defining service ceilings

[Tim Peiffer]

Yup, I dropped a power of 10.. that should have read we were able to 
establish a service ceiling of 55,000 qps.

I am looking for validation of method mostly..

Tim

Sebastian Castro Avila wrote:

>On Mon, 11 Apr 2005 13:38:07 -0500, Tim Peiffer <peiffer at umn.edu> wrote:
>
>  
>
>>Are there any BCP documents that cover methodologies for measuring or
>>defining the maximum number of queries that a DNS server is capable
>>of?    Are there any defined test suites that we should be running?  I
>>am looking for documentation that would help validate the testing that
>>we have already done.
>>
>>Example:
>>We recently installed new hardware that replaced our authoritative
>>nameservers.  The hardware used to be run on FreeBSD 4.X, and Bind 8.X.
>>Daily  query averages are running approximately 600 qps total across all
>>of the servers.  After replacing the hardware with Sun V60 and RedHat
>>AS,  we were able to create a query source file and use the queryperf
>>utility, we were able to establish a service ceiling of approximately
>>5500qps.
>>
>>    
>>
>
>That looks like a very short number.
>
>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.
>
>Also we run some authoritative servers for a TLD and we have received  
>peaks of 2500 qps, and a bunch of servers acting as slaves for many of our  
>child zones receiving peaks of 4000 qps. IMHO, you should try to repeat  
>your tests.
>
>Best Regards
>
>
>  
>
>>Tim Peiffer
>>Networking and Telecommunications Services.
>>University of Minnesota
>>
>>    
>>