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/
