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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (HDDS-1017) Use distributed tracing to indentify performance problems in Ozone
Date Mon, 11 Feb 2019 11:31:00 GMT

     [ https://issues.apache.org/jira/browse/HDDS-1017?focusedWorklogId=196894&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-196894
]

ASF GitHub Bot logged work on HDDS-1017:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 11/Feb/19 11:30
            Start Date: 11/Feb/19 11:30
    Worklog Time Spent: 10m 
      Work Description: elek commented on pull request #472: HDDS-1017. Use distributed tracing
the indentify performance problems in Ozone.
URL: https://github.com/apache/hadoop/pull/472
 
 
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 196894)
    Time Spent: 20m  (was: 10m)

> Use distributed tracing to indentify performance problems in Ozone
> ------------------------------------------------------------------
>
>                 Key: HDDS-1017
>                 URL: https://issues.apache.org/jira/browse/HDDS-1017
>             Project: Hadoop Distributed Data Store
>          Issue Type: Improvement
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HDDS-1017.001.patch, HDDS-1017.002.patch, HDDS-1017.003.patch, HDDS-1017.004.patch,
HDDS-1017.005.patch, HDDS-1017.006.patch, HDDS-1017.007.patch
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> In the recent months multiple performance issues are resolved in OM/SCM and datanode
sides. To identify the remaining problems a distributed tracing framework would help a lot.
> In HADOOP-15566 there is an ongoing discussion to remove the discontinued HTrace and
use something else instead. Until now without any conclusion, but
>  1). There is one existing poc in the jira which uses opentracing
>  2). It was suggested to "evaluating all the options" before a final decision 
> As an evaluation step we would like to investigate the performance of ozone components
with opentracing. This patch can help us to find the performance problem but can be reverted
when we will have a final solution in HADOOP-15566 about the common tracing library.
> To make it lightweight we can use the ozone message level tracing identifier for context
propagation instead of modifying the existing hadoop rpc framework. 



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