[OpenSIPS-Users] opensips 1.6.4 load balancing performance

[Bogdan-Andrei Iancu]

Hi Iulian,

Regarding your first issue, with the load:

 1) I suppose you do the lb stuff only for the initial request right ?

 2) you say you see the xlog() for all the received calls, so all 
received calls pass the lb function...but you do not see all calls being 
sent out, right ?


Related to the second issue (with 2 logs for a single call), I suspect 
it may be a retransmission issue. To be sure, print in your xlog the 
callid also (to be sure it is the same request) . Var for callid is $ci.

Regards,
Bogdan


Iulian Macare wrote:
> Hello
>
>
> I have installed OpenSips 1.6.4 on CentOS 5.5 32bit with load 
> balancing & mysql support ; I want to balance calls to 2 asterisk 
> servers . I am sending traffic to opensips from 1 x  gnudialer & 1 x 
> vicidial ( so from predictive dialers ). Situation is like this:
>
>
> +----+----------+--------------------------+-----------+------------+-------------+
> | id | group_id | dst_uri                  | resources | probe_mode | 
> description |
> +----+----------+--------------------------+-----------+------------+-------------+
> |  1 |        1 | sip:192.168.254.241:5060 
> <http://192.168.254.241:5060> | pstn=300  |          0 |             |
> |  2 |        1 | sip:192.168.254.242:5060 
> <http://192.168.254.242:5060> | pstn=300  |          0 |             |
> +----+----------+--------------------------+-----------+------------+-------------+
>
> 600 channels in total , and I send around 500 channels ; OpenSips 
> drops a lot of calls; By drop I mean a call that is not sent to one of 
> those 2 asterisk servers that I have.
>
> The code for balancing in this situation is:
>
> if (uri=~"^sip:0[1-9][0-9]*@") {
>         load_balance("1","pstn");
>     xlog("sending call $ru to $du\n");
>     t_relay();
>     exit;
>     }
>
> ! An important thing to say is that in /var/log/messages I see the 
> specific number that is sent to 192.168.254.241 for example ; So the 
> parameter xlog("sending call $ru to $du\n"); works ; The problem is 
> that in logs on 192.168.254.241 that number never arrives in asterisk 
> logs ; In logs of vicidial & gnudialer I see it like congestion.
>
> If I do something like this:
>
> +----+----------+---------------------+-----------+------------+-------------+
> | id | group_id | dst_uri             | resources | probe_mode | 
> description |
> +----+----------+---------------------+-----------+------------+-------------+
> |  1 |        1 | sip:192.168.254.241    | pstn=150   |          0 
> |             |
> |  2 |        2 | sip:192.168.254.241    | pstn=150   |          0 
> |             |
> |  3 |        1 | sip:192.168.254.242    | pstn=150   |          0 
> |             |
> |  4 |        2 | sip:192.168.254.242    | pstn=150   |          0 
> |             |
>
> And I split opensips balancing in 2
>
>
> if(src_ip==192.168.3.10 )
>         {
>         load_balance("1","pstn");
>        xlog("sending call to $du\n");
>         t_relay();
>         exit;
>         };
>
> if(src_ip==192.168.3.11 )
>         {
>         load_balance("2","pstn");
>        xlog("sending call to $du\n");
>         t_relay();
>         exit;
>         };
>
>
> and by doing this I get the same numbers of channels on opensips ( 
> around 500 channels ) but I am splitting in 2 groups of load 
> balancing; It can process all the calls.
>
> Another question that I saw is that when I make a single call to 
> opensips and I involve load balancing in /var/log/messages I get 2 
> times the same message .. just like it send 2 time to asterisk server 
> the call .. but on asterisk I receive only one time.
>
> Mar 10 14:58:47 opensips /usr/local/sbin/opensips[27611]: sending call 
> to sip:192.168.254.241
> Mar 10 14:58:47 opensips /usr/local/sbin/opensips[27611]: sending call 
> to sip:192.168.254.241
>
>
> Isn't load balancing fast enough the process the calls made by 
> predictive dialers, when over 300 channels is sent .. ?  Or I have 
> some mistakes made .
>
>
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>
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-- 
Bogdan-Andrei Iancu
OpenSIPS eBootcamp - 28th February 2011
OpenSIPS solutions and "know-how"