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https://issues.apache.org/jira/browse/YARN-3841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16613236#comment-16613236
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Abhishek Modi commented on YARN-3841:
-------------------------------------
Thanks [~vrushalic] for review. Attached new patch with fixes for review
comments.
> [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
>
>
> 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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