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https://issues.apache.org/jira/browse/HIVE-25277?focusedWorklogId=614614&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-614614
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ASF GitHub Bot logged work on HIVE-25277:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Jun/21 16:49
Start Date: 24/Jun/21 16:49
Worklog Time Spent: 10m
Work Description: coufon commented on a change in pull request #2421:
URL: https://github.com/apache/hive/pull/2421#discussion_r658120606
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HMSHandler.java
##########
@@ -5088,10 +5089,8 @@ private boolean isDatabaseRemote(String name) {
private void deleteParentRecursive(Path parent, int depth, boolean
mustPurge, boolean needRecycle)
Review comment:
I think it works if deleteDir fails when the dir is non-empty with no
side effect. But we need to make sure all filesystems that Hive supports work
in this way. Also I noticed that deleteDir calls moveToTrash first, so it could
be more complex:
https://github.com/apache/hive/blob/f2de30ca8bc2b63887496775f9a0769057a17ee0/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStoreFsImpl.java#L41.
Avoiding duplicated checks seems to be safer.
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Issue Time Tracking
-------------------
Worklog Id: (was: 614614)
Time Spent: 50m (was: 40m)
> Slow Hive partition deletion for Cloud object stores with expensive ListFiles
> -----------------------------------------------------------------------------
>
> Key: HIVE-25277
> URL: https://issues.apache.org/jira/browse/HIVE-25277
> Project: Hive
> Issue Type: Improvement
> Components: Standalone Metastore
> Affects Versions: All Versions
> Reporter: Zhou Fang
> Assignee: Zhou Fang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Deleting a Hive partition is slow when use a Cloud object store as the
> warehouse for which ListFiles is expensive. A root cause is that the
> recursive parent dir deletion is very inefficient: there are many duplicated
> calls to isEmpty (ListFiles is called at the end). This fix sorts the parents
> to delete according to the path size, and always processes the longest one
> (e.g., a/b/c is always before a/b). As a result, each parent path is only
> needed to be checked once.
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