WS02 MB with External Cassandra
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Here are steps to follow for achieving the task
 Download cassandra from http://cassandra.apache.org/
 Unzip "apache-cassandra-1.2.0-bin.tar.gz" in "C:/" drive
 Cassandra configuration files can be found in <CARBON_HOME>/repository/conf/etc
 Edit \<apache-cassandra-dir>\confcassandra.yaml
Ensure that the paths exist for
Verify storage_port and rpc_port do not conflict on your PC. (By default, Cassandra uses 7000 for storage_port and 9160 for rpc_port)
The storage_port must be identical between Cassandra nodes in a cluster (Cassandra client applications use rpc_port to connect to Cassandra)
*Things on recommended to do.
Change the default cluster_name to avoid conflicts with existing clusters.
initial_token can be left blank, but setting to 0 is recommended if you are configuring your first node.
 Set Memory Capacity for Cassandra
By default, Cassandra allocates memory based on the physical memory capacity of your system. From editting "<apache-cassandra-dir>\conf\cassandra-env.sh" we can set the memory capacity for cassandra
Currently we going to Cassandra test we run on smaller footprint for test drive, (Uncomment those lines)
 Start cassandra from <apache-cassandra-Dir>\bin>cassandra.bat
Now Work on WSO2 MB
 Edit "<wso2mb-Dir>\repository\conf\advancedqpid-config.xml"Uncomment "externalCassandraServerRequired" and make it "true"
<clustering> <enabled>false</enabled> <OnceInOrderSupportEnabled>false</OnceInOrderSupportEnabled> <externalCassandraServerRequired>true</externalCassandraServerRequired> Point WSO2 MB To Cassandra by editting $CARBON_HOME/repository/conf/advanced/qpid-virtualhosts.xml file to point to Cassandra server setup.
<virtualhost> <name>carbon</name> <carbon> <store> <class>org.wso2.andes.server.store.CassandraMessageStore</class> <username>admin</username> <password>admin</password> <cluster>ClusterOne</cluster> <idGenerator>org.wso2.andes.server.cluster.coordination.TimeStampBasedMessageIdGenerator</idGenerator> <connectionString>localhost:9160</connectionString> </store> ...9] Start WSO2 MB \<wso2mb-dir>\bin>wso2server.bat
 You can see some logs in Cassandra console.
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