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https://issues.apache.org/jira/browse/HIVE-17710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282402#comment-16282402
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Eugene Koifman commented on HIVE-17710:
---------------------------------------
Perhaps LM should only lock TableType.MANAGED_TABLE. Not clear it makes sense
for any other type
{noformat}
public enum TableType {
MANAGED_TABLE, EXTERNAL_TABLE, VIRTUAL_VIEW, INDEX_TABLE, MATERIALIZED_VIEW
}
{noformat}
> LockManager and External tables
> -------------------------------
>
> Key: HIVE-17710
> URL: https://issues.apache.org/jira/browse/HIVE-17710
> Project: Hive
> Issue Type: New Feature
> Components: Transactions
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
>
> should the LM take locks on External tables? Out of the box Acid LM is being
> conservative which can cause throughput issues.
> A better strategy may be to exclude External tables but enable explicit "lock
> table/partition <lock mode>" command (only on external tables?).
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