Li Lu commented on YARN-3816:

Created YARN-5747 for a fix on the aggregation problem. This fix should be 
target to trunk. Linking the two issues. 

> [Aggregation] App-level aggregation and accumulation for YARN system metrics
> ----------------------------------------------------------------------------
>                 Key: YARN-3816
>                 URL: https://issues.apache.org/jira/browse/YARN-3816
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Junping Du
>            Assignee: Li Lu
>              Labels: yarn-2928-1st-milestone
>             Fix For: 3.0.0-alpha1
>         Attachments: Application Level Aggregation of Timeline Data.pdf, 
> YARN-3816-YARN-2928-v1.patch, YARN-3816-YARN-2928-v2.1.patch, 
> YARN-3816-YARN-2928-v2.2.patch, YARN-3816-YARN-2928-v2.3.patch, 
> YARN-3816-YARN-2928-v2.patch, YARN-3816-YARN-2928-v3.1.patch, 
> YARN-3816-YARN-2928-v3.patch, YARN-3816-YARN-2928-v4.patch, 
> YARN-3816-YARN-2928-v5.patch, YARN-3816-YARN-2928-v6.patch, 
> YARN-3816-YARN-2928-v7.patch, YARN-3816-YARN-2928-v8.patch, 
> YARN-3816-YARN-2928-v9.patch, YARN-3816-feature-YARN-2928.v4.1.patch, 
> YARN-3816-poc-v1.patch, YARN-3816-poc-v2.patch
> We need application level aggregation of Timeline data:
> - To present end user aggregated states for each application, include: 
> resource (CPU, Memory) consumption across all containers, number of 
> containers launched/completed/failed, etc. We need this for apps while they 
> are running as well as when they are done.
> - Also, framework specific metrics, e.g. HDFS_BYTES_READ, should be 
> aggregated to show details of states in framework level.
> - Other level (Flow/User/Queue) aggregation can be more efficient to be based 
> on Application-level aggregations rather than raw entity-level data as much 
> less raws need to scan (with filter out non-aggregated entities, like: 
> events, configurations, etc.).

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