Zhong Yanghong reassigned KYLIN-2722:

    Assignee: Wang Ken  (was: Zhong Yanghong)

> Introduce a new measure, called active reservoir, for actively pushing 
> metrics to reporters
> -------------------------------------------------------------------------------------------
>                 Key: KYLIN-2722
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2722
>             Project: Kylin
>          Issue Type: Sub-task
>            Reporter: Zhong Yanghong
>            Assignee: Wang Ken
>            Priority: Major
>             Fix For: v2.3.0
>         Attachments: APACHE-KYLIN-2722.patch
> For many existing metrics frameworks, they focus on maintaining metrics in 
> memory independently for each instance. However, kylin server may consist of 
> multiple instances. Thus we extend existing metrics framework by introducing 
> *active reservoir* to actively push metrics to reporters which will report 
> metrics of its instance to a unified storage. 
> Here we introduced two *active reservoirs*. One is called 
> {{BlockingReservoir}}, which will buffer the metrics. The other is called 
> {{InstantReservoir}}, which owns no buffer and will directly push metrics to 
> reporters.
> Generally, one *active reservoir* can push its metrics to multiple reporters 
> and one reporter can only listen on one *active reservoir*.

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