Upgrade Hardware and Keep Virtual Machines Online
Question
An administrator is planning to upgrade hardware and needs to keep the virtual machines online during the process.
Which vSphere feature will allow this to occur?
Answers
Explanations
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The vSphere feature that will allow virtual machines to remain online during hardware upgrades is vSphere Motion.
vSphere Motion is a feature that enables the live migration of a virtual machine from one physical server to another without disruption to the application or service running on the virtual machine. vSphere Motion moves the virtual machine's memory, CPU, and storage state from one host to another host in the same cluster, allowing for maintenance or hardware upgrades to occur while the virtual machine remains online.
To use vSphere Motion, the following requirements must be met:
The source and destination hosts must be part of the same vSphere cluster.
The hosts must have compatible processors.
The virtual machines must be stored on shared storage accessible to both hosts.
The hosts must have access to the same network and VLAN configurations.
When a virtual machine is migrated using vSphere Motion, the process is transparent to the user, and there is no noticeable downtime or service interruption. The migration process typically takes a few seconds to a few minutes, depending on the size of the virtual machine's memory and storage state.
In contrast, vSphere Distributed Power Management (DPM) is a feature that helps to conserve power and reduce energy costs by automatically placing hosts in standby mode when they are not needed. While DPM can help to reduce the number of hosts that need to be powered on during non-peak periods, it is not designed to keep virtual machines online during hardware upgrades.
vSphere Distributed Resource Scheduler (DRS) is a feature that automatically balances resource utilization across hosts in a vSphere cluster, ensuring that virtual machines have access to the resources they need to run. While DRS can help to optimize resource usage and prevent overloading of individual hosts, it is not designed to keep virtual machines online during hardware upgrades.
vSphere High Availability (HA) is a feature that provides automated recovery of virtual machines in the event of a host failure. While HA can help to minimize downtime in the event of a hardware failure, it is not designed to keep virtual machines online during hardware upgrades.
