[SR-Users] Dispatcher flow regarding weight and priority.

[Joel Serrano]

Yeah I thought it might be like that!

Thanks for clarifying this ;)

Cheers,
Joel.

On Mon, Dec 11, 2017 at 06:39 Dmitri Savolainen <savolainen at erinaco.ru>
wrote:

> Hi, Joel!
>
> You may  call ds_select_dst for two sets:
> set 1 with 1.1.1.1  ds_select_dst("1", "4")
> set 2  with 2.2.2.2 and 3.3.3.3. If set1 is down (ds_select_dst("1",
> "4")==false)  then try ds_select_dst("2", "9")
>
>
>
>
> 2017-12-07 20:47 GMT+03:00 Joel Serrano <joel at gogii.net>:
>
>> Hi all,
>>
>> I have a doubt regarding how dispatcher selects a node...
>>
>> From the docs:
>>
>>
>> *[...]*
>> *alg* - the algorithm used to select the destination address. The
>> parameter can be an integer or a variable holding an interger.
>>
>>
>>    -
>>
>>    “4” - round-robin (next destination).
>>    -
>>
>>    “8” - select destination sorted by priority attribute value (serial
>>    forking ordered by priority).
>>    -
>>
>>    “9” - use weight based load distribution. You have to set the
>>    attribute 'weight' per each address in destination set.
>>
>> *[...]*
>>
>>
>> I normally use "4", so dispatcher round-robins through the destinations
>> of a setid, but I have now the following doubt:
>>
>> If a trunk has 3 nodes, say 1.1.1.1, 2.2.2.2, 3.3.3.3
>>
>> Can I do:
>>
>> Send all calls to 1.1.1.1, if it goes down, then do a 80%-20% between
>> 2.2.2.2 and 3.3.3.3.
>>
>>
>> if the trunk has a correct DNS SRV setup with weight and priority it's
>> easy to achieve, but in this case there is no SRV or nothing, just 3 IPs.
>>
>> So can this logic be achieved with dispatcher directly? Can do some
>> combination of alg "8" and alg "9"?
>>
>> Or would the correct approach need two separate setid groups and handle
>> that logic in failure route?
>>
>>
>>
>> Thanks,
>> Joel.
>>
>>
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>>
>
>
> --
> Savolainen Dmitri
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