Verify the Cluster Status | Teradata Data Mover - 17.10 - Verify Cluster Status - Teradata Data Mover

Teradata® Data Mover User Guide

Product
Teradata Data Mover
Release Number
17.10
Release Date
June 2021
Content Type
User Guide
Publication ID
B035-4101-061K
Language
English (United States)

Use the dmcluster status command to check the status of a failover cluster.

Active Mode

When Data Mover services run on the designated-active servers and are monitored by the designated-active monitor, the cluster is in active mode. When checking the status of an active cluster with the dmcluster status command, the following displays:
------------------------------------------------------------------------
                        | LOCAL CLUSTER       |
------------------------------------------------------------------------
| COMPONENT             |         HOST NAME   |         STATUS         |
------------------------------------------------------------------------
| DM Daemon             |         DM1         |         RUNNING        |
| ActiveMQ              |         DM1         |         RUNNING        |
| DM Monitoring Service |         VP1         |         RUNNING        |
| DM Sync Monitor       |         DM1         |         RUNNING        |
| DM REST Service       |         DM1         |         RUNNING        |
| DSC                   |         DM1         |         RUNNING        |
| DSA REST              |         DM1         |         RUNNING        |
| DM Agent              |         DM1         |         RUNNING        |
| DM Agent              |         DM2         |         RUNNING        |
| DM Agent              |         DM3         |         RUNNING        |
------------------------------------------------------------------------
                        | REMOTE CLUSTER      |
------------------------------------------------------------------------
| COMPONENT             | HOST NAME           |              STATUS    |
------------------------------------------------------------------------
| DM Daemon             |         DM2         |         STOPPED        |
| ActiveMQ		|         DM2         |         STOPPED        |
| DM Monitoring Service |         VP2         |         STOPPED        |
| DM Sync Monitor       |         DM2         |         STOPPED        |
| DM REST Service       |         DM2         |         STOPPED        |
| DSC                   |         DM2         |         STOPPED        |
| DSA REST              |         DM2         |         STOPPED        |
| DM Agent              |         DM2         |         STOPPED        |
| DM Agent              |         DM1         |         RUNNING        |
| DM Agent              |         DM2         |         RUNNING        |
| DM Agent              |         DM3         |         RUNNING        |
------------------------------------------------------------------------

Cluster Mode: DM Cluster is in 'Active Mode'

When the designated-active Data Mover sync monitor is running and monitoring the synchronization progress from the active to standby repository, the standby Data Mover sync monitor is not in use.

Standby Mode

When failover occurs, Data Mover services run on the designated-standby server and monitored by the standby monitor, the cluster is in standby mode. When checking the status of a standby cluster with the dmcluster status command, the following displays:
------------------------------------------------------------------------
                        | LOCAL CLUSTER       |
------------------------------------------------------------------------
| COMPONENT             |         HOST NAME   |         STATUS         |
------------------------------------------------------------------------
| DM Daemon             |         DM1         |         STOPPED        |
| ActiveMQ              |         DM1         |         STOPPED        |
| DM Monitoring Service |         VP1         |         STOPPED        |
| DM Sync Monitor       |         DM1         |         STOPPED        |
| DM REST Service       |         DM1         |         STOPPED        |
| DSC                   |         DM1         |         STOPPED        |
| DSA REST              |         DM1         |         STOPPED        |
| DM Agent              |         DM1         |         RUNNING        |
| DM Agent              |         DM2         |         RUNNING        |
| DM Agent              |         DM3         |         RUNNING        |
------------------------------------------------------------------------
                        | REMOTE CLUSTER      |
------------------------------------------------------------------------
| COMPONENT             | HOST NAME           |              STATUS    |
------------------------------------------------------------------------
| DM Daemon             |         DM2         |         RUNNING        |
| ActiveMQ		|         DM2         |         RUNNING        |
| DM Monitoring Service |         VP2         |         RUNNING        |
| DM Sync Monitor       |         DM2         |         STOPPED        |
| DM REST Service       |         DM2         |         RUNNING        |
| DSC                   |         DM2         |         RUNNING        |
| DSA REST              |         DM2         |         RUNNING        |
| DM Agent              |         DM1         |         RUNNING        |
| DM Agent              |         DM2         |         RUNNING        |
| DM Agent              |         DM3         |         RUNNING        |
------------------------------------------------------------------------

Cluster Mode: DM Cluster is in 'Standby Mode'.
WARNING: Data Mover will not do failover in 'Standby Mode'. Please run 'dmcluster switchback' on primary DM server to go back to 'Active Mode' as soon as possible.

The Data Mover cluster runs in a downgraded state when in standby more. After failover, the sync monitor stops running and the synchronization service from the active to standby repository is disabled. Since an additional failover cannot occur, it is important to switch the cluster back to active mode as soon as possible. For instructions on switching from standby back to active mode, see Failing Back to the Designated-Active Daemon.