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https://issues.apache.org/jira/browse/SOLR-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492457#comment-13492457
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Nagendra Nagarajayya commented on SOLR-3816:
--------------------------------------------

@Otis:

Regarding the performance improvement, apart from the performance improvement, 
realtime-search makes available a realtime (nrt) view of the index as to 
current Solr implementation of point-in-time snapshots of the index. So each 
search may return new results ... 
                
> 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: alltests_passed_with_realtime_turnedoff.log, 
> SOLR-3816_4.0_branch.patch, SOLR-3816-4.x.trunk.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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