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https://issues.apache.org/jira/browse/HADOOP-14154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16562579#comment-16562579
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Gabor Bota edited comment on HADOOP-14154 at 7/30/18 10:05 PM:
---------------------------------------------------------------
Uploaded patch v001 for this issue.
* I had to fix {{MetadataStoreTestBase#testPruneUnsetsAuthoritative}} because
it did not test anything. (had to add a dir which is authoritative, but a child
element gets removed so the parent dir loses the flag)
* I've added {{testPrunePreservesAuthoritative}} to test that the authoritative
flag is preserved when no child elements pruned from the dir.
* Added {{PathMetadata#isAuthoritativeDir}} because {{DynamoDBMetadataStore}}
stores {{PathMetadata}} in ddb, so that was a logical choice.
* This is not the final patch I'd like to be committed - the final patch should
also include .md docs about this change.
Big thanks to [~fabbri] for the continuous help, and for the original idea on
how to solve this issue.
was (Author: gabor.bota):
Uploaded patch v001 for this issue.
* I had to fix {{MetadataStoreTestBase#testPruneUnsetsAuthoritative}} because
it did not test anything. (had to add a dir which is authoritative, but a child
element gets removed so the parent dir loses the flag)
* I've added {{testPrunePreservesAuthoritative}} to test that the authoritative
flag is preserved when no child elements pruned from the dir.
* Added {{PathMetadata#isAuthoritativeDir}} because {{DynamoDBMetadataStore}}
stores {{PathMetadata}} in ddb, so that was a logical choice.
Big thanks to [~fabbri] for the continuous help, and for the original idea on
how to solve this issue.
> Persist isAuthoritative bit in DynamoDBMetaStore (authoritative mode support)
> -----------------------------------------------------------------------------
>
> Key: HADOOP-14154
> URL: https://issues.apache.org/jira/browse/HADOOP-14154
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.0.0-beta1
> Reporter: Rajesh Balamohan
> Assignee: Gabor Bota
> Priority: Minor
> Attachments: HADOOP-14154-HADOOP-13345.001.patch,
> HADOOP-14154-HADOOP-13345.002.patch, HADOOP-14154-spec-001.pdf,
> HADOOP-14154-spec-002.pdf, HADOOP-14154.001.patch
>
>
> Add support for "authoritative mode" for DynamoDBMetadataStore.
> The missing feature is to persist the bit set in
> {{DirListingMetadata.isAuthoritative}}.
> This topic has been super confusing for folks so I will also file a
> documentation Jira to explain the design better.
> We may want to also rename the DirListingMetadata.isAuthoritative field to
> .isFullListing to eliminate the multiple uses and meanings of the word
> "authoritative".
>
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