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15.7.2. The Infinispan Directory

In addition to the Lucene directory implementations, JBoss Data Grid also ships with an infinispan-directory module.
The infinispan-directory allows Lucene to store indexes within the distributed data grid. This allows the indexes to be distributed , stored in-memory, and optionally written to disk using the cache store for durability.
This can be configured by having the named cache store indexes in JBoss Data Grid. For example: 
<namedCache name="indexesInInfinispan">
	<indexing enabled="true">
		<properties>
			<property name=
				"default.directory_provider" value="infinispan"/>
			<property name=
				"default.exclusive_index_use" value="false"/>
		</properties>
	</indexing>
</namedCache>
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hibernate.search is also a valid optional prefix for configuration property keys.
Sharing the same index instance using the Infinispan Directory Provider, introduces a write contention point, as only one instance can write on the same index at the same time. The property exclusive_index_use must be set to "false" and in most cases an alternative backend must be setup.
For more detailed information, refer to the JBoss Web Framework Kit Hibernate Search guide.
The default backend can be used if there is very low contention on writes, or if the application can guarantee all writes on the index are originated on the same node.

Important

The Query Module is currently only available as a Technical Preview for JBoss Data Grid 6.1.
Report a bug
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