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https://issues.apache.org/jira/browse/HDFS-10939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15537029#comment-15537029
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Hadoop QA commented on HDFS-10939:
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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  5s{color} 
| {color:red} HDFS-10939 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-10939 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12831165/HDFS-10939.patch |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/16952/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


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> Reduce performance penalty of encryption zones
> ----------------------------------------------
>
>                 Key: HDFS-10939
>                 URL: https://issues.apache.org/jira/browse/HDFS-10939
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>    Affects Versions: 2.7
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-10939.patch
>
>
> The encryption zone APIs should be optimized to extensively use IIPs to 
> eliminate path resolutions.  The performance penalties incurred by common 
> operations like creation of file statuses may be reduced by more extensive 
> short-circuiting of EZ lookups when no EZs exist.  All file creates should 
> not be subjected to the multi-stage locking performance penalty required only 
> for EDEK generation.



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