What is VM? · Ultra Transcenders glossary

A computer implemented entirely in software, having virtual hardware and its own guest OS; ESX hosts run it and vCenter manages it.

Also called virtual machine.

In the Ultra Transcenders books

Each book explains VM in context, with comparison tables and the common traps.

HAVING
Applies a condition to groups produced by GROUP BY, often on an aggregate such as SUM(). WHERE works earlier, on individual rows before they are grouped.
ESX
VMware's bare-metal hypervisor, installed on each host in a VCF fleet. Up to version 9.0 it was known as ESXi.
vCenter
Management software for VMs, clusters and ESX hosts. Each domain in VCF gets a dedicated one.

Amazon EC2
Amazon's virtual machine offering. Defender for Cloud can onboard EC2 instances automatically, installing Azure Arc and Defender components, when its AWS connector has Defender for Servers turned on.
AMD SEV-SNP
Hardware feature from AMD that encrypts and isolates virtual machine memory; the confidential VM series DCasv5/DCadsv5 and ECasv5/ECadsv5 rely on it.
Autoscaling local storage
Before a node's disk fills, extra managed disks are attached to it, up to 5 TB for each virtual machine. This is on by default for every compute resource and pool.
Confidential VM
Virtual machine on Intel TDX or AMD SEV-SNP hardware, with memory encrypted against the host; it requires a confidential size such as DCasv5 or ECasv5 and a supported image.
Discrete Device Assignment
A Hyper-V capability that hands an entire PCIe device, a graphics card or NVMe drive for example, directly to a single virtual machine.
Dynamic Memory
A Hyper-V capability that gives a running virtual machine more or less memory as demand changes, staying within its configured startup, minimum and maximum amounts.
Enhanced session mode
A VMConnect mode in Hyper-V that runs over RDP, giving a virtual machine's console window resizing, a shared clipboard, sound and redirection of local devices.
GitHub-hosted runner
A new virtual machine, managed by GitHub, provided for each GitHub Actions job and chosen by a label such as ubuntu-latest. On GitHub Team and Enterprise Cloud, larger runners offer extra resources.