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Posted to oak-issues@jackrabbit.apache.org by "Chetan Mehrotra (JIRA)" <ji...@apache.org> on 2017/09/27 05:00:00 UTC

[jira] [Created] (OAK-6726) Use addDocument instead of updateDocument while reindexing with Lucene

Chetan Mehrotra created OAK-6726:
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             Summary: Use addDocument instead of updateDocument while reindexing with Lucene
                 Key: OAK-6726
                 URL: https://issues.apache.org/jira/browse/OAK-6726
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: lucene
            Reporter: Chetan Mehrotra
            Assignee: Chetan Mehrotra
            Priority: Minor
             Fix For: 1.8


Currently the DefaultIndexWriter uses [updateDocument|https://lucene.apache.org/core/4_7_1/core/org/apache/lucene/index/IndexWriter.html#updateDocument(org.apache.lucene.index.Term, java.lang.Iterable)] while adding/updating document in index. This is fine for incremental indexing where we cannot be sure if index already has that entry. This call first does a search for existing document matching the term and then deletes and add the new document

However for reindex case where we start from empty index we can use [addDocument|https://lucene.apache.org/core/4_7_1/core/org/apache/lucene/index/IndexWriter.html#addDocument(java.lang.Iterable)]. This avoids the extra work for search

In test where index had ~70M entries switch to addDocument resulted in 10 min reduction in reindexing timings



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