[OpenSIPS-Devel] [OpenSIPS-Users] Queue management system and load balancer.

[Bogdan-Andrei Iancu]

Hi Grygoriy,

just my (other) 2 cents on this.

the calls in the queue (as time as the fr_inv_timer is the same) will 
jump out from queue in the same order as entered (more or less).

the biggest problem is (as you said) to avoid new calls to be delivered 
before the  queued one.

So, what you can do is to use a  dialog profile to  monitor the queued 
calls and as time as there are calls in this profile, do not directly 
deliver new calls, but simple push them into the queue.

Regards,
Bogdan



Grygoriy Dobrovolskyy wrote:
> Good day everyone, i would like to discuss about load_balancer module 
> and a way i really need to use opensips. Load balancer is a great 
> tool, in my case resource are agents. In my project i need to receive 
> all incoming calls and load balance them to 5 destinations with X 
> agents. The number of agents is changing. We were able to create a 
> script which is reading the number of agents logged in, and transfer 
> that data to mysql opensips table. Let's say we do it every 5 min. The 
> problem i am facing is simple to explain; What should we do when there 
> are no agents ? I can not dispatch to same servers as it will break 
> the system. Bogdan suggested to pass them to some other server with 
> fr_inv_timer set to 10 for example, that server generate early media, 
> when timer goes off we check if there are resources, and do same again 
> if there are none. It will work if i don't get too much calls. The 
> main problem occurs when there are 50 calls waiting and fresh call 
> coming in. It is impossible to guarantee that the first call which 
> came it will be served first, and this is what exactly i am trying to 
> achieve. I am staring to think about some kind a tag system, which 
> tags each call forwarded call to "waiting queue" and a some way of re 
> inviting the call "first in line" when i have a free resource. Is 
> there any way in this world to do that ? I am open to any propositions 
> with any hardware&software involved. Of cource i would like that one 
> day opensips is able to do that by himself. Am i alone in that demand 
> ? Do we need actually a more advanced opensips call management module 
> ? maybe with any other product (*/FS) interaction ?
>
> Looking to hear from you.
>
> Grygoriy Dobrovolskyy.
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