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From "Aaron Fabbri (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13345) S3Guard: Improved Consistency for S3A
Date Thu, 05 Jan 2017 19:47:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15802338#comment-15802338
] 

Aaron Fabbri commented on HADOOP-13345:
---------------------------------------

Thanks [~stevel@apache.org], this is good stuff.  Sounds like you are adding (1) CLI polish
/ docs / fsck and (2) FS metrics to my list.

In terms of clean integration with S3A code:  I spent a lot of time streamlining the S3AFileSystem
integration.  One of the main warts IMO is the isEmptyDirectory thing, but refactoring that
post-merge seems much easier to me (and also isn't S3Guard specific per-se).  Anything else
actionable we can do to address the maintainability point?  Maybe we do another feature branch
code review with this in mind after we get the above features in?



> S3Guard: Improved Consistency for S3A
> -------------------------------------
>
>                 Key: HADOOP-13345
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13345
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/s3
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: HADOOP-13345.prototype1.patch, S3C-ConsistentListingonS3-Design.pdf,
S3GuardImprovedConsistencyforS3A.pdf, S3GuardImprovedConsistencyforS3AV2.pdf, s3c.001.patch
>
>
> This issue proposes S3Guard, a new feature of S3A, to provide an option for a stronger
consistency model than what is currently offered.  The solution coordinates with a strongly
consistent external store to resolve inconsistencies caused by the S3 eventual consistency
model.



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