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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-1274) Expose explicit 2-phase commit in IndexWriter
Date Sun, 27 Apr 2008 20:34:55 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-1274:
---------------------------------------

    Attachment: LUCENE-1274.patch

Attached patch.  I plan to commit in a few days.

> Expose explicit 2-phase commit in IndexWriter
> ---------------------------------------------
>
>                 Key: LUCENE-1274
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1274
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>    Affects Versions: 1.9, 2.0.0, 2.1, 2.2, 2.3, 2.3.1
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>            Priority: Minor
>             Fix For: 2.4
>
>         Attachments: LUCENE-1274.patch
>
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> Currently when IndexWriter commits, it does so with a two-phase
> commit, internally: first it prepares all the new index files, syncs
> them; then it writes a new segments_N file and syncs that, and only if
> that is successful does it remove any now un-referenced index files.
> However, these two phases are done privately, internal to the commit()
> method.
> But when Lucene is involved in a transaction with external resources
> (eg a database), it's very useful to explicitly break out the prepare
> phase from the commit phase.
> Spinoff from this thread:
>   http://mail-archives.apache.org/mod_mbox/lucene-java-dev/200804.mbox/%3C16627610.post@talk.nabble.com%3E

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