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From "Ewan Higgs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13786) Add S3Guard committer for zero-rename commits to S3 endpoints
Date Mon, 16 Oct 2017 14:47:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206010#comment-16206010
] 

Ewan Higgs commented on HADOOP-13786:
-------------------------------------

{quote}I should add that AFAIK Ewan has been testing the "magic" committer, not the staging
ones; his store is naturally consistent.{quote} 
Yes.

{quote}What I'd like to suggest here is we create a branch for the S3Guard phase II work (HADOOP-14825),
make this the first commit & then work on the s3guard II improvements above it. {quote}
+1

> Add S3Guard committer for zero-rename commits to S3 endpoints
> -------------------------------------------------------------
>
>                 Key: HADOOP-13786
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13786
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/s3
>    Affects Versions: 3.0.0-beta1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-13786-036.patch, HADOOP-13786-037.patch, HADOOP-13786-038.patch,
HADOOP-13786-039.patch, HADOOP-13786-HADOOP-13345-001.patch, HADOOP-13786-HADOOP-13345-002.patch,
HADOOP-13786-HADOOP-13345-003.patch, HADOOP-13786-HADOOP-13345-004.patch, HADOOP-13786-HADOOP-13345-005.patch,
HADOOP-13786-HADOOP-13345-006.patch, HADOOP-13786-HADOOP-13345-006.patch, HADOOP-13786-HADOOP-13345-007.patch,
HADOOP-13786-HADOOP-13345-009.patch, HADOOP-13786-HADOOP-13345-010.patch, HADOOP-13786-HADOOP-13345-011.patch,
HADOOP-13786-HADOOP-13345-012.patch, HADOOP-13786-HADOOP-13345-013.patch, HADOOP-13786-HADOOP-13345-015.patch,
HADOOP-13786-HADOOP-13345-016.patch, HADOOP-13786-HADOOP-13345-017.patch, HADOOP-13786-HADOOP-13345-018.patch,
HADOOP-13786-HADOOP-13345-019.patch, HADOOP-13786-HADOOP-13345-020.patch, HADOOP-13786-HADOOP-13345-021.patch,
HADOOP-13786-HADOOP-13345-022.patch, HADOOP-13786-HADOOP-13345-023.patch, HADOOP-13786-HADOOP-13345-024.patch,
HADOOP-13786-HADOOP-13345-025.patch, HADOOP-13786-HADOOP-13345-026.patch, HADOOP-13786-HADOOP-13345-027.patch,
HADOOP-13786-HADOOP-13345-028.patch, HADOOP-13786-HADOOP-13345-028.patch, HADOOP-13786-HADOOP-13345-029.patch,
HADOOP-13786-HADOOP-13345-030.patch, HADOOP-13786-HADOOP-13345-031.patch, HADOOP-13786-HADOOP-13345-032.patch,
HADOOP-13786-HADOOP-13345-033.patch, HADOOP-13786-HADOOP-13345-035.patch, cloud-intergration-test-failure.log,
objectstore.pdf, s3committer-master.zip
>
>
> A goal of this code is "support O(1) commits to S3 repositories in the presence of failures".
Implement it, including whatever is needed to demonstrate the correctness of the algorithm.
(that is, assuming that s3guard provides a consistent view of the presence/absence of blobs,
show that we can commit directly).
> I consider ourselves free to expose the blobstore-ness of the s3 output streams (ie.
not visible until the close()), if we need to use that to allow us to abort commit operations.



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