Node Failure Recovery of Multi-Node Systems | Teradata Vantage on Azure (DIY) - 2.2 - Node Failure Recovery of Multi-Node Systems - Teradata Vantage on Azure

Teradata Vantageā„¢ on Azure (DIY) Installation and Administration Guide

Product
Teradata Vantage on Azure
Release Number
2.2
Release Date
August 2021
Content Type
Administration
Configuration
Installation
Publication ID
B035-2810-071K
Language
English (United States)
When a node fails, the system automatically stops and deallocates the failed node, which might result in losing diagnostic information. You cannot recover a failed node unless it is stopped and deallocated, as the Azure platform restricts detaching NICs.

On a Vantage multi-node system, NFR automatically replaces the failed nodes with the same number of available hot standby nodes (HSNs). If there are no HSNs or not enough available HSNs, NFR automatically spins up one or more replacement nodes, detaches the network-attached storage of the failed node, reattaches the network-attached storage to the new VM, migrates the secondary IPs from the failed node NIC to the new VM NIC, and reinstates the configuration. The replacement node is deployed from a snapshot of the active (control) node.

NFR takes longer than a typical TPA reset. If your node does not automatically recover after 10 to 15 minutes, check the deployment logs in your Azure resource group.

For assistance, contact Teradata Services.