[OpenSIPS-Users] CDRTool prepaid for big installation

[Adrian Georgescu]

On 12 Oct 2014, at 09:48, Satish Patel <satish.txt at gmail.com> wrote:

> I have run sipp test and it only able to handle 30 calls and later all call failed,

Can you explain what exactly failed?

> I heard from other user post, CDRTool prepaid can't handle many simultaneous running calls.

You heard wrong. It cannot handle high density call attempts like calls generated from call centers or transit peers like SIP trunks that push lot of calls. The number of simultaneous calls is irrelevant. You can have thousands of simultaneous calls with almost no performance penalty if the traffic is generated by regular SIP user devices.

> In our case single account will make many simultaneous calls and we need to handle them via prepaid.. 

It all depends on the meaning of many. Whenever a new call is attempted, the maximum remaining time of all ongoing calls of the same user must be recalculated so that the balance cannot be exceeded for any of them. This means that the more calls for the same user you have, the longer it takes to calculated everything over and over again.

If you have many users with a few calls each like in a residential scenario where a user makes one or perhaps two parallel calls, this would have little impact as there is little to re-calculate.

> Some one suggested don't use prepaid because of limitation and performance, and suggested use Postpaid or Quota system..  is that true?  

It all depends on the traffic patterns. Concurrent or simultaneous calls is one thing, high density calls/per second attempts is another. There is no hard limitation but the number of database queries, distance to MySQL database will affect how many calls you can handle because as I explained before all concurrent calls must be rerated in real time again for each new call attempt. If one SIP account generates 10K parallel calls the load is infinite while if you have 10K users with one call each the load is almost zero.

This is why a prepaid model is not practical for high density of calls and this has little to do with CDRTool, any other system would face the same problem, the load is compounded when adding more calls for same account. A quota based system is more appropriate for entities that generate large amount of calls as nothing has to be calculated on a per call basis.

Adrian

> On Thu, Oct 9, 2014 at 3:46 PM, <ag at ag-projects.com> wrote:
> Yes, it is capable.
> 
> On 08 Oct 2014, at 15:42, Satish Patel <satish.txt at gmail.com> wrote:
> 
> > Hi,
> >
> > Just want to know does CDRTool prepaid capable of handling couple hundreds of concurrent calls? I heard it can handle only 2/3 concurrent calls per account?  what is the solution if we want to host big prepaid system with thousands of users?
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> 
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--
Adrian



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