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The Resource Index module is configured with fedora.fcfg. Here's an example of a Resource Index module configuration that uses Mulgara with delayed updates:
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<module role="fedora.server.resourceIndex.ResourceIndex"
class="fedora.server.resourceIndex.ResourceIndexModule">
<param name="level" value="1"/>
<param name="datastore" value="localMulgaraTriplestore"/>
<param name="syncUpdates" value="false"/>
</module>
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Here's another example, this time using MPTStore with immediate updates:
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<module role="fedora.server.resourceIndex.ResourceIndex"
class="fedora.server.resourceIndex.ResourceIndexModule">
<param name="level" value="1"/>
<param name="datastore" value="localPostgresMPTTriplestore"/>
<param name="syncUpdates" value="true"/>
</module>
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The example datastore configuration below (with the path parameter modified for the installation environment) would provide a local Mulgara triplestore that buffers up to 20,000 triples in memory at a time or waits for 5 seconds of buffer inactivity before flushing them to disk. Because writing triples to disk is a relatively expensive operation, the buffer takes advantage of Mulgara's bulk update handler to ingest a mass of triples at a time. The performance gain is significant during a bulk ingest of objects. The size or inactivity interval of the buffer may be adjusted according to performance needs and physical memory capacity.
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<datastore id="localMulgaraTriplestore"> <param name="connectorClassName" value="org.trippi.impl.mulgara.MulgaraConnector"/> <param name="remote" value="false"/> <param name="path" value="/opt/fedora/store/resourceIndex"/> <param name="serverName" value="fedora"/> <param name="modelName" value="ri"/> <param name="poolInitialSize" value="3"/> <param name="poolMaxGrowth" value="-1"/> <param name="readOnly" value="false"/> <param name="autoCreate" value="true"/> <param name="autoTextIndex" value="false"/> <param name="memoryBuffer" value="true"/> <param name="autoFlushDormantSeconds" value="5"/> <param name="autoFlushBufferSize" value="20000"/> <param name="bufferSafeCapacity" value="40000"/> <param name="bufferFlushBatchSize" value="20000"/> </datastore> |
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An example datastore configuration for a remote Mulgara instance follows. The Resource Index module must be configured to use this datastore.
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<datastore id="remoteMulgaraTriplestore"> <param name="connectorClassName" value="org.trippi.impl.mulgara.MulgaraConnector"/> <param name="remote" value="true"/> <param name="host" value="localhost"/> <param name="port" value="1099"/> <param name="serverName" value="fedora"/> <param name="modelName" value="ri"/> <param name="poolInitialSize" value="3"/> <param name="poolMaxGrowth" value="-1"/> <param name="readOnly" value="false"/> <param name="autoCreate" value="true"/> <param name="autoTextIndex" value="false"/> <param name="memoryBuffer" value="true"/> <param name="autoFlushDormantSeconds" value="5"/> <param name="autoFlushBufferSize" value="20000"/> <param name="bufferSafeCapacity" value="40000"/> <param name="bufferFlushBatchSize" value="20000"/> </datastore> |
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The example datastore configuration below would provide a local MPTStore triplestore backed by Postgresql.
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<datastore id="localPostgresMPTTriplestore">
<comment>
Example local MPTStore backed by Postgres.
To use this triplestore for the Resource Index:
1) In fedora.fcfg, change the "datastore" parameter of the
ResourceIndex module to localPostgresMPTTriplestore.
2) Login to your Postgres server as an administrative user and
run the following commands:
CREATE ROLE "fedoraAdmin" LOGIN PASSWORD 'fedoraAdmin'
NOINHERIT CREATEDB
VALID UNTIL 'infinity';
CREATE DATABASE "riTriples"
WITH ENCODING='SQL_ASCII'
OWNER="fedoraAdmin";
3) Make sure you can login to your Postgres server as fedoraAdmin.
4) Download the appropriate Postgres JDBC 3 driver from
http://jdbc.postgresql.org/download.html
and make sure it's accessible to your servlet container.
If you're running Tomcat, putting it in common/lib/ will work.
</comment>
<param name="connectorClassName" value="org.trippi.impl.mpt.MPTConnector"/>
<param name="ddlGenerator" value="org.nsdl.mptstore.impl.postgres.PostgresDDLGenerator"/>
<param name="jdbcDriver" value="org.postgresql.Driver"/>
<param name="jdbcURL" value="jdbc:postgresql://localhost/riTriples"/>
<param name="username" value="fedoraAdmin"/>
<param name="password" value="fedoraAdmin"/>
<param name="poolInitialSize" value="3"/>
<param name="poolMaxSize" value="10"/>
<param name="backslashIsEscape" value="true"/>
<param name="fetchSize" value="1000"/>
<param name="autoFlushDormantSeconds" value="5"/>
<param name="autoFlushBufferSize" value="1000"/>
<param name="bufferFlushBatchSize" value="1000"/>
<param name="bufferSafeCapacity" value="2000"/>
</datastore>
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