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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3816) [Aggregation] App-level Aggregation for YARN system metrics
Date Tue, 15 Sep 2015 15:07:47 GMT

    [ https://issues.apache.org/jira/browse/YARN-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14745582#comment-14745582
] 

Varun Saxena commented on YARN-3816:
------------------------------------

# In TimelineMetric#accumulateTo, can latestMetric be TIME_SERIES ? If not(seems to be the
case as per current code), is the else part of the condition if (latestMetric.getType().equals(Type.SINGLE_VALUE))
{ required ?
# Wont be handling TIME_SERIES then ?
# One of the aggregateMetrics method in TimelineCollector is not required if you do not plan
to use it elsewhere. Agree with Naga that a set should suffice here.
# Default value can be mentioned explicity for yarn.timeline-service.aggregation.accumulation.enabled
in config file.
# REST API code can be removed I guess if not required for POC. 

BTW, the aggregate flag appended into column qualifer will be used by offline aggregator ?

> [Aggregation] App-level Aggregation 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: Junping Du
>         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-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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