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Posted to dev@lucene.apache.org by "Jason Rutherglen (JIRA)" <ji...@apache.org> on 2010/12/09 19:14:03 UTC
[jira] Commented: (LUCENE-2324) Per thread DocumentsWriters that
write their own private segments
[ https://issues.apache.org/jira/browse/LUCENE-2324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969836#action_12969836 ]
Jason Rutherglen commented on LUCENE-2324:
------------------------------------------
Now that LUCENE-2680 is implemented we can get deletes working properly in the
realtime, which is really the DWPT branch at this point. Given the significant
changes made since it's creation, rather than continue with a realtime branch,
I propose we patch into trunk the DWPT changes.
> Per thread DocumentsWriters that write their own private segments
> -----------------------------------------------------------------
>
> Key: LUCENE-2324
> URL: https://issues.apache.org/jira/browse/LUCENE-2324
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Michael Busch
> Assignee: Michael Busch
> Priority: Minor
> Fix For: Realtime Branch
>
> Attachments: lucene-2324.patch, lucene-2324.patch, LUCENE-2324.patch
>
>
> See LUCENE-2293 for motivation and more details.
> I'm copying here Mike's summary he posted on 2293:
> Change the approach for how we buffer in RAM to a more isolated
> approach, whereby IW has N fully independent RAM segments
> in-process and when a doc needs to be indexed it's added to one of
> them. Each segment would also write its own doc stores and
> "normal" segment merging (not the inefficient merge we now do on
> flush) would merge them. This should be a good simplification in
> the chain (eg maybe we can remove the *PerThread classes). The
> segments can flush independently, letting us make much better
> concurrent use of IO & CPU.
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