Synchronize the Active and Standby Repositories | Teradata Data Mover - 17.10 - Synchronizing the Active and Standby Repositories - 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)

When the Data Mover cluster is running in active mode, the sync monitor keeps the repositories in synchronization. Synchronization keeps components on the standby server with an up-to-date repository ready to take over if a failover occurs.

If Data Mover is configured to log alerts to server management, alerts are triggered when the repositories are no longer in synchronization. Checking dmSync.log and Postgres logs help identify the root cause to determine the appropriate corrective action.

Re-synchronize the repositories by performing the following:

  1. On the designated-active daemon server, run the dmcluster switchback command and follow the prompts:
    Prompt Action
    Do you need to sync up the two repositories? [y or n] Enter y to sync up.

    Enter 1 to back up the active repository to the standby repository.

    Enter 2 to back up the standby repository to the active repository.

    [1 or 2]

    Provide the direction of sync up by entering either 1 or 2.
  2. From the designated-active daemon server, run the dmcluster status command to verify all services are running in active mode as expected.
    It may take a few minutes for all services to transition. Run dmcluster status as needed until the results are as expected. Monitor progress in dmFailover.log on the currently active daemon and monitor servers.