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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1274) Expose explicit 2-phase commit in IndexWriter
Date Sun, 27 Apr 2008 10:46:55 GMT
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: 2.3.1, 2.3, 2.2, 2.1, 2.0.0, 1.9
            Reporter: Michael McCandless
            Assignee: Michael McCandless
            Priority: Minor
             Fix For: 2.4


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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