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Otis Gospodnetic commented on SOLR-3816:
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Hmmmm... didn't check the sources now, but I'm not sure if the above is all correct. Lucene
gets the new Reader from IndexWriter, and I would think Solr uses that on soft commit and
not something else, big and heavy. Yes, there is Searcher/cache warming, but I'm not sure
if that comes into play any more with NRT and soft commits.
> 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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