If the Unity system is undergoing planned maintenance, wait until the maintenance window is complete before checking system health.
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Do one of the following:
- Log on to the primary or standby Unity server as root user
- Log on to the primary or standby Unity server as another user with sudo privileges.
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At the Linux prompt, run the following command:
unity status
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Confirm that the following processes are in a running status:
- Watchdog
- Sequencer
- Endpoint
- All Dispatcher processes
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If a process is not running run the following command at the Linux prompt to start the process:
unity start <processName>
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Do one of the following:
Status Action Process started - Investigate why the process was not running previously.
- If the reason the process was not running previously is unexpected or cannot be determined, contact Teradata Customer Support.
Process did not start - Do one of the following:
- Check if the standby sequencer can reach the managed databases and primary sequencer.
- Check if the primary sequencer can reach the managed databases and standby sequencer.
- Do one of the following:
- If a sequencer can reach the managed system and other sequencer, run the following command at the Linux prompt:
unity start <processName>
- If a sequencer cannot reach the managed databases and the sequencer, open an incident.
- If a sequencer can reach the managed system and other sequencer, run the following command at the Linux prompt:
- At the Linux prompt, run the following command to check how much disk space is left for the partition containing the /data/directory:
df -H
- If the partition is more than 80% full, contact Teradata Customer Support for instructions on removing files in the /data/directory.
- At the Linux prompt, run the following command to check for TVC messages raised since the last check that may be of concern:
grep “Unity:” /var/log/messages