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From "Dhruv Mahajan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (REEF-1456) Develop distributed counters framework in REEF
Date Fri, 24 Jun 2016 01:48:16 GMT

    [ https://issues.apache.org/jira/browse/REEF-1456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15347544#comment-15347544
] 

Dhruv Mahajan commented on REEF-1456:
-------------------------------------

So {[Server}} needs to accumulate values from all the evaluators and sequentially apply {{Increment}}
in any order. But this can be done internally in {{Server}} and as an output probably simply
{{Tuple<string name,string value}} are sufficient to expose? I had a brief look at the
metrics2 APIs that [~anupam128] referred to. We can actually use some of them (Of course after
required syntax change).

> Develop distributed counters framework in REEF
> ----------------------------------------------
>
>                 Key: REEF-1456
>                 URL: https://issues.apache.org/jira/browse/REEF-1456
>             Project: REEF
>          Issue Type: Sub-task
>          Components: REEF.NET
>         Environment: C#
>            Reporter: Dhruv Mahajan
>
> The aim of this JIRA is to develop distributed counters framework in REEF. Each task
can emit pairs of {counter name, incremental value} which are aggregated and sent to driver,
which can then aggregate them from all the tasks/ evaluators. The aggregation strategy can
be simple addition, most recently used, etc.  Via these counters, we can implement some common
metrics for ML - like amount (bytes) of data read, current loss function value etc.
> We will develop interfaces for Counters for evaluators and driver along with default
implementations and aggregation strategies.



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