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Re: dns

Posted by Leif Hedstrom <zw...@apache.org>.

We will cache the DNS response for the time allowed by the authoritated server (the TTL of the record).

-- leif

-- leif

On Sep 21, 2011, at 10:11 AM, "Mav Peri" <ma...@optasports.com> wrote:

> Hi Guys,
> 
> 
> Does ATS cache the dns entry for a url? I am experiencing a strange amazon elastic load balancer (ELB) issue and I am wondering if it has to do with ATS caching the ip the load balancer cname points to.
> 
> 
> Basically ELBs change their IPs as they scale up and down. I wonder if ATS caches that and it still resolves to the old IP
> 
> 
> Any ideas?
> 
>  
> 
> MAv
> 
>