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https://issues.apache.org/jira/browse/HIVE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16778979#comment-16778979
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Ashutosh Chauhan commented on HIVE-21225:
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[~vgumashta] Which approach you are thinking here? [~ekoifman]'s of encoding
identifier in file names or [~gopalv]'s single recursive call.
If we change names of dirs not sure if that will have any impact on data in
existing tables.
> 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: 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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