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Date: Fri, 1 Oct 2010 18:27:35 -0400 (EDT)
From: "Jason Rutherglen (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2655) Get deletes working in the realtime
 branch
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    [ https://issues.apache.org/jira/browse/LUCENE-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12917076#action_12917076 ] 

Jason Rutherglen commented on LUCENE-2655:
------------------------------------------

Ok, I have been stuck/excited about not having to use/understand the remap-docids method, because it's hard to debug.  However I see what you're saying, and why remap-docids exists.  I'll push the DWP buffered deletes to the flushed deletes.  

bq. we'll pay huge cost opening that massive grandaddy segment 

This large cost is from loading the terms index and deleted docs?   When those large segments are merged though, the IO cost is so substantial that loading tii or del into RAM probably doesn't account for much of the aggregate IO, they're probably in the noise?  Or are you referring to the NRT apply deletes flush, however that is on a presumably pooled reader?  Or you're just saying that today we're applying deletes across the board to all segments prior to a merge, regardless of whether or not they're even involved in the merge?  It seems like that is changeable?

> Get deletes working in the realtime branch
> ------------------------------------------
>
>                 Key: LUCENE-2655
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2655
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>    Affects Versions: Realtime Branch
>            Reporter: Jason Rutherglen
>             Fix For: Realtime Branch
>
>         Attachments: LUCENE-2655.patch
>
>
> Deletes don't work anymore, a patch here will fix this.

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