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https://issues.apache.org/jira/browse/SOLR-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486034#comment-13486034
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Radim Kolar commented on SOLR-3816:
-----------------------------------

patch should be against solr trunk. Solr 4.0 branch is for bugfixes only.
                
> Need a more granular nrt system that is close to a realtime system.
> -------------------------------------------------------------------
>
>                 Key: SOLR-3816
>                 URL: https://issues.apache.org/jira/browse/SOLR-3816
>             Project: Solr
>          Issue Type: Improvement
>          Components: clients - java, replication (java), search, 
> SearchComponents - other, SolrCloud, update
>    Affects Versions: 4.0
>            Reporter: Nagendra Nagarajayya
>              Labels: nrt, realtime, replication, search, solrcloud, update
>         Attachments: SOLR-3816_4.0_branch.patch, solr-3816-realtime_nrt.patch
>
>
> Need a more granular NRT system that is close to a realtime system. A 
> realtime system should be able to reflect changes to the index as and when 
> docs are added/updated to the index. soft-commit offers NRT and is more 
> realtime friendly than hard commit but is limited by the dependency on the 
> SolrIndexSearcher being closed and reopened and offers a coarse granular NRT. 
> Closing and reopening of the SolrIndexSearcher may impact performance also.

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