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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5312) Parameter 'size' in the webservices "/containerlogs/$containerid/$filename" and in AHSWebServices is semantically confusing
Date Wed, 27 Jul 2016 02:40:20 GMT

     [ https://issues.apache.org/jira/browse/YARN-5312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli updated YARN-5312:
------------------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: YARN-4904

> Parameter 'size' in the webservices "/containerlogs/$containerid/$filename" and in AHSWebServices
is semantically confusing
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5312
>                 URL: https://issues.apache.org/jira/browse/YARN-5312
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>
> This got added in YARN-5088 and I found this while reviewing YARN-5224.
> bq. Also, the parameter 'size' in the API "/containerlogs/$containerid/$filename" and
similarly in AHSWebServices is confusing with semantics. I think we are better off with an
offset and size.
> An offset (in bytes, +ve to indicate from the start and -ve to indicate from the end)
together with a size (in bytes) indicating how much to read from the offset are a better combination
- this is how most file-system APIs look like, for comparison.
> I can also imagine number of lines as a better unit than bytes for offset and size -
perhaps yet another ticket.
> /cc [~vvasudev].



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