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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (SOLR-2193) Re-architect Update Handler
Date Wed, 01 Jun 2011 04:52:47 GMT


Robert Muir commented on SOLR-2193:

-1 on the implementation which introduces even more awkward layers into Solr, which should
be going in the direction of removing the old cruft.

Sorry Jason, you cannot simply say -1 without answering my questions about how these problems
can be solved in an alternative way. 

I hate to be an asshole, but your vote is non-binding. I'm going to take this issue to the
finish line now.

> Re-architect Update Handler
> ---------------------------
>                 Key: SOLR-2193
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Robert Muir
>             Fix For: 4.0
>         Attachments: SOLR-2193.patch, SOLR-2193.patch, SOLR-2193.patch, SOLR-2193.patch,
SOLR-2193.patch, 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,
> 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)
> 7. Address the current issues we face because multiple original/'reloaded' cores can
have a different IndexWriter on the same index.

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