Thanks for your response Nirmal, please see my thoughts below: On Thu, Nov 6, 2014 at 7:38 PM, Nirmal Fernando <nirmal070...@gmail.com> wrote:
> AFAIU if it is statistics, it's all about random data, samples and > normalization. You don't use all values to do estimations. And this is an > estimation for gradient per say! > True, however the random data needs to be accurate as much as possible. > >> Well, statistics we are calculating is for a cluster as a whole not > member wise. Since, we autoscale a cluster. > Yes for autoscaling a cluster the aggregated statistics should be calculated against the cluster. However I do not think that we can mix each statistic accorss members when calculating differences. Different members of a cluster might be running at different resource usage levels at a given point of time. Therefore aggregation might needed to be done at the member level first and then on the cluster level. WDYT? -- Imesh Gunaratne Technical Lead, WSO2 Committer & PMC Member, Apache Stratos
