[jira] [Commented] (HIVE-21225) ACID: getAcidState() should cache a recursive dir listing locally

["Eugene Koifman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16763911#comment-16763911 ] 

Eugene Koifman commented on HIVE-21225:
---------------------------------------

perhaps an easier/better solution is to add another suffix to the base/delta dir name to indicate the "type" - i.e. acid or raw.  Then {{isRawFormat}} would just look at dir name.


> 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
>            Priority: Major
>
> 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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