Re: check expression proposal.

[Vlad W. <wvl...@gm...>]

Mercury LoadRunner uses C interpreter as the script engine. LR does not
provide desired performance (for single load generator machine) as well.
However, performance bottleneck is not in scripting but in protocol handling
(socket operations, HTTP analysis, infrastructure and OS impact, etc.).

The problem of scripting (like LR etc.) vs. configuration file using
(curl-loader batch) is rather architectural difficulty than performance, I
think. LR runs each virtual client in separate thread, while the scripting
engine instance exists for each client, whith its own context. Curl-loader
runs a lot of virtual clients in single thread. Script running become be
quite complicated in this case.

So, if high performance is the main target and curl-loader architecture is
the final choice, the client configuration is seemed to be right solution.

Thanks,
Vlad


On 7/4/07, Robert Iakobashvili <cor...@gm...> wrote:
>
> On 7/4/07, Aleksandar Lazic <al-...@no...> wrote:
> > On Mit 04.07.2007 11:12, Robert Iakobashvili wrote:
> > >On 7/4/07, Michael Moser <mos...@gm...> wrote:
> > >> Proposal for limited scripting facility in curl-loader
> > >
> > >Great!
> >
> > Yep, but what is wrong with one of the allready exists embeddable
> > Languages?!
>
> There are great tools very flexible with various scripting support:
> - JMeter;
> - OpenSTA;
> - WebLoad;
>
> They are very flexible and have a great set of features,
> that we would like to implement.
> Does open-source community really need a one more
> JMeter/OpenSTA/WebLoad?
>
> What is indeed required may be Ixia IxLoad or Spirent Avalanche,
> which are of less flexibility, but have 100 - 10000 higher loading
> capacity.
>
> A friend of mine is using OpenSTA for rather simple load, and they are
> using 20 PC computers (2 racks) to create a load of 50 000 connections.
>
> We would like to provide a 10 -100 higher loading
> capacity (than JMeter) with a good set of features and a high degree
> of flexibility.
>
> Therefore, C is the choice and SSL acceleration to HW is a future option.
>
>
> Sincerely,
> Robert Iakobashvili,
> coroberti %x40 gmail %x2e com
> ...........................................................
> http://curl-loader.sourceforge.net
> A web testing and traffic generation tool.
>
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