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Cloning a virtual machine creates a virtual machine that is a copy of the original. The new virtual machine is configured with the same virtual hardware, installed software, and other properties that were configured for the original virtual machine.

For information about persistent memory and PMem storage, see the vSphere Resource Management guide.

The VM has virtual hardware resources that map to the physical hardware on the server (host). This allows for load balancing of resources across VMs on a single host. Depending on their use and level of correspondence to any physical computer, virtual machines can be divided into two categories: System Virtual Machines. How to use your CAC with Mac OS. Commercial Virtual Remote which utilizes Microsoft Teams, now has a self help page. If you have recently upgraded to Mac OS Catalina (10.15.x), then you need to follow this entire page, with EXCEPTION of disabling the built in ability. Solutions for the top current problems.

VMware Fusion: Powerfully Simple Virtual Machines for Mac. VMware Fusion Pro and VMware Fusion Player Desktop Hypervisors give Mac users the power to run Windows on Mac along with hundreds of other operating systems, containers or Kubernetes clusters, side by side with Mac applications, without rebooting. By the way – many of the steps below are applicable to Windows PCs (not only virtual machines). First you need to check the network connection on the Mac side. Mac shares the network connection with the VM, and if you can't connect to any website from the Mac side you won't be able to do it from your VM. I couldn't get virtualenv to work despite various attempts. I installed virtualenv on MAC OS X using: pip install virtualenv and have also added the PATH into my.bashprofile.

For information how to configure the virtual machine hardware options, see Configuring Virtual Machine Hardware and Configuring Virtual Machine Options

If a load generator is running in the virtual machine, before you perform the clone operation, you must stop the load generator.

You must have the following privileges to clone a virtual machine:

• Virtual machine.Provisioning.Clone virtual machine on the virtual machine you are cloning.
• Virtual machine.Inventory.Create from existing on the data center or virtual machine folder.
• Virtual machine.Configuration.Add new disk on the data center or virtual machine folder.
• Resource.Assign virtual machine to resource pool on the destination host, cluster, or resource pool.
• Datastore.Allocate space on the destination datastore or datastore folder.
• Network.Assign network on the network to which you assign the virtual machine.
• Virtual machine.Provisioning.Customize on the virtual machine or virtual machine folder if you are customizing the guest operating system.
• Virtual machine.Provisioning.Read customization specifications on the root vCenter Server if you are customizing the guest operating system.
• If the virtual machine that you clone has an NVDIMM device and virtual PMem hard disks, the destination host or cluster must have an available PMem resource. Otherwise, you cannot proceed with the task
• If the virtual machine that you clone does not have an NVDIMM device, but has virtual PMem hard disks, the destination host or cluster must have an available PMem resource. Otherwise, all hard disks of the destination virtual machine will use the storage policy and datastore selected for the configuration files of the source virtual machine.
• To access customization options for Windows guest operating systems, Microsoft Sysprep tools must be installed on the vCenter Server system. Sysprep Tool is built into the Windows Vista and Windows 2008 and later operating systems. For details about this and other customization requirements, see Guest Operating System Customization Requirements.

Procedure

1. Start the Clone Existing Virtual Machine wizard. Option

   Action
   From a valid parent object of a virtual machine	Right-click any inventory object that is a valid parent object of a virtual machine, such as a data center, cluster, vApp, resource pool, or host, and select New Virtual Machine. On the Select a creation type page, select Clone an existing virtual machine, and click Next. On the Select a virtual machine page, select the virtual machine that you want to clone.
   From a virtual machine	Right-click a virtual machine and select Clone > Clone to Virtual Machine.

2. On the Select a name and folder page, enter a unique name for the new virtual machine, select a deployment location, and click Next.
   The template name determines the name of the files and folder on the disk. For example, if you name the template win8tmp, the template files are named win8tmp.vmdk, win8tmp.nvram, and so on. If you change the template name later, the names of the files on the datastore do not change.

   Folders provide a way to store virtual machines and templates for different groups in an organization and you can set permissions on them. If you prefer a flatter hierarchy, you can put all virtual machines and templates in a data center and organize them in a different way.

3. On the Select a compute resource page, select the host, cluster, resource pool, or vApp where the virtual machine will run and click Next.
   The Compatibility pane shows the result from the compatibility checks.
4. On the Select storage page, select the datastore or datastore cluster in which to store the template configuration files and all virtual disks. Option

   Action
   Clone a virtual machine that has vPMem hard disks	Select the type of storage for the template by clicking the Standard, the PMem, or the Hybrid radio button. If you select the Standard mode, all virtual disks are stored on a standard datastore. If you select the PMem mode, all virtual disks are stored on the host-local PMem datastore. Configuration files cannot be stored on a PMem datastore and you must additionally select a regular datastore for the configuration files of the virtual machine. If you select the Hybrid mode, all PMem virtual disks remain stored on a PMem datastore. Your choice of a VM storage policy and datastore or datastore cluster affects the non-PMem disks. (Optional) From the Select virtual disk format drop-down menu, select a new virtual disk format for the template or keep the same format as the source virtual machine. (Optional) From the VM Storage Policy drop-down menu, select a virtual machine storage policy or leave the default one. Select a datastore or a datastore cluster. Select the Disable Storage DRS for this virtual machine check box if you do not want to use storage DRS with the virtual machine. (Optional) Enable the Configure per disk option to select a separate datastore or a datastore cluster for the template configuration file and for each virtual disk. Note: You can use the Configure per disk option to convert a PMem hard disk to a regular one, but that change might cause performance problems. You can also convert a standard hard disk to a PMem hard disk.
   Clone a virtual machine that does not have vPMem hard disks	Select the disk format for the virtual machine virtual disks. The Same format as source option uses the same disk format as the source virtual machine. The Thick Provision Lazy Zeroed format creates a virtual disk in a default thick format. The space required for the virtual disk is allocated when the virtual disk is created. Data remaining on the physical device is not erased during creation, but is zeroed out later, on demand, on first write from the virtual machine. Thick Provision Eager Zeroed is a type of thick virtual disk that supports clustering features such as Fault tolerance. The space required for the virtual disk is allocated at creation time. In contrast to the flat format, the data remaining on the physical device is zeroed out when the virtual disk is created. It might take much longer to create disks in this format than to create other types of disks. The Thin Provision format saves storage space. At first, a thin provisioned disk uses only as much datastore space as the disk initially needs. If the thin disk needs more space later, it can grow to the maximum capacity allocated to it. (Optional) Select a VM storage policy or leave the default one. Select a datastore or a datastore cluster. (Optional) Enable the Configure per disk option to select a separate datastore or a datastore cluster for the template configuration file and for each virtual disk. Note: You can use the Configure per disk option to convert a PMem hard disk to a regular one, but that change might cause performance problems. You can also convert a standard hard disk to a PMem hard disk.

5. Click Next.
6. On the Select clone options page, select additional customization options for the new virtual machine and click Next.
   You can choose to customize the guest operating system or the virtual machine hardware. You can also choose to power on the virtual machine after its creation.
7. (Optional) On the Customize guest OS page, apply a customization specification to the virtual machine and click Next.
   Customizing the guest operating system prevents from conflicts that might occur if you or other users clone virtual machines with identical settings, such as duplicate computer names.
   Option

   Action
   Select an existing specification	Select a customization specification from the list.
   Override	To change the guest customization specification for this deployment only, click Override, complete the steps in the Override VM Customization Specification wizard, and click OK.

8. (Optional) On the User settings page, specify the required settings for the virtual machine.
   This page of the wizard appears only if the selected specification requires additional customization.
9. (Optional) On the Customize hardware page, configure the virtual machine hardware and options and click Next.
   You can leave the defaults and configure the virtual machine hardware and options later.

   Important: If you chose to use PMem storage for the virtual machine, its default hard disk, the new hard disks that you configure, and the NVDIMM devices that you add to the virtual machine all share the same PMem resources. You must adjust the size of the newly added devices in accordance with the amount of the PMem available to the host. If any part of the configuration requires attention, the wizard alerts you.
10. On the Ready to complete page, review the virtual machine settings and click Finish.

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What is a virtual machine?

A Virtual Machine(VM) is a compute resourcethat uses software instead of a physical computerto runprograms and deployapps. One or more virtual 'guest' machinesrun on aphysical 'host' machine.Each virtual machine runs its own operating systemand functions separately from the other VMs,even when they are all running on the same host. This means that, for example,a virtual MacOS virtual machine can run on a physical PC.

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Virtual machine technology is used for many use cases across on-premises and cloud environments. More recently, public cloud servicesare using virtual machines toprovide virtual application resourcesto multiple users at once, for even more cost efficient and flexible compute.

What are virtual machines used for?

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Virtual machines(VMs) allow a business to run an operating system that behaves like a completely separate computer in an app window on a desktop. VMsmay be deployed to accommodate different levels of processing power needs, to run software that requires a different operating system, or to test applications in a safe, sandboxed environment.

Virtual machines have historically been used forserver virtualization, which enables IT teams to consolidate their computing resources and improve efficiency. Additionally, virtual machines can perform specific tasks consideredtoo risky to carry out in a host environment, such as accessing virus-infected data or testing operating systems. Since the virtual machine is separated from the rest of the system, the software inside the virtual machine cannot tamper with the host computer.

How do virtual machines work?

The virtual machine runs as a process in an application window, similar to any other application, on the operating system of the physical machine. Key files that make up a virtual machine include a log file, NVRAM setting file, virtual disk file and configuration file.

Advantages of virtual machines

Virtual machines are easy to manage and maintain, and they offer several advantages over physical machines:

• VMs can run multiple operating system environments on a single physical computer, saving physical space, time and management costs.

• Virtual machines support legacy applications, reducing the cost of migrating to a new operating system. For example, aLinux virtual machine running a distribution of Linux as the guest operating system can exist on a host server that is running a non-Linux operating system, such as Windows.

• VMs can also provide integrateddisaster recoveryand application provisioning options.

Disadvantages of virtual machines

While virtual machines have several advantages over physical machines, there are also some potential disadvantages:

• Running multiple virtual machines on one physical machine can result in unstable performance if infrastructure requirements are not met.

• Virtual machines are less efficient and run slower than a full physical computer. Most enterprises use a combination of physical and virtual infrastructure to balance the corresponding advantages and disadvantages.

The two types of virtual machines

Users can choose from two different types of virtual machines—process VMs and system VMs:

A process virtual machineallows a single process to run as an application on a host machine, providing a platform-independent programming environment by masking the information of the underlying hardware or operating system. An example of a process VM is the Java Virtual Machine, which enables any operating system to run Java applications as if they were native to that system.

A system virtual machineis fully virtualized to substitute for a physical machine. A system platform supportsthe sharing of a host computer's physical resources between multiple virtual machines, each running its own copy of the operating system. This virtualization process relies on ahypervisor, which can run on bare hardware, such as VMware ESXi,or on top of an operating system.

What are 5 types ofvirtualization?

All the components of a traditional data center or IT infrastructure can be virtualized today, with various specific types of virtualization:

• Hardware virtualization:When virtualizing hardware, virtual versions of computers and operating systems (VMs) are created and consolidated into a single, primary, physical server. A hypervisor communicates directly with a physical server's disk space and CPU to manage the VMs. Hardware virtualization, which is also known as server virtualization, allows hardware resources to be utilized more efficiently and for one machine to simultaneously run different operating systems.
  

• Software virtualization:Software virtualization creates a computer system complete with hardware that allows one or more guest operating systems to run on a physical host machine. For example, Android OS can run on a host machine that is natively using a Microsoft Windows OS, utilizing the same hardware as the host machine does.Additionally, applications can be virtualized and delivered from a server to an end user's device, such as a laptop or smartphone. This allowsemployees to accesscentrally hosted applications when working remotely.
  

• Storage virtualization:Storage can be virtualized by consolidating multiple physical storage devices to appear as a single storage device. Benefits include increased performance and speed, load balancing and reduced costs. Storage virtualization also helps with disaster recovery planning, as virtual storage data can be duplicated and quickly transferred to another location, reducing downtime.
  

• Network virtualization:Multiple sub-networks can be created on the same physical network by combiningequipment into a single, software-based virtual network resource. Network virtualization also divides available bandwidth into multiple, independent channels, each of which can be assigned to servers and devices in real time. Advantages include increased reliability, network speed,security and better monitoring of data usage. Network virtualization can be a good choice for companies with a high volume of users who need access at all times.
  

• Desktop virtualization:This common type of virtualization separates the desktop environment from the physical device and stores a desktop on a remote server, allowing users to access their desktops from anywhere on any device. In addition to easy accessibility, benefits of virtual desktops includebetter data security, cost savingson software licenses and updates, andease of management.

Container vs virtual machine

Likevirtual machines, container technology such as Kubernetesissimilar in the sense of running isolated applications on a single platform. While virtual machines virtualize the hardwarelayer to create a 'computer,'containers package up just a single app along with its dependencies.Virtual machines are often managed by a hypervisor, whereas container systems provide shared operating system services from the underlying host and isolate the applications using virtual-memory hardware.

A key benefit of containersis that they have less overhead compared to virtual machines. Containers include only the binaries, libraries and other required dependencies, and the application. Containers that are on the same host share the same operating systemkernel, making containers much smaller than virtual machines.As a result,containers boot faster, maximize server resources,and makedelivering applicationseasier. Containershave become popluar foruse cases such as web applications, DevOps testing, microservices and maximizing the number of apps that can be deployed per server.

Virtual machinesare larger and slower to boot than containers. They are logically isolated from one another, with their own operating system kernel, and offer the benefits of a completely separate operating system. Virtual machines are best for running multiple applications together, monolithic applications, isolation between apps, and for legacy apps running on older operating systems.Containers and virtual machines may also be used together.

Setting up a virtual machine

Virtual machines can be simple to set up, and there are many guides online that walk users through the process. VMware offers one such usefulvirtual machine set-up guide.

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