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From "Jason Rutherglen (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (LUCENE-2324) Per thread DocumentsWriters that write their own private segments
Date Mon, 20 Sep 2010 02:53:34 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12912312#action_12912312
] 

Jason Rutherglen edited comment on LUCENE-2324 at 9/19/10 10:52 PM:
--------------------------------------------------------------------

Simon, on second thought, lets go ahead and factor out BytesHash, do you want to submit a
patch for the realtime branch and post it here or should I?

      was (Author: jasonrutherglen):
    Simon, on second thought, lets go ahead and factor out BytesHash, do you want to submit
a patch for the realtime patch and post it here or should I?
  
> 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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