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From "Shizhen Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (REEF-1456) Develop distributed counters framework in REEF
Date Fri, 17 Jun 2016 07:30:05 GMT

    [ https://issues.apache.org/jira/browse/REEF-1456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335590#comment-15335590
] 

Shizhen Wang commented on REEF-1456:
------------------------------------

Can the counters framework be used to report job progress? It seems work for iterative algorithms,
which approximates progress as current_iteration / total_iteration. How about non-iterative
ones?

> 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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