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https://issues.apache.org/jira/browse/BEAM-3042?focusedWorklogId=89201&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-89201
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ASF GitHub Bot logged work on BEAM-3042:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 10/Apr/18 00:18
            Start Date: 10/Apr/18 00:18
    Worklog Time Spent: 10m 
      Work Description: pabloem opened a new pull request #5075: [BEAM-3042] 
Refactor of TransformIOCounters (performance, inheritance). Time counter for 
sideinputs.
URL: https://github.com/apache/beam/pull/5075
 
 
   Improving parent class behavior for `TransformIOCounter`, and avoiding 
recreating new objects when the step has not changed.
   
   Also, adding time tracking for side inputs, masked behind an experiment 
flag. This experiment flag is activated in internal dataflow tests, and bytes 
tracking has not affected performance in benchmarks, so we'd like to test 
adding time tracking.

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 89201)
    Time Spent: 50m  (was: 40m)

> Add tracking of bytes read / time spent when reading side inputs
> ----------------------------------------------------------------
>
>                 Key: BEAM-3042
>                 URL: https://issues.apache.org/jira/browse/BEAM-3042
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Pablo Estrada
>            Assignee: Pablo Estrada
>            Priority: Major
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> It is difficult for Dataflow users to understand how modifying a pipeline or 
> data set can affect how much inter-transform IO is used in their job. The 
> intent of this feature request is to help users understand how side inputs 
> behave when they are consumed.
> This will allow users to understand how much time and how much data their 
> pipeline uses to read/write to inter-transform IO. Users will also be able to 
> modify their pipelines and understand how their changes affect these IO 
> metrics.
> For further information, please review the internal Google doc 
> go/insights-transform-io-design-doc.



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