Chapter 20. Cache Writing Modes

Procedure 20.1. Configure a Write-Through Local File Cache Store

<?xml version="1.0" encoding="UTF-8"?>
<infinispan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
            xmlns="urn:infinispan:config:6.2">
	<global />
	<default />
	<namedCache name="persistentCache">
		<persistence>
		    <singleFile fetchPersistentState="true" 
			    ignoreModifications="false"
			    purgeOnStartup="false"
			    shared="false"
			    location="${java.io.tmpdir}"/>
		</persistence>
  	</namedCache>
</infinispan>

<?xml version="1.0" encoding="UTF-8"?>
<infinispan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
            xmlns="urn:infinispan:config:6.2">
	<global />
	<default />
	<namedCache name="persistentCache">
		<persistence>
		    <singleFile fetchPersistentState="true" 
			    ignoreModifications="false"
			    purgeOnStartup="false"
			    shared="false"
			    location="${java.io.tmpdir}"/>
		</persistence>
  	</namedCache>
</infinispan>

1. The name parameter specifies the name of the namedCache to use.
2. The fetchPersistentState parameter determines whether the persistent state is fetched when joining a cluster. Set this to true if using a replication and invalidation in a clustered environment. Additionally, if multiple cache stores are chained, only one cache store can have this property enabled. If a shared cache store is used, the cache does not allow a persistent state transfer despite this property being set to true. The fetchPersistentState parameter is false by default.
3. The ignoreModifications parameter determines whether operations that modify the cache (e.g. put, remove, clear, store, etc.) do not affect the cache store. As a result, the cache store can become out of sync with the cache.
4. The purgeOnStartup parameter specifies whether the cache is purged when initially started.
5. The shared parameter is used when multiple cache instances share a cache store and is now defined at the cache store level. This parameter can be set to prevent multiple cache instances writing the same modification multiple times. Valid values for this parameter are true and false.