Statistics

The Cassandra CQL resource adaptor updates the default parameter set. You can monitor the health of your Cassandra CQL resource adaptor entity using the Rhino statistics tools. For example. to monitor the stats from the command line (<entity-name> is the name of your resource adaptor entity):

rhino-stats -m SLEE-Usage.RAEntities.<entity-name>.(default)

The statistics collected by the Cassandra CQL resource adaptor are:

Statistic Type Description

ClusterConnectionDown

Counter

Connection to the cluster is down

ClusterConnected

Counter

Connected to the cluster

ConnectAttempts

Counter

An attempt to connect to the cassandra cluster

FailedToStartActivity

Counter

Rhino TAS did not allow us to start an activity

FailedToSubmitEvent

Counter

Rhino TAS did not allow us to submit an event for delivery

SynchronousQueryAttempts

Counter

A synchronous query is made against cassandra

SuccessfulSynchronousQuery

Counter

A synchronous query made against cassandra is successful

FailedSynchronousQuery

Counter

A synchronous query made against cassandra failed

FailedToPrepareStatement

Counter

A synchronous attempt to prepare a query failed

ASynchronousQueryAttempts

Counter

An asynchronous query is made against cassandra

SuccessfulASynchronousQuery

Counter

An asynchronous query made against cassandra is successful

FailedASynchronousQuery

Counter

An asynchronous query made against cassandra failed

SynchronousQueryDuration

Sample

A sample statistic of the duration of a query (ns) against cassandra

StatementPrepareDuration

Sample

A sample statistic of the time taken (ns) to prepare a statement against cassandra

You can define your own threshhold alarms that are a function of the statistics the Cassandra CQL resource adaptor collects. See Threshold Alarms in the Rhino TAS Admin Guide for more information about defining threshold based alarms.

Alarms

The following alarms may be raised with a source of OpenCloud <entity-name> <version> (for a resource adaptor entity <entity-name>, of version <version>).

Category Level Alarm Type Message

CassandraCQLRA

CRITICAL

CassandraCQLRA.ConnectToCluster

"Not connected to cassandra. Attempting to connect each %ds"

RA Framework

WARNING

active-reconfiguration

"Updates to %s "${instance}" will not take effect until the RA entity is restarted."

RA Framework

CRITICAL

misconfiguration

"RA configuration error, operational functionality disabled. Update the RA entity with a valid configuration to resolve."

RA Framework

MINOR

misconfiguration

"RA configuration update failed. Continuing operational functionality using the last valid configuration."

RA Framework

MINOR

update-ignored

"Update to %s "${instance}" failed, continuing with its last valid configuration"

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