- Consistent resource availability, such as CPU, memory, and I/O
- Consistent throughput per VM
- Availability of all Database Engine 20 VMs
Teradata requires consistent throughput for all instances of the application running in all VMs of the system. Any reduction in the throughput of a single VM can directly impact the overall system performance.
In a VM deployment, make sure that servers hosting Database Engine 20 VMs are not shared with other applications.
Database Engine 20 VMs must be fully provisioned for all resources so that the VMs reach maximum resource usage.
From the time that the database is started the system must continuously have access and performance on all Database Engine 20 nodes and VMs in the configuration.
For example, if the system is started with eight Database Engine 20 VMs in each clique, the infrastructure must maintain those eight VMs throughout the operation of the system. Any disruption to those Database Engine 20 VMs may result in a system restart and recovery. Hot standby nodes automatically enable a system restart on the unavailable VM in each clique.