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From Steven Rowe <>
Subject Re: Maintain a backup index
Date Tue, 05 Jun 2007 14:49:28 GMT
Hi Divya,

The Lucene library itself provides no support for "backup".

You might be interested in the Solr project[1], which extends Lucene,
and which automates index replication.  From the Solr Introduction /
Features page[2]:

    *  Efficient distribution of index parts that have changed via rsync
    * Pull strategy allows for easy addition of searchers
    * Configurable distribution interval allows tradeoff between
timeliness and cache utilization


Rajendranath, Divya wrote:
> We want to maintain a backup of our production index directory. We are
> using Lucene 2.0 v. The normal way to have backup is to run a small
> reindex script every 5 mins, which would pick up only those files which
> were modified in that time frame and reindex them. This is one way to
> rebuild and update a backup index from a master index. Is there any
> other simpler way in Lucene v2.0, which would help us do the same task?
> please let us know.

Steve Rowe
Center for Natural Language Processing

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