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https://issues.apache.org/jira/browse/HDFS-11942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17081504#comment-17081504
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Hadoop QA commented on HDFS-11942:
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| (x) *{color:red}-1 overall{color}* |
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|| 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 8s{color}
| {color:red} HDFS-11942 does not apply to trunk. Rebase required? Wrong
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-11942 |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/29129/console |
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> make new chooseDataNode policy work in more operation like seek, fetch
> ------------------------------------------------------------------------
>
> Key: HDFS-11942
> URL: https://issues.apache.org/jira/browse/HDFS-11942
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Affects Versions: 2.6.0, 2.7.0, 3.0.0-alpha3
> Reporter: Fangyuan Deng
> Priority: Major
> Attachments: HDFS-11942.0.patch, HDFS-11942.1.patch,
> ssd-first-disable(default).png, ssd-first-enable.png
>
>
> in default policy, if a file is ONE_SSD, client will prior read the local
> disk replica rather than the remote ssd replica.
> but now, the pci-e SSD and 10G ethernet make remote read SSD more faster than
> the local disk.
> HDFS-9666 give us a patch, but the code is not complete and not updated for
> a long time.
> this sub-task issue give a complete patch and
> we have tested on three machines [ 32 core cpu, 128G mem , 1000M network,
> 1.2T HDD, 800G SSD(intel P3600) ].
> with this feather, throughput of hbase table(ONE_SSD) is double of which
> without this feather
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