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From "Nagendra Nagarajayya (JIRA)" <>
Subject [jira] [Commented] (SOLR-3816) Need a more granular nrt system that is close to a realtime system.
Date Wed, 07 Nov 2012 16:11:16 GMT


Nagendra Nagarajayya commented on SOLR-3816:


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:
>             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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