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From Jarrod Slick <jar...@e-sensibility.com>
Subject Re: [users@httpd] Apache vs LiteSpeed
Date Fri, 15 Jan 2010 17:00:03 GMT

On Jan 15, 2010, at 10:45 AM, Tom Evans wrote:

> On Fri, Jan 15, 2010 at 4:29 PM, Jarrod Slick <jarrod@e-sensibility.com 
> > wrote:
>> I'm curious -- why do you think that the results will be  
>> inconsistent?  If
>> anything I would be inclined to think that using localhost would  
>> improve
>> consistency as extraneous variables like network congestion at the  
>> time of
>> testing would not be present.
>>
>
> There is no way you can fully load a webserver using a single instance
> of a testing tool running on the same box. For starters, the testing
> tool will end up consuming more CPU than the webserver, invalidating
> your test results.
>
> For a followup point, I would think that you would need multiple
> instances of the testing tool, running on multiple boxes, to fully
> load a server.
>
> Certainly, you would need multiple instances of ab (which is what
> LiteSpeed used to do their tests), as ab is not particularly good. A
> better tool is Apache flood, or siege, either of which will stress the
> server much harder than ab.
>
> Network congestion/latencies could also affect the test result, which
> is why you would run these tests multiple times, using a dedicated
> switch (ie not connected to anything else).
>
> Cheers
>
> Tom
>
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What about having a private VLAN between a testing machine and the  
apache machine.  I suppose that would solve the resource separation  
problem between the benchmarking tool and the web server.  Can you  
think of any problems with this type of setup?

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