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Hadoop QA commented on YARN-3841: --------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s {color} | {color:blue} Docker mode activated. {color} | | {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s {color} | {color:red} YARN-3841 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} | \\ \\ || Subsystem || Report/Notes || | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12743115/YARN-3841.001.patch | | JIRA Issue | YARN-3841 | | Console output | https://builds.apache.org/job/PreCommit-YARN-Build/12274/console | | Powered by | Apache Yetus 0.3.0 http://yetus.apache.org | This message was automatically generated. > [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 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} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org