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https://issues.apache.org/jira/browse/SOLR-2193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924427#action_12924427
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Mark Miller commented on SOLR-2193:
-----------------------------------
I've been playing with a patch the keeps the IndexWriter open always (shares
them across core reloads) and drops our internal update locks - so far, all
tests pass, but there are still issues to deal with.
I'll post the patch once I work a few more things out. Won't cover everything -
just a start to explore different ideas.
> Re-architect Update Handler
> ---------------------------
>
> Key: SOLR-2193
> URL: https://issues.apache.org/jira/browse/SOLR-2193
> Project: Solr
> Issue Type: Improvement
> Reporter: Mark Miller
> Fix For: Next
>
>
> 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 know do with special casing:
> if (directupdatehandler2)
> success
> else
> failish
> 3. Stop closing the IndexWriter and start using commit.
> 4. Drop iwAccess, iwCommit locks and sync mostly at the Lucene level.
> 5. Keep NRT support in mind.
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