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From "Abhishek Modi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3841) [Storage implementation] Adding retry semantics to HDFS backing storage
Date Tue, 29 Jan 2019 17:51:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-3841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16755231#comment-16755231

Abhishek Modi commented on YARN-3841:

[~vrushalic] could you please review it. Thanks.

> [Storage implementation] Adding retry semantics to HDFS backing storage
> -----------------------------------------------------------------------
>                 Key: YARN-3841
>                 URL: https://issues.apache.org/jira/browse/YARN-3841
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Tsuyoshi Ozawa
>            Assignee: Abhishek Modi
>            Priority: Major
>              Labels: YARN-5355
>         Attachments: YARN-3841-YARN-7055.002.patch, YARN-3841.001.patch, YARN-3841.002.patch,
YARN-3841.003.patch, YARN-3841.004.patch, YARN-3841.005.patch, YARN-3841.006.patch, YARN-3841.007.patch,
YARN-3841.008.patch, YARN-3841.009.patch
> HDFS backing storage is useful for following scenarios.
> 1. For Hadoop clusters which don't run HBase.
> 2. For fallback from HBase when HBase cluster is temporary unavailable. Quoting ATS design
document of YARN-2928:
> {quote}
> In the case the HBase
> storage is not available, the plugin should buffer the writes temporarily (e.g. HDFS),
and flush
> them once the storage comes back online. Reading and writing to hdfs as the the backup
> could potentially use the HDFS writer plugin unless the complexity of generalizing the
> writer plugin for this purpose exceeds the benefits of reusing it here.
> {quote}

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