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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9565) Add a Blobstore interface to add to blobstore FileSystems
Date Fri, 20 Jun 2014 15:46:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14038930#comment-14038930
] 

Steve Loughran commented on HADOOP-9565:
----------------------------------------

Thomas: good points, I'll follow up in more detail. in HDFS-9361 I have tried to specify how
HDFS behaves, including what is explicity atomic. 
 -what is harder is knowing how applications expect HDFS to behave...

> Add a Blobstore interface to add to blobstore FileSystems
> ---------------------------------------------------------
>
>                 Key: HADOOP-9565
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9565
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs
>    Affects Versions: 2.0.4-alpha
>            Reporter: Steve Loughran
>            Priority: Minor
>
> We can make the fact that some {{FileSystem}} implementations are really blobstores,
with different atomicity and consistency guarantees, by adding a {{Blobstore}} interface to
add to them. 
> This could also be a place to add a {{Copy(Path,Path)}} method, assuming that all blobstores
implement at server-side copy operation as a substitute for rename.



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