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https://issues.apache.org/jira/browse/HIVE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16884602#comment-16884602
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Vaibhav Gumashta edited comment on HIVE-21225 at 7/14/19 7:53 AM:
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Looks like the export import integration with mm-tables also creates a weird
dir structure like:
{{mm_table_import/delta_0000001_0000001_0000/export_old_delta_0000001_0000001_0000/000000_0}}
...
[~gopalv] In this case, the original assumption of not needing a linked
structure for capturing a recursive dir listing breaks.
was (Author: vgumashta):
Looks like the export import integration with mm-tables also creates a weird
dir structure like:
{{mm_table_import/delta_0000001_0000001_0000/export_old_delta_0000001_0000001_0000/000000_0}}
...
[~gopalv] In this case, the original assumption of not needing a tree like
structure for capturing a recursive dir listing breaks.
> ACID: getAcidState() should cache a recursive dir listing locally
> -----------------------------------------------------------------
>
> Key: HIVE-21225
> URL: https://issues.apache.org/jira/browse/HIVE-21225
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Reporter: Gopal V
> Assignee: Vaibhav Gumashta
> Priority: Major
> Attachments: HIVE-21225.1.patch, HIVE-21225.2.patch,
> HIVE-21225.3.patch, HIVE-21225.4.patch, HIVE-21225.4.patch,
> HIVE-21225.5.patch, HIVE-21225.6.patch, HIVE-21225.7.patch,
> HIVE-21225.7.patch, HIVE-21225.8.patch, HIVE-21225.9.patch, async-pid-44-2.svg
>
>
> Currently getAcidState() makes 3 calls into the FS api which could be
> answered by making a single recursive listDir call and reusing the same data
> to check for isRawFormat() and isValidBase().
> All delta operations for a single partition can go against a single listed
> directory snapshot instead of interacting with the NameNode or ObjectStore
> within the inner loop.
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