Configure Meridian Core to Use Newts

Create a configuration file with the time series storage settings

sudo vi etc/opennms.properties.d/timeseries.properties

Configure Newts as the time series strategy

# Configure storage strategy
org.opennms.rrd.storeByForeignSource=true(1)
org.opennms.timeseries.strategy=newts(2)

# Configure Newts time series storage connection
org.opennms.newts.config.hostname=cassandra-ip1,cassandra-ip2(3)
org.opennms.newts.config.keyspace=newts(4)
org.opennms.newts.config.port=9042(5)

# One year in seconds
org.opennms.newts.config.ttl=31540000(6)

# Seven days in seconds
org.opennms.newts.config.resource_shard=604800(7)

1	Associate time series data by the foreign ID instead of the database-generated Node-ID.
2	Set time series strategy to use `newts`.
3	Host or IP addresses of the Cassandra cluster nodes. Can be a comma-separated list.
4	Name of the keyspace which is initialized and used.
5	Port to connect to Cassandra.
6	Retention rate for the time series data.
7	Shard metrics every 7 days.

Initialize the Newts schema in Cassandra

bin/newts init

Connect to Cassandra with the CQL shell

cd ${CASSANDRA_HOME}/bin
./cqlsh

Verify if the keyspace was properly initialized

use newts;
describe table terms;
describe table samples;

Apply changes and verify your configuration

systemctl restart opennms

With this information set, upon restart, Meridian will begin persisting metrics using the Newts engine.

Go to the Node detail page from a SNMP-managed device and verify that you see response time graphs for ICMP and node-level performance data. Only metrics stored in Newts are displayed in graphs. If you have data in RRD or JRB files, they will not be displayed unless they are migrated to Newts.