eG Monitoring
 

Measures reported by CpsLBPeerTest

When two Equalizers are configured into Active/Passive failover, they form a “failover pair”. An Equalizer in a failover pair is called a “peer”. At any given time, only one of the Equalizers in a failover pair is actually servicing requests sent to the cluster IP addresses defined in the configuration -- this unit is called the “active peer” or the “current primary” Equalizer in the failover pair. The other Equalizer, called the “passive peer” or “current backup”, does not process any client requests.

Both units continually send “heartbeat probes” or “failover probes” to one another. If the current primary does not respond to heartbeat probes, a failover occurs. In this scenario the current backup Equalizer assumes the primary role by assigning the cluster IP addresses to its network interfaces and begins processing cluster traffic.

Administrators may constantly wish to be alerted on the status of the Coyote Load Balacer peer so that they can easily identify the peer that has taken over as the primary. The CpsLBPeerTest test helps you identify this. Using this test, administrators can figure out the current state of the peer, the failover state of the peer and the failover mode. This way, administrators may be able to constantly track the peer that has taken over as the primary, if failover occurs.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
state Indicates the current state of this peer. Number The value that this measure can report and the corresponding numeric equivalent are mentioned in the table below:

Measure Value Numeric Value
Heartbeating 0

Note:

By default, this measure reports the Measure Value discussed above to indicate the current state of a peer. In the graph of this measure however, states are represented using the numeric equivalents only.
failOverState Indicates the current failover state of this peer.   The value that this measure can report and the corresponding numeric equivalent are mentioned in the table below:

Measure Value Numeric Value
FOSM Complete 0

Note:

By default, this measure reports the Measure Value discussed above to indicate the current failover state of a peer. In the graph of this measure however, states are represented using the numeric equivalents only.
failOverMode Indicates the current failover mode of this peer.   The values that this measure can report and their corresponding numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Primary 0
Backup 1

Note:

By default, this measure reports the Measure Values discussed above to indicate the current failover mode of a peer. In the graph of this measure however, states are represented using the numeric equivalents only.