[Hawkular-dev] Hawkular Metrics - Roadmap

[John Sanda]

> On Mar 16, 2016, at 4:03 AM, Heiko W.Rupp <hrupp at redhat.com> wrote:
> 
> Hey Stefan,
> 
> On 15 Mar 2016, at 21:00, Stefan Negrea wrote:
> 
>>  * Add support for metrics baselines; automatically computed 
>> server-side and stored
> 
> How? What is the algorithm behind? Please remember that the
> algorithm from RHQ is/was flawed.

The algorithm was indeed flawed, but I think the feature could be a big one. For those not familiar, in RHQ we used averages. http://apmblog.dynatrace.com/2012/11/14/why-averages-suck-and-percentiles-are-great/ <http://apmblog.dynatrace.com/2012/11/14/why-averages-suck-and-percentiles-are-great/> is a nice article that explains why using averages is not good. I think that adding support for a histogram metric type that is calculated on the server gets a lot of what we need.

> 
>> 7) ElasticSearch integration
>>  * An optional integration with Elastic Search for tasks beyond the 
>> capability of Cassandra.
>>  * Basic examples for this are whole tenant searches and aggregation 
>> of text based data, such as tags, events, and even availability.
> 
> How do we deal with the data nodes of ES? Where do
> the events of  "aggregation of events" come from and
> are stored?
> What does "whole tenant searches" mean?
> 
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