Grouped the Newts documents in their own section and reworked the TOC…

… levels.

opennms-doc/guide-admin/src/asciidoc/text/operation/newts/cassandra21x.adoc

@@ -1,14 +1,14 @@
 
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-=== Cassandra monitoring
+==== Cassandra Metrics
 
 This section describes some of the metrics _OpenNMS_ collects for monitoring _Apache Cassandra_ v2.1.x.
 By default the category `Cassandra21x` is used to enable the data collection on a node.
 Also, the service name `JMX-Cassandra` is used to bind this data collection to a node's interface.
 The _JMXCollector_ is used to retrieve the _MBean_ entities from the _Cassandra_ node.
 
-==== Thread pools
+===== Thread pools
 
 _Apache Cassandra_ is based on _Staged Event Driven Architecture_ (SEDA).
 This separates different operations in stages and these stages are loosely coupled using a messaging service.
@@ -49,7 +49,7 @@ For each of these the following metrics are collected by _OpenNMS_:
 | `TotalBlockedTasks` | Number of tasks that have been blocked in total
 |===
 
-==== Message dropped
+===== Message dropped
 
 Load shedding is part of the _Apache Cassandra_ architecture.
 The number of dropped messages in the different message queues are good indicators whether a cluster can handle its load:
@@ -64,7 +64,7 @@ The number of dropped messages in the different message queues are good indicato
 * _TRACE
 * BINARY
 
-==== Compaction manager
+===== Compaction manager
 
 The following compaction manager metrics are monitored by _OpenNMS_:
 
@@ -77,7 +77,7 @@ The following compaction manager metrics are monitored by _OpenNMS_:
 | `TotalCompactionsCompleted` | Total number of completed compaction tasks
 |===
 
-==== Storage
+===== Storage
 
 The following storage metrics are collected by _OpenNMS_:
 
@@ -90,7 +90,7 @@ The following storage metrics are collected by _OpenNMS_:
 | `TotalHintsInProgress` | Number of hints currently active on this node
 |===
 
-==== Client connections
+===== Client connections
 
 The number of client connections are also collected:
 
@@ -101,7 +101,7 @@ The number of client connections are also collected:
 | `connectedThriftClients` | Metrics for connected thrift clients
 |===
 
-==== JVM Metrics
+===== JVM Metrics
 
 Some key metrics from the running Java virtual machine are also collected:
 

opennms-doc/guide-admin/src/asciidoc/text/operation/newts/introduction.adoc

@@ -0,0 +1,5 @@
+
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+This section describes how to configure _Newts_ and how use _OpenNMS_ to monitor your Cassandra cluster.

opennms-doc/guide-admin/src/asciidoc/text/operation/newts/newts.adoc

@@ -1,14 +1,14 @@
 
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-=== Newts
+==== Newts Metrics
 
 This section describes some of the metrics _OpenNMS_ collects for monitoring the _Newts_ keyspace on an _Apache Cassandra_ node.
 The category `Newts` is used to enable the data collection on a node.
 Also, the service name `JMX-Cassandra-Newts` is used to bind this data collection to a node's interface.
 The _JMXCollector_ is used to retrieve the _MBean_ entities from the _Cassandra_ node.
 
-==== Keyspace newts
+===== Newts Keyspace Metrics
 
 The following metrics will be collected by _OpenNMS_: