[Haskell-cafe] Modeling the performance of a non-trivial software app

[David Sorokin]

On 05/11/2011 07:55 AM, C K Kashyap wrote:
> Hi,
> I was wondering if it would be a good idea to model a software app's 
> performance using Haskell. The idea is a little abstract in my mind 
> right now. I'll try and illustrate it with an example - Let's say, I 
> want to model a web app - to, model it, I could think of the following 
> entities -
>
> 1. One or more clients and as many connections (essentially bandwidth 
> of each connection)
> 2. A Load balancer ( and bandwidths to the webservers)
> 3. Bunch of webservers (and bandwidths to the database server)
> 4. A database server
>
> Using the model, I could generate performance characteristics and 
> figure out if database is the bottleneck or not ... if so, what level 
> of  sharding would be useful etc
>
> Is there already a wheel I am trying to re-invent? Has anyone 
> attempted this?
>
> Regards,
> kashyap
>
>
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Sometimes it is possible to write the corresponded model. Then the model 
can be simulated to receive the performance characteristics. Much 
depends on that how precise the model is. The keywords are Discrete 
Event Simulation (DES) and Theory of Queue. It may require some maths.

I wrote a small library called Aivika[1]. Perhaps it might be helpful.

David

[1]http://hackage.haskell.org/package/aivika

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