defining service ceilings

[Sebastian Castro Avila]

On Tue, 12 Apr 2005 14:32:17 +0800 (CST), Joe Shen <sj_hznm at yahoo.com.cn>  
wrote:

> Hi,
>
>> In testing conducted by our engineers, we reach a
>> limit of 55,000 qps
>> under a Giga Ethernet link, Pentium Xeon 3.0 Ghz
>> (SMP) and using NSD.
>>
>> Using a FastEthernet link, we got 30,000 qps (all
>> traffic that network
>> card could handle) with NSD or BIND 9.
>
> What data did you use in your test? and Is the above
> data reflect ability of a Cache server?
>

Our test were about an authoritative-only server. And the dataset was  
taken from the querylog file.


> I measured our new DNS cache server ( BIND9 + Sun V240
> with Dual CPU + Solaris 9, 100Mbps ethernet); If I
> test a new named process, the limit of query is around
> 3400qps ( both CPU got a 100% load), after executing
> the query for threee times, the limit is 7400qps.
>
> Is there any problem with my BIND configuration? or
> would you please share your configuration?
>

I think those numbers are quite well for a cache server. You should be  
careful with your testing data, because any wrong configured domain will  
take your numbers down.

If you are worried about performance, is very important to switch off  
query logging. When we made our tests and without logging, we got a 20%  
performance increase.

Best Regards

> regards
>
> Joe
>
>
>
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-- 
Sebastian E. Castro Avila             sebastian at nic.cl
Administrador de DNS, NIC Chile
Fono: (2) 9407705                  Fax  : (2) 9407701