Hi alex,
I tried configuring the polymix test for 2000 urls.
This was my setup.I used 4 client-server pairs with the
"TheBench.peak_req_rate = 2000/sec;
in all the client and server polymix-4.pg files and also in
the DNS system.Each client will generate a maximum of
500 req/sec and hence 4 pairs should generate 2000 req/second.
I could not complete the test as polymix ran out of memory
and the test ended abruptly.I went through the FAQs in the site
and the reason said is that the cache is not fast enough to respond
to polymix.
These are my queries::
1.Can i avoid the running out of memory situation by increasing
the number of client server pairs??
2.Is there any parameter i can change in polymix setup such that
it can wait for longer time for the cache to respond and hence the
running out of memory situation can be avoided?
thanx for your responses.
regards,
Senthil
Alex Rousskov wrote:
>Senthil,
>
> I was addressing the first part of your e-mail, the one that
>mentions "2500 urls per second, with a throughput of 150 Mbits/second"
>condition. Sorry for not answering the urls/second question, which I
>misread.
>
>As Henrik already pointed out, there is no difference between request
>rate and URL rate because each Polygraph request is for a single URL.
>HTTP defines that relationship to be 1:1 because one request message
>has exactly one Request-URI parameter.
>
>Polygraph does report request (URL) rate and bandwidth consumption for
>both client and server sides.
>
>HTH,
>
>Alex.
>
>
>On Mon, 31 May 2004, senthil wrote:
>
>>u mean to say that setting 135req/sec(in polymix-4.pg) will generate
>>2500 urls/second?? how do i convince my client that 135 req/second
>>corresponds to 2500 urls/second. is there any statistics in the
>>polymix report relating to this info??
>>
>>thanx for the response.
>>cheers,
>>Senthil
>>
>>Alex Rousskov wrote:
>>
>>>On Fri, 28 May 2004, senthil wrote:
>>>
>>>> I have to run an urgent test on the cache and generate a
>>>>report for my customer requirement. He asks to generate a report
>>>>requesting 2500 urls per second , with a throughput of 150
>>>>Mbits/second. Im not sure how to configure the polymix bed for
>>>>generating the required result.
>>>>
>>>>is the requests/sec we set in polymix-4.pg in any way related with
>>>>the number of urls/second?? if not could any1 help me with this.
>>>>
>>>In PolyMix, you specify peak request rate. That rate, naturally, will
>>>correspond to some peak throughput (proportional to mean response
>>>size). Looking at last cache-off reports, 2500/sec load approximately
>>>corresponds to 135 req/sec.
>>>
>>>You can modify PolyMix-4 response sizes and/or request type
>>>composition to get the desired throughput for a given load. This
>>>modification will require some experimentation to get the resulting
>>>throughput right, since the traffic model is not simple. Your results
>>>will not be, strictly speaking, PolyMix-4 results then. If your
>>>customer needs PolyMix-4 results, they should not ask for both load
>>>and throughput levels.
>>>
>>>HTH,
>>>
>>>Alex.
>>>
>>
>
>
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