4.1.0
On Tue, Apr 29, 2014 at 12:18 PM, Lahiru Sandaruwan <lahi...@wso2.com>wrote:
> Hi Nirmal,
>
> Which release do you plan to add this feature?
>
> Thanks.
>
>
> On Tue, Apr 29, 2014 at 6:08 AM, Nirmal Fernando
> <nirmal070...@gmail.com>wrote:
>
>> Hi All,
>>
>> Current auto-scaler takes only the 'average' threshold value from a
>> user's auto-scaling policy. Then inside the scaling related drools rules it
>> calculates an upper bound and a lower bound by multiplying the average
>> threshold value by two non-configurable constants.
>>
>> scaleUp : Boolean() from ((rifReset && (rifPredictedValue >
>> rifAverageLimit * *0.8*)) || (mcReset && (mcPredictedValue >
>> mcAverageLimit * 0.8)) || (laReset && (laPredictedValue > laAverageLimit *
>> 0.8)))
>> scaleDown : Boolean() from ((rifReset && (rifPredictedValue <
>> rifAverageLimit ** 0.1*)) && (mcReset && (mcPredictedValue <
>> mcAverageLimit * 0.1)) && (laReset && (laPredictedValue < laAverageLimit *
>> 0.1)))
>>
>> IMO this is a limitation and we could make these constants configurable
>> via auto-scaling policy.
>>
>> So, I propose following format to the auto-scaling policy:
>>
>> {
>> "id": "autoscale-policy-1",
>> "loadThresholds": {
>> "requestsInFlight": {
>> "upperLimit": 30,
>> "lowerLimit": 5
>> },
>> "memoryConsumption": {
>> "upperLimit": 80,
>> "lowerLimit": 50
>> },
>> "loadAverage": {
>> "upperLimit": 100,
>> "lowerLimit": 20
>> }
>> }
>> }
>>
>> Then, we can modify the rule to consider user-defined threshold values
>> when taking the scaling decision.
>>
>> Let me know your thoughts.
>>
>> --
>> Best Regards,
>> Nirmal
>>
>> Nirmal Fernando.
>> PPMC Member & Committer of Apache Stratos,
>> Senior Software Engineer, WSO2 Inc.
>>
>> Blog: http://nirmalfdo.blogspot.com/
>>
>
>
>
> --
> --
> Lahiru Sandaruwan
> Committer and PPMC member, Apache Stratos(incubating),
> Senior Software Engineer,
> WSO2 Inc., http://wso2.com
> lean.enterprise.middleware
>
> email: lahi...@wso2.com cell: (+94) 773 325 954
> blog: http://lahiruwrites.blogspot.com/
> twitter: http://twitter.com/lahirus
> linked-in: http://lk.linkedin.com/pub/lahiru-sandaruwan/16/153/146
>
>
--
Best Regards,
Nirmal
Nirmal Fernando.
PPMC Member & Committer of Apache Stratos,
Senior Software Engineer, WSO2 Inc.
Blog: http://nirmalfdo.blogspot.com/
