sebb-2 wrote:
>
> On 09/11/2007, kingt <[EMAIL PROTECTED]> wrote:
>>
>> Dear all,
>>
>> As I need to stress a cluster of Tomcat servers, using a single JMeter
>> seems
>> insufficient.
>
> Have you tried using a single JMeter instance?
>
> Yes, in the previous platform which I use a 2-way SMP P3 machine to drive
> the workload. It seems okay to drive enough load to the cluster of 8
> machines for some applications. But I will switch to a new platform of P4
> machines, and the load driver is of same configuration as the web app
> servers, except more RAM. Some applications are based on SOAP and so
> running JMeter on single machine may not be enough to stress the cluster
> of 8 Tomcat servers. Do you have that experience? How many clients are
> required in such a case? Thanks.
>
>> I decide to try the JMeter remote testing.
>>
>> Since I have to test the web application LRU cache behavior, the input
>> sequence of the requests (each would access a cached web object) is
>> important to me.
>>
>> My input parameters carried on the requests are stored in a CSV file -
>> like
>> a proxy trace log. So I used the CSV data config component to drive the
>> workload. I wish to ask - under distributed mode, will each client
>> machine
>> feed alternate requests in coordinated manner or just feed redundant
>> request
>> samples at about the same instant as if each client has the same replica
>> of
>> the CSV file to the cluster?
>
> The CSV file needs to be present on each server host; each server will
> read its own copy.
>
> I suggest you partition the requests so each server exercises its own
> set of URLs.
>
> OIC. Then I feel this "distributed testing" feature is really of no big
> difference with manually having a shell script to start separate jmeter
> instances on different machines. But it has an advantage - merge of
> separate results. But will it give me the total/aggregated throughput and
> average latency, and how (e.g. what listeners and controls I should add
> but not affecting scalability)? Thanks.
>
>> Below example is to make it clear, suppose 3 remote clients are used and
>> the
>> CSV list is
>> A
>> B
>> C
>> D
>> E
>> F
>> ....
>>
>> Which of the following patterns will the request injection be:
>> Client0 Client1 Client2 Client3
>> ------ ------- ------ -------
>> A B C D
>> E F G H
>> ...
>
> No
>
>>
>> or
>>
>> Client0 Client1 Client2 Client3
>> ------ ------- ------ -------
>> A A A A
>> B B B B
>> C C C C
>> ...
>
> Yes
>
>>
>> I am also interested the answer to the same question for other components
>> like cookie manager.
>
> Each server runs independently.
>
> The client JMeter collects and merges sample results from each server,
> but there is no other co-operation between JMeter instances.
>
> It would not make sense for the cookie manager to be shared between
> JMeter instances - indeed cookies are not even shared between threads
> in the same instance, because threads represent separate users.
>
>
>
>> Thanks a lot for your help!
>>
>> --
>> View this message in context:
>> http://www.nabble.com/JMeter-Distributed-%28Remote%29-Testing-vs.-CSV-Data-Config-tf4778362.html#a13669189
>> Sent from the JMeter - User mailing list archive at Nabble.com.
>>
>>
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