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https://issues.apache.org/jira/browse/HIVE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17038066#comment-17038066
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Gopal Vijayaraghavan commented on HIVE-21225:
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bq. I have reopened the issue as I couldn't attach new files
Since this is a task ticket titled "cache file listing" and the fix is to do
exactly that, this shouldn't be reopened. If we have a performance issue from
this patch, that should be a different issue - it is too late to layer on an
addendum to this.
Also
bq. I'm not using S3guard which might have resulted in a significant amount of
time for S3 calls.
ACID doesn't work without S3guard on S3 - compactions will break the world for
you.
> 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 Vijayaraghavan
> Assignee: Vaibhav Gumashta
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-21225.1.patch, HIVE-21225.10.patch,
> HIVE-21225.11.patch, HIVE-21225.12.patch, HIVE-21225.13.patch,
> HIVE-21225.14.patch, HIVE-21225.15.patch, HIVE-21225.15.patch,
> HIVE-21225.16.patch, HIVE-21225.17.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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