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From "Joep Rottinghuis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3841) [Storage implementation] Adding retry semantics to HDFS backing storage
Date Mon, 11 Jul 2016 17:49:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-3841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371276#comment-15371276

Joep Rottinghuis commented on YARN-3841:

[~ozawa] we have closed the work on the alpha-1 branch (which [~sjlee0] merged to trunk over
the weekend).
We'll continue our work on YARN-5355. I've moved this jira over.
Patches for this jira will be named YARN-3841-YARN-5355.02.patch

> [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: Tsuyoshi Ozawa
>              Labels: YARN-5355
>         Attachments: YARN-3841.001.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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