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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15691) Add PathCapabilities to FS and FC to complement StreamCapabilities
Date Mon, 03 Dec 2018 21:31:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16707821#comment-16707821
] 

Hadoop QA commented on HADOOP-15691:
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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}
HADOOP-15691 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 | HADOOP-15691 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12940787/HADOOP-15691-003.patch
|
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/15600/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


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> Add PathCapabilities to FS and FC to complement StreamCapabilities
> ------------------------------------------------------------------
>
>                 Key: HADOOP-15691
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15691
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>         Attachments: HADOOP-15691-001.patch, HADOOP-15691-002.patch, HADOOP-15691-003.patch
>
>
> Add a {{PathCapabilities}} interface to both FileSystem and FileContext to declare the
capabilities under the path of an FS
> This is needed for 
> * HADOOP-14707: declare that a dest FS supports permissions
> * object stores to declare that they offer PUT-in-place alongside (slow-rename)
> * Anything else where the implementation semantics of an FS is so different caller apps
would benefit from probing for the underlying semantics
> I know, we want all filesystem to work *exactly* the same. But it doesn't hold, especially
for object stores —and to efficiently use them, callers need to be able to ask for specific
features.



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