[Olsr-dev] [PATCH v1 0/3] Use bandwidth during gateway selection

[Ferry Huberts]

On 27-07-12 15:35, Teco Boot wrote:
> Me, as dummy, get easily confused.


Ik weet niet hoor, maar dit is wat je zelf hebt voorgesteld....
Nu wil je het opeens weer anders.
Prima, maar dan zou het wel goed zijn als je even meldt dat ik jouw 
originele voorstel als patch heb verstuurd.
Dit doet mij in een wat minder prettig licht staan en dat vind ik wat 
minder grappig

>   - Factors should be multipliers.
>   - Lower data rate links would have high influence, in a balanced way.
>
> My proposal:
>    Config option:                   Recommended value:   Default:
>    ==============================   ==================   ========
>    SmartGatewayWeightEtx            1.00                 1.00
>    SmartGatewayWeightExitLinkUp     1.00                 0.00
>    SmartGatewayWeightExitLinkDown   1.00                 0.00
>
> And calculate such as:
>
>    SmartGatewayWeightExitLinkUp
>   ------------------------------
>
>                          SmartGatewayWeightExitLinkUp
>     costExitLinkUp = -----------------------------------
>                      SmartGatewaySpeed(upstream) *  1000
>
>                          SmartGatewayWeightExitLinkDown
>     costExitLinkDown = -----------------------------------
>                        SmartGatewaySpeed(upstream) *  1000
>
>     costEtx = SmartGatewayWeightEtx * PathEtxCost / 4
>
>
>     gw_cost =  costExitLinkUp + costExitLinkDown + costEtx
>
>
> Teco
>
>
> Op 27 jul. 2012, om 14:06 heeft Ferry Huberts het volgende geschreven:
>
>>
>>
>> On 27-07-12 13:59, Daniel Nitzpon wrote:
>>> Hi!
>>>
>>> Am 27.07.2012 13:21, schrieb Teco Boot:
>>>> I also want to see comments. Maybe also:
>>>>   - not interest in SmartGW at all
>>>>   - interested, but not tried yet
>>>
>>>>
>>>> Op 27 jul. 2012, om 12:50 heeft Henning Rogge het volgende geschreven:
>>>>
>>>>> I would like to hear some comments about this from someone who has
>>>>> USED the SmartGW system.
>>>
>>> Haven't used it yet, sorry..
>>> But still a comment:
>>>
>>>>> On 07/26/2012 04:23 PM, Ferry Huberts wrote:
>>>>>> - We calculate a new path cost of
>>>>>>
>>>>>>      new_path_cost = (1 / (uplink + downlink)) + (tc_path_cost / 4)
>>>>>>
>>>>>>    (uplink and downlink in Mbps)
>>>>>>    (the 1 and 4 are weighing factors and we can make then configurable)
>>>
>>> Freifunk experience here tells that in shared gateways via ADSL the
>>> uplink is usually a much more limiting factor than the downlink. So I
>>> would propose something along the lines of
>>>
>>> new_path_cost = (1 / 2*(min (uplink*4, downlink))) + (tc_path_cost / 4)
>>>
>>> (without having a real opinion on the weighting factors, just introduced
>>> 1/2 to preserve the magnitude of the original suggestion)
>>>
>>
>> Interesting point.
>> I did think about this a few days ago, but wanted to propose the simple scenario first ;-)
>>
>> How about scaling the combined bandwidth back with an asymmetry factor, something like:
>>
>>
>> asym = (uplink > downlink) ? (downlink/uplink) : (uplink/downlink)
>> new_path_cost = (1 / (asym * (uplink + downlink))) + (tc_path_cost / 4)
>>
>>> Daniel
>>>
>>
>> --
>> Ferry Huberts
>>
>> --
>> Olsr-dev mailing list
>> (spam-protected)
>> https://lists.olsr.org/mailman/listinfo/olsr-dev
>

-- 
Ferry Huberts