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https://issues.apache.org/jira/browse/HADOOP-13650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15804365#comment-15804365
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Lei (Eddy) Xu commented on HADOOP-13650:
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bq. DDB table region is always the s3 bucket region for simplicity.
Yes, I agree this.
bq. The general usage pattern is to specify the fs.defaultFS as s3://mybucket
alike:
I was thinking the use cases such as using Hadoop to run ETL , which takes S3
as input and output locations, as what AWS EMR does. In such case, the
computing cluster (i.e., Hadoop / Hive / Spark) here should set
{{fs.defaultFS}} to the NameNode, because ETL pipelines use this HDFS cluster
instead of S3 to store intermediate data.
In the current {{DynamoDBMetadataStore#initialize(Configuration)}}, such case
will raise {{Exception}} if we do not explicitly specify s3a URI in the CLI
because it can not create {{S3AFileSystem}}.
bq. we rely on the endpoint for determining the DDB region.
I am fine with that.
> 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
>
>
> 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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