Hi Lakmal, On Mon, Mar 9, 2015 at 12:20 PM, Lakmal Warusawithana <lak...@wso2.com> wrote: > > > On Mon, Mar 9, 2015 at 12:16 PM, Imesh Gunaratne <im...@apache.org> wrote: > >> Hi David, >> >> We might need to check why the load balancer is not sending statistics to >> CEP. Try to enable debug logs in the load balancer and run, it should trace >> the statistics sent to CEP. >> >> No AFAIK, it is not possible to configure Autoscaler to disregard load >> balancer statistics. I see this as a very valid requirement (to exclude any >> of the scaling factors), may be we can consider adding this to 4.1.0. Would >> you mind reporting this as a feature request? >> >> > I'm bit confuse here! I can scale up a cluster without having a LB. (in > 4.1.0) which mean LB is not a MUST right? >
Yes, scaling up would work but scaling down might not work if statistics for all the autoscaling factors are available: 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))) https://github.com/apache/stratos/blob/4.0.0/products/stratos/modules/distribution/src/main/conf/scaling.drl Thanks
