That was tried with Lucandra/Solandra, which stored the Lucene index in Cassandra, but was less than optimal, so that model was discarded in favor of indexing Cassandra data directly into Solr/Lucene, side-by-side in each Cassandra node, but in native Lucene. The latter approach is now available from DataStax as DataStax Enterprise (DSE), which also integrates Hadoop. DSE provides the best of Cassandra integrated tightly with the best of Solr.

In DSE, Cassandra takes care of all the cluster management, with Solr indexing the local Cassandra data, handing off incoming updates to Cassandra for normal Cassandra storage, and using a variation of the normal Solr code for distributing queries and merging results from other nodes, but depending on Cassandra for information about cluster configuration.

(Note: I had proposed to talk in more detail about the above at Lucene Revolution, but my proposal was not accepted.)

See:
http://www.datastax.com/what-we-offer/products-services/datastax-enterprise

As it says, "DataStax Enterprise is completely free for development work."

-- Jack Krupansky

-----Original Message----- From: Rider Carrion Cleger
Sent: Tuesday, May 14, 2013 4:35 AM
To: java-user-i...@lucene.apache.org ; java-user-...@lucene.apache.org ; java-user@lucene.apache.org
Subject: lucene and mongodb

Hi team,
I'm working with apache lucene 4.2.1 and I would like to store lucene index
in a NoSql database.
So my questions are,
- Can I store the lucene index in a mongodb database ?

thanks you team!

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