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From Nirmal Fernando <nirmal070...@gmail.com>
Subject Re: [Autoscaling] Allowing users to configure an upper and a lower limit of threshold values
Date Tue, 29 Apr 2014 17:10:23 GMT
hmm... do we have a discussion on what we are planning to do?


On Tue, Apr 29, 2014 at 10:36 PM, Lahiru Sandaruwan <lahirus@wso2.com>wrote:

> Sent from my mobile.
>
> On Apr 29, 2014 10:29 PM, "Nirmal Fernando" <nirmal070125@gmail.com>
> wrote:
> >
> > Asiri could build on top of my changes, I suppose?
>
> We can eliminate these factors and threshold limits completely then.
>
> >
> >
> > On Tue, Apr 29, 2014 at 10:15 PM, Lahiru Sandaruwan <lahirus@wso2.com>
> wrote:
> >>
> >>
> >>
> >>
> >> On Tue, Apr 29, 2014 at 9:52 PM, Nirmal Fernando <
> nirmal070125@gmail.com> wrote:
> >>>
> >>> Lahiru, this should be ok right?
> >>
> >>
> >> Yes. But for 4.1.0, we will be counting the required number of
> instances with proposed Gsoc project by Asiri.
> >>>
> >>>
> >>>
> >>> On Tue, Apr 29, 2014 at 7:21 PM, Nirmal Fernando <
> nirmal070125@gmail.com> wrote:
> >>>>
> >>>> 4.1.0
> >>>>
> >>>>
> >>>> On Tue, Apr 29, 2014 at 12:18 PM, Lahiru Sandaruwan <lahirus@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 <
> nirmal070125@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: lahirus@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/
> >>>
> >>>
> >>>
> >>>
> >>> --
> >>> 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: lahirus@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/
>
>


-- 
Best Regards,
Nirmal

Nirmal Fernando.
PPMC Member & Committer of Apache Stratos,
Senior Software Engineer, WSO2 Inc.

Blog: http://nirmalfdo.blogspot.com/

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