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https://issues.apache.org/jira/browse/CARBONDATA-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacky Li resolved CARBONDATA-2494.
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Resolution: Fixed
Fix Version/s: 1.4.0
> Improve Lucene datamap size and performnace.
> --------------------------------------------
>
> Key: CARBONDATA-2494
> URL: https://issues.apache.org/jira/browse/CARBONDATA-2494
> Project: CarbonData
> Issue Type: Improvement
> Reporter: Ravindra Pesala
> Priority: Major
> Fix For: 1.4.0
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> Improved lucene datamap size and performance by using the following
> parameters.
> New DM properties
> `flush_cache`: size of the cache to maintain in Lucene writer, if specified
> then it tries to aggregate the unique data till the cache limit and flush to
> Lucene. It is best suitable for low cardinality dimensions.
> `split_blocklet`: when made as true then store the data in blocklet wise in
> lucene , it means new folder will be created for each blocklet thus it
> eliminates storing on blockletid in lucene. And also it makes lucene small
> chunks of data.
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