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https://issues.apache.org/jira/browse/KYLIN-2722?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhong Yanghong updated KYLIN-2722:
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    Description: 
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*.

  was:For many existing metrics frameworks, they focus on maintaining metrics 
in memory. 


> 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
>    Affects Versions: v2.0.0
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>         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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