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https://issues.apache.org/jira/browse/CARBONDATA-318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacky Li reassigned CARBONDATA-318:
-----------------------------------

    Assignee: Jacky Li

> Implement an ExternalSorter that makes maximum usage of memory while sorting
> ----------------------------------------------------------------------------
>
>                 Key: CARBONDATA-318
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-318
>             Project: CarbonData
>          Issue Type: Sub-task
>            Reporter: Jacky Li
>            Assignee: Jacky Li
>             Fix For: 0.2.0-incubating
>
>
> Change SortDataRows into an External Sorter, it should sort in memory until 
> it reach configured size, then spill to disk. It should provide following 
> interface:
> 1. addRow:  insert rows into the sorter.
> 2. getIterator: will return an iterator that iterates on sorted rows, the 
> sorted row could come from memory or files



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