What is the benefit of EVC? Because EVC allows you to migrate virtual machines between different generations of CPUs, with EVC you can mix older and newer server generations in the same cluster and be able to migrate virtual machines with vMotion between these hosts.
For example, as shown in the above figure, the CPU Model Intel Xeon E5-2600 v2 supports the following EVC baselines:
- Intel® Westmere (oldest generation)
- Intel® Nehalem.
- Intel® Penryn.
- Intel® Merom.
- Intel® Ivy-Bridge.
- Intel® Sandy-Bridge.
- Intel® Haswell (newer generation)
New EVC mode features are not available to the virtual machines until they are powered off and powered back on again. A full power cycling is required. Rebooting the guest operating system or suspending and resuming the virtual machine is not sufficient.
Validated and EVC enabled – The bank account details are validated and this bank account is enabled for EVC. So when you request EVC code you will get it on the mobile number registered with the bank for this account automatically.
Enhanced vMotion enables migration to another ESXi host and datastore, even in vSphere environments without shared storage. In order to use Enhanced vMotion, both hosts must be on the same layer 2 network and vSphere Web Client must be used.
Q: Does Hyper-V have a feature like VMware's Distributed Resource Scheduling and its vMotion? A: Yes, it does. Hyper-V has the same ability through its Live Migration technology, allowing VMs to be moved between hosts in a Failover Cluster without downtime.
vSphere Fault Tolerance (FT) provides a live shadow instance of a virtual machine (VM) that mirrors the primary VM to prevent data loss and downtime during outages.
Steps to migrate virtual machine from VMware vSphere client
- Log in to VMware vSphere client console.
- Right-click the virtual machine and select Migrate.
- Go to Migrate Virtual Machine.
- Select the Change host as the Migration Type and click Next.
- Select the destination host and click Next.
The VMware vMotion process is completed in three steps: The virtual machine health is verified to be stable by vCenter Server. The memory, registers, and network connections are copied to the target host (virtual machine state) The virtual machine is then able to resume operations on the new target host.
Other flavors are Long Distance vMotion and Cross vCenter vMotion which both are primarily vCenter Server operations on top of the ESXi side of the vMotion process. Reading this article will give you a better understanding of the 'magic' that is happening under the hood when you initiate a virtual machine migration.
With VMotion enabled, an active virtual machine can be moved automatically or manually from one ESX host to another. An automatic situation would be as described earlier when a DRS cluster is configured for full automation.
The first iteration of VMotion (yes, it originally had a capital V) was released with VMware Virtual Center 1.0 in 2003.
Server virtualization with VMware uses software to simulate the hardware and create a virtual computer system. Virtualization allows businesses to run multiple operating systems and applications on a single physical device. Within IT infrastructures, virtual computer systems are known as “virtual machines†.
Each physical CPU requires at least one license, so four vSphere Enterprise Plus 7 licenses are required. No additional licenses will be needed regardless of the number of VMs or the amount of virtual memory (vRAM).
EVC stands for Enhanced vMotion Compatibility which is a vCenter Server cluster-centric feature allowing virtual machines to vMotion or migrate across ESXi hosts equipped with dissimilar processors in the same cluster.
vMotion Requirements
- CPU compatibility.
- vMotion interface (minimum 1 Gb adapter)
- Shared storage.
- Same naming for virtual port groups.
- VMkernel port group with vMotion enabled.
- Sufficient resources on the target host.
- At least one vSphere Essentials Plus license on the Corresponding ESX host.
Click the VMs tab. A list of all virtual machines in the selected cluster or on the selected host appears. To verify the status of the CPU mode, check the EVC CPU Mode column. Click the angle icon next to any column title and select Show/Hide Columns > EVC CPU Mode.
An Electronic Verification Code (EVC) is a 10 digit alphanumeric code that is sent to the registered mobile number of the tax filer while filing his/her returns online. An EVC can be generated through the e-filing portal of the Income Tax Department.
Procedure
- Select a cluster in the vSphere inventory.
- Power off all the virtual machines on the hosts with feature sets greater than the EVC mode.
- Click the Configure tab, select VMware EVC, and click Edit.
- Enable EVC for the CPU vendor and feature set appropriate for the hosts in the cluster, and click OK.
The general recommendation is to have EVC enabled as it will help you in the future where you'll be scaling your clusters with new hosts that might contain new CPU models.
Enhanced Linked Mode (ELM) is one of the vSphere advanced features that allows connecting multiple vCenter Servers to provide a single interface where you can view, search, and manage permissions, replications of roles, policies, and licenses between various vCenter Servers.
What are two requirements to enable EVC in vSphere DRS cluster? (Choose two.) CPUs must be from the same vendor.EVC must use the lowest possible baseline supported by the hardware.CPUs must be in the same family and of the same speed.
Click the Manage tab and click Settings. Select VMware EVC and click Edit. Select whether to enable or disable EVC. The EVC feature is disabled.
