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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2193) Re-architect Update Handler
Date Thu, 07 Apr 2011 15:26:05 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016875#comment-13016875
] 

Michael McCandless commented on SOLR-2193:
------------------------------------------

Fabulous!!  Elimination of the IW.close() on Solr's commit, and using Lucene's NRT!!

> Re-architect Update Handler
> ---------------------------
>
>                 Key: SOLR-2193
>                 URL: https://issues.apache.org/jira/browse/SOLR-2193
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>             Fix For: 4.0
>
>         Attachments: SOLR-2193.patch
>
>
> The update handler needs an overhaul.
> A few goals I think we might want to look at:
> 1. Cleanup - drop DirectUpdateHandler(2) line - move to something like UpdateHandler,
DefaultUpdateHandler
> 2. Expose the SolrIndexWriter in the api or add the proper abstractions to get done what
we now do with special casing:
> if (directupdatehandler2)
>   success
>  else
>   failish
> 3. Stop closing the IndexWriter and start using commit (still lazy IW init though).
> 4. Drop iwAccess, iwCommit locks and sync mostly at the Lucene level.
> 5. Keep NRT support in mind.
> 6. Keep microsharding in mind (maintain logical index as multiple physical indexes)

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