Lahiru, what I said was to 'build up its own information model, on top of topology model.', not to build up everything. So, the idea is you build up a model while keeping references to the existing topology model.
On Wed, Oct 23, 2013 at 12:26 PM, Lahiru Sandaruwan <[email protected]>wrote: > > > > On Wed, Oct 23, 2013 at 12:11 PM, Nirmal Fernando > <[email protected]>wrote: > >> Lahiru, >> >> IMO autoscaler needs to build up its own information model, on top of >> topology model. This is applicable for all Stratos components. >> > > It is a overhead to have a separate model for few parameters. Topology is > currently used by LB and Autoscaler. It already has details which is > specific to LB. > > Also in autoscaler side, it has parameters specific for clusters as well > as members. So if we implement a separate information model in Autoscaler > side, it has to override all the topology message processors to detect > topology events. > > So the users of topology can ignore the parameters they do not require. > >> >> >> On Wed, Oct 23, 2013 at 11:57 AM, Lahiru Sandaruwan <[email protected]>wrote: >> >>> Hi Nirmal, >>> >>> Autoscaler needs the service id for finding cluster. Otherwise it has to >>> traverse through all services to find it. Please add service id to the >>> event. >>> >>> Thanks. >>> >>> >>> On Mon, Oct 21, 2013 at 1:50 PM, Nirmal Fernando <[email protected] >>> > wrote: >>> >>>> >>>> >>>> >>>> On Mon, Oct 21, 2013 at 1:25 PM, Lahiru Sandaruwan <[email protected]>wrote: >>>> >>>>> Hi Nirmal, >>>>> >>>>> Nice work! >>>>> >>>>> On Sun, Oct 20, 2013 at 11:46 PM, Nirmal Fernando < >>>>> [email protected]> wrote: >>>>> >>>>>> Hi All, >>>>>> >>>>>> I've successfully integrated Stratos LB and WSO2 CEP (selected CEP >>>>>> engine). >>>>>> >>>>>> Load balancer and CEP is communicating via Observer pattern, where a >>>>>> statistics collector in LB acting as the subject and CEPs act as >>>>>> Observers. >>>>>> Stats collector periodically notifies all the registered observers, so >>>>>> that >>>>>> they can act upon changes. I'm committing the changes soon. >>>>>> >>>>>> Now, when I load Stratos LB, CEP emits periodical aggregated >>>>>> statistics on requests in flight at LB level, to a topic. >>>>>> >>>>>> Following are few aggregated stats emitted by CEP: >>>>>> >>>>>> >>>>>> {"average_requests_in_flight":{"cluster_id":"c1","value":"78.66666666666667"}} >>>>>> >>>>>> {"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"0.17776829680194836"}} >>>>>> >>>>>> {"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.0666637038353851"}} >>>>>> >>>>> >>>>> Hope above three are separate events sent to the topic >>>>> "summarized_stat_topic". Autoscaler will get these and keep latest values >>>>> against cluster "c1". >>>>> >>>> >>>> Lahiru, yes correct. (summarized-health-stats topic) >>>> >>>>> >>>>> Thanks. >>>>> >>>>>> >>>>>> >>>>>> {"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"-0.004444888953094816"}} >>>>>> >>>>>> {"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.04444246922359006"}} >>>>>> {"average_requests_in_flight":{"cluster_id":"c1","value":"9.5"}} >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Best Regards, >>>>>> Nirmal >>>>>> >>>>>> Nirmal Fernando. >>>>>> PPMC Member & Committer of Apache Stratos, >>>>>> Senior Software Engineer, WSO2 Inc. >>>>>> >>>>>> Blog: http://nirmalfdo.blogspot.com/ >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> -- >>>>> Lahiru Sandaruwan >>>>> Software Engineer, >>>>> Platform Technologies, >>>>> WSO2 Inc., http://wso2.com >>>>> lean.enterprise.middleware >>>>> >>>>> email: [email protected] 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/ >>>> >>> >>> >>> >>> -- >>> -- >>> Lahiru Sandaruwan >>> Software Engineer, >>> Platform Technologies, >>> WSO2 Inc., http://wso2.com >>> lean.enterprise.middleware >>> >>> email: [email protected] 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/ >> > > > > -- > -- > Lahiru Sandaruwan > Software Engineer, > Platform Technologies, > WSO2 Inc., http://wso2.com > lean.enterprise.middleware > > email: [email protected] 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/
