+1
On Oct 20, 2013, at 11:50 AM, Nirmal Fernando <[email protected]> wrote: > > > > On Sun, Oct 20, 2013 at 11:51 PM, Sanjiva Weerawarana <[email protected]> > wrote: > Awesome! > > We'll have to be very careful about the memory usage of the stat collectors .. > > +1. I'm already on it. So far it behaves nicely with load. > > <Screenshot from 2013-10-21 00:18:57.png> > I remember that in previous occasions those beasts ended up being trouble > makers. > > Sanjiva. > > > 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"}} > > {"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/ > > > > -- > Sanjiva Weerawarana, Ph.D. > Founder, Chairman & CEO; WSO2, Inc.; http://wso2.com/ > email: [email protected]; phone: +94 11 763 9614; cell: +94 77 787 6880 | +1 > 650 265 8311 > blog: http://sanjiva.weerawarana.org/ > > Lean . Enterprise . Middleware > > > > -- > Best Regards, > Nirmal > > Nirmal Fernando. > PPMC Member & Committer of Apache Stratos, > Senior Software Engineer, WSO2 Inc. > > Blog: http://nirmalfdo.blogspot.com/
