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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13650) S3Guard: Provide command line tools to manipulate metadata store.
Date Wed, 11 Jan 2017 07:28:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Lei (Eddy) Xu updated HADOOP-13650:
    Attachment: HADOOP-13650-HADOOP-13345.007.patch

Hi, [~stevel@apache.org]

Thanks for reviewing the patch.  I upload the patch to address your comments.

bq. S3GuardTool could just import Constants.*

bq. static private boolean exist(DynamoDB dynamoDB, String tableName) should be private static


bq. I think we should also have an fsck command which compares actual and declared, 

Could you help to clarify that what  the differences would be between {{s3a fsck}} and {{s3a
diff}} in your mind?  For example, would {{diff + destroy + import}} equals to {{fsck fix
up ddb}}, and adding a flag like {{s3a diff --fail-fast}} equals to {{fail with an exit code}}?

bq. that needs to be in this patch though, or a followon.

If the above differences are significant enough, I would like to file a follow on JIRA? What
would you think?

Also, ping [~cnauroth], [~liuml07] and [~fabbri] for reviews.


> S3Guard: Provide command line tools to manipulate metadata store.
> -----------------------------------------------------------------
>                 Key: HADOOP-13650
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13650
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HADOOP-13650-HADOOP-13345.000.patch, HADOOP-13650-HADOOP-13345.001.patch,
HADOOP-13650-HADOOP-13345.002.patch, HADOOP-13650-HADOOP-13345.003.patch, HADOOP-13650-HADOOP-13345.004.patch,
HADOOP-13650-HADOOP-13345.005.patch, HADOOP-13650-HADOOP-13345.006.patch, HADOOP-13650-HADOOP-13345.007.patch
> Similar systems like EMRFS has the CLI tools to manipulate the metadata store, i.e.,
create or delete metadata store, or {{import}}, {{sync}} the file metadata between metadata
store and S3. 
> http://docs.aws.amazon.com//ElasticMapReduce/latest/ReleaseGuide/emrfs-cli-reference.html
> S3Guard should offer similar functionality. 

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