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https://issues.apache.org/jira/browse/CARBONDATA-1896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhatchayani updated CARBONDATA-1896:
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Request participants: Kanaka Kumar Avvaru, Ravindra Pesala (was: Kanaka
Kumar Avvaru)
> Clean files operation improvement
> ---------------------------------
>
> Key: CARBONDATA-1896
> URL: https://issues.apache.org/jira/browse/CARBONDATA-1896
> Project: CarbonData
> Issue Type: Bug
> Reporter: dhatchayani
> Assignee: dhatchayani
>
> +*Problem:*+
> When bringing up the session, clean operation is handled in a way to mark all
> the INSERT_OVERWRITE_IN_PROGRESS or INSERT_IN_PROGRESS segments to
> MARKED_FOR_DELETE in tablestatus file. This clean operation is not
> considering the other parallel sessions. If any other session's data load is
> IN_PROGRESS at the time of bringing up one session, then the executing load
> also will be changed to MARKED_FOR_DELETE irrespective of the actual load
> status. Handling stale segments cleaning while session bring up also
> increases the time of bringing up a session.
> +*Solution:*+
> SEGMENT_LOCK should be taken on the new segment while loading.
> While cleaning segments tablestatus file and SEGMENT_LOCK should be
> considered.
> Cleaning stale files while bringing up the session should be removed and this
> should be manually done on the needed tables through already existing CLEAN
> FILES DDL.
> *Impact analysis on the solution will be updated soon.*
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