Purpose
Displays information on the HA status of the Business Continuity Manager servers.
Syntax
SEQUENCER STATUS ;Output Values
The following table describes output that display after running SEQUENCER STATUS.
| Label | Description |
|---|---|
| HA Status | High availability status of the Business Continuity Manager. The state of individual sequencer processes on each paired Business Continuity Manager server determines HA status. The status can be one of the following:
You must intervene if the sequencer process cannot perform an automatic failover. |
| Log Replication Mode (HA only) | This label only displays for HA installations. The output can be one of the following:
|
| Individual Sequencer States | State of each sequencer, which can be one of the following:
|
| Log Percentage to Sync | The percentage of log pending synchronization from the active sequencer to the standby sequencer. Possible values:
|
| Sequencer State Counts (HA only) | Number of sequencers in Active and Standby states. |
| Process Identifier | State of each sequencer provided when at least one Watchdog is connected. |
The following table describes the relationship between the states of both sequencer processes and the resulting paired HA status.
| Sequencer State | Combination | Paired HA Status |
|---|---|---|
| Down | Waiting | Not in Peer: Waiting for sequencer startup |
| Waiting | Waiting | Establishing Peer: Waiting for sequencers |
| Active | Standby-Synchronizing | Establishing Peer: Synchronizing |
| Active | Standby | In Peer |
| Active | Standby-Unsynchronized | Not in Peer: Cannot failover |
| Active | Down | Not in Peer: Cannot failover |
| Down | Standby-Unsynchronized | Not in Peer: Cannot failover |
| Active | Active | Split Brain |
| Disabled | Disabled | Split Brain |
Examples
The following example shows output if HA is enabled.
bcmadmin> SEQUENCER STATUS;
HA Status : In Peer
Log Replication Mode : Asynchronous
Log Percentage to Sync: 0
Failover Mode : Manual
Individual Sequencer States
---------------------------
BCM1:5344 : ACTIVE
BCM2:5344 : STANDBY (SYNCHRONIZED)
Sequencer State Counts
----------------------
Active Count : 1
Standby (Synchronized) Count : 1
---------------------------------------------
Process Identifier : region2_seq
Process Type : Sequencer
Region Name : region2
Current Status : Up - Processing this bcmadmin connection
---------------------------------------------
Process Identifier : region1_seq
Process Type : Sequencer
Region Name : region1
Current Status : Up
---------------------------------------------
Process Identifier : region1_wdg
Process Type : Watchdog
Region Name : region1
Current Status : Up
---------------------------------------------
Process Identifier : region2_wdg
Process Type : Watchdog
Region Name : region2
Current Status : Up
The following example shows output if HA is not enabled.
bcmadmin> SEQUENCER STATUS;
HA Status : Not enabled
Log Replication Mode : Asynchronous
Failover Mode : Manual
---------------------------------------------
Process Identifier : region1_seq
Process Type : Sequencer
Region Name : region1
Current Status : Up - Processing this bcmadmin connection
The following example shows the percentage of log pending synchronization from the active sequencer to the standby sequencer.
bcmadmin> sequencer status;
HA Status : Synchronizing
Log Replication Mode : Asynchronous
Log Percentage to sync : 1.84
Failover Mode : Automatic
The Log Percentage to Sync is displayed at the active sequencer only if another peer sequencer is connected to the cluster.