[SR-Users] Dispatcher round-robin problems in 5.2

[Alex Balashov]

Hi Daniel,

Haven’t checked that, no. But all the external system does is issue RPC commands (`dispatcher.set_state`) maybe a few times a day. It’s nothing volatile or overly Byzantine.

—
Sent from mobile, with due apologies for brevity and errors.

> On Aug 12, 2019, at 11:24 AM, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
> 
> Hello,
> 
> could you observe similar behavior on other dispatchers that don't use
> an external system tomanage activation and deactivation of the gateways?
> Or you haven't checked such one so far?
> 
> Cheers,
> Daniel
> 
>> On 12.08.19 15:23, Alex Balashov wrote:
>> Hi,
>> 
>> I've got a proxy that does very basic round-robin distribution of calls
>> to an elastic pool of servers, defined in a simple SQLite database with
>> equal priorities. Nothing too complicated, just a vanilla
>> `ds_select_domain("1", "4")`. 
>> 
>> The only complication is that seldom are most of the gateways enabled.
>> Probing stuff was turned on, but didn't do quite what was desired, so it
>> was replaced with a system that manages activation and deactivation of
>> the gateways externally. Nevertheless, these are the left-over probing
>> settings:
>> 
>>   modparam("dispatcher", "ds_ping_method", "OPTIONS")
>>   modparam("dispatcher", "ds_ping_from", "sip:pinger at domain")
>>   modparam("dispatcher", "ds_ping_interval", 15)
>>   modparam("dispatcher", "ds_probing_threshold", 256)
>>   modparam("dispatcher", "ds_inactive_threshold", 1)
>>   modparam("dispatcher", "ds_probing_mode", 0)
>> 
>> After an upgrade from 5.1 to 5.2.3 (009f62), the round-robin has become
>> extremely "sticky" and tendentious. That is to say, it directs _almost_
>> all calls to a single gateway -- the first gateway in the table --
>> though not 100%. There is also a marked tendency to send lots of
>> consecutive calls to the same gateway, even if it's not the first one,
>> though most of the time it is.
>> 
>> Has anyone experienced similar upon upgrading to 5.2? 
>> 
>> Thanks much!
>> 
>> -- Alex
>> 
> -- 
> Daniel-Constantin Mierla -- www.asipto.com
> www.twitter.com/miconda -- www.linkedin.com/in/miconda
>