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https://issues.apache.org/jira/browse/CARBONDATA-4107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Indhumathi Muthu Murugesh updated CARBONDATA-4107:
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Description:
# After MV support multi-tenancy PR, mv system folder is moved to database
level. Hence, during each operation, insert/Load/IUD/show mv/query, we are
listing all the databases in the system and collecting mv schemas and checking
if there is any mv mapped to the table or not. This will degrade performance of
the query, to collect mv schemas from all databases, even though the table has
mv or not.
# When different jvm process call touchMDTFile method, file creation and
deletion can happen same time. This may fail the operation.
> MV Performance and Lock issues
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>
> Key: CARBONDATA-4107
> URL: https://issues.apache.org/jira/browse/CARBONDATA-4107
> Project: CarbonData
> Issue Type: Bug
>Reporter: Indhumathi Muthu Murugesh
>Priority: Major
>
> # After MV support multi-tenancy PR, mv system folder is moved to database
> level. Hence, during each operation, insert/Load/IUD/show mv/query, we are
> listing all the databases in the system and collecting mv schemas and
> checking if there is any mv mapped to the table or not. This will degrade
> performance of the query, to collect mv schemas from all databases, even
> though the table has mv or not.
> # When different jvm process call touchMDTFile method, file creation and
> deletion can happen same time. This may fail the operation.
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