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https://issues.apache.org/jira/browse/HADOOP-13931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Mingliang Liu updated HADOOP-13931:
-----------------------------------
    Attachment: HADOOP-13931-HADOOP-13345.001.patch

The patch is based on [HADOOP-13934] V5 patch. After that one is committed, we 
can get this one in.

Test in US-West-1 region:
{code}
$ mvn -Dtest=none -Dit.test='ITestS3A*' -q clean verify
Results :

Tests in error:
  ITestS3AAWSCredentialsProvider.testAnonymousProvider:133 » IO Failed to 
instan...
  ITestS3ACredentialsInURL.testInstantiateFromURL:86 » IO Failed to instantiate 
...
  ITestS3ACredentialsInURL.testInvalidCredentialsFail:127 » AccessDenied 
s3a://m...
  
ITestS3AFileSystemContract>FileSystemContractBaseTest.testRenameToDirWithSamePrefixAllowed:669->FileSystemContractBaseTest.rename:525
 » AWSServiceIO

Tests run: 321, Failures: 0, Errors: 4, Skipped: 43
{code}

> S3AGuard: Use BatchWriteItem in DynamoDBMetadataStore#put()
> -----------------------------------------------------------
>
>                 Key: HADOOP-13931
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13931
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Rajesh Balamohan
>            Assignee: Mingliang Liu
>            Priority: Minor
>         Attachments: HADOOP-13931-HADOOP-13345.000.patch, 
> HADOOP-13931-HADOOP-13345.001.patch
>
>
> Using {{batchWriteItem}} might be performant in 
> {{DynamoDBMetadataStore#put(DirListingMetadata meta)}} and  
> {{DynamoDBMetadataStore#put(PathMetadata meta)}}.



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