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From "Otis Gospodnetic (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3816) Need a more granular nrt system that is close to a realtime system.
Date Wed, 07 Nov 2012 18:02:14 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492551#comment-13492551
] 

Otis Gospodnetic commented on SOLR-3816:
----------------------------------------

[~nnagarajayya] Hmmm.... maybe I'm missing something.... but if you set the soft commit in
Solr to something very, very low, then yes, while it is still technically point in time view,
that point in time is shifted so frequently that it looks like RT search to a human - new
results can show up with every new search.  So the effect can be as (N)RT as you choose with
the soft commit frequency.  I think the only Q is whether that approach vs. the approach in
your patch yields better performance, and it looks like [~hsn] will test that soon and we're
all anxiously waiting to see the 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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