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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3841) [Storage implementation] Create HDFS backing storage implementation for ATS writes
Date Wed, 01 Jul 2015 16:41:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-3841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14610614#comment-14610614
] 

Hadoop QA commented on YARN-3841:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  0s | The patch command could not apply the patch during
dryrun. |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12743115/YARN-3841.001.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 2ac87df |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/8408/console |


This message was automatically generated.

> [Storage implementation] Create HDFS backing storage implementation for ATS writes
> ----------------------------------------------------------------------------------
>
>                 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
>         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
storage
> could potentially use the HDFS writer plugin unless the complexity of generalizing the
HDFS
> writer plugin for this purpose exceeds the benefits of reusing it here.
> {quote}



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