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By: cdoyle
April 19, 2017
Cloud+ Outline - Modules 5 and 6

By: cdoyle
April 19, 2017

- Hypervisor
- Loaded as a core
- Virtual machines loaded on bare metal
- Operating system installed then VM loaded on OS
- Both are controlled with a Hypervisor (ESX)
- Company products only work with a company’s product
- MAC is proprietary
- Device will not work with any gear that is not made by
- Usually requires a license key or subscription
- Products work with many other products
- Linux is Open Source
- Device will work with almost any gear device
- Usually does not require a license key or subscription
- Consumer vs Enterprise
- Use less operating systems in the network
- Does not support many users
- Uses type 2 hypervisor
- Has more servers and operating systems in the network
- Created to support many users
- Uses type 1 hypervisor
- Hardware-Assisted Virtualization
- Improves virtualizations
- Utilizes the hardware of the host PC
- Hyper-V
- VMWare
- Basic Input/Output System (BIOS)
- Preloaded software from the manufacturer
- Saved on chip attached to the motherboards
- Used for a quick save of features on a computer w/o having to discover all settings
- Central Processing Unit (CPU)
- Used as the brain of a computer
- More cores means more functions at a time
- One virtual PC needs a core
- Memory
- Random Access Memory (RAM) quick access memory for the computer to use
- RAM executes faster than a hard drive (about 17 GB a second vs 6 GB a second)
- Fast and large RAM provides for a better virtualization host
- Network Interface Cards (NICs)
- Allows for a PC to access the LAN
- Faster NICs give a faster transfer of data
- NIC typically have a RJ-45 connector that allows the server to share out data to the other hosts
- Virtual Disks
- A file that acts as a hard drive
- Most Virtual DIsks are in a VHD format
- The VHD size is determined when the files is created in a virtualization program
- Virtual NICs
- Used to simulate a NIC for the Virtual Machine
- Functions as a physical NIC for the machine
- All components are logical
- A Virtual NIC is needed for each virtual machine
- Virtual Switches
- Functions as a regular switch
- Allows the user to control packets and traffic in the virtual environment
- Gives isolation of network switch
- External
- Internal
- Memory
- Virtual Machine can only use memory that is available on the host
- Size is set during the build but can be changed at a later time if needed
- If the host machine does not have enough memory the virtual machine cannot start
- Storage Virtualization
- Cluster of hard drive used at a central location
- The cluster of drives are grouped together for a pool of resources for the network
- Each cluster has a NIC that allows for multiple host or virtual machines to connect to the storage
- Guest Tools
- Type II addition that allows for additional functions to the virtual experience
- Modifies the performance of the VM
- Provisioning
- Thin-provision
- Uses only what is needed
- Small device that functions as a PC
- Thick-provision
- Uses all resources
- A fixed size on the virtual disk
- Baselines of a computer or computer’s resources to start a VM
- Templates provide a set of steps to deploy a fully functioning computer
- Migrates a virtual server to a virtual server
- The OS, data and programs are migrated to the new VMs
- Can be automated
- Migrates a physical server to a virtual server
- The OS, data and programs are migrated to the new VMs
- Migrates a virtual server to a physical server
- The OS, data and programs are migrated to the new physical server
- Requires special tools to migrate
- Mainly used for testing
- Some application cannot perform on VM, V2P relieves this
- Create copies of the VM
- Used to make copies of a machine
- Clones can be identical allowing many copies of the same machine.
- Upgrading
- Host OS will need to be upgraded
- VM or Hyper-V might need upgrade
- Research OS before moving VM
- Monitor machine before migration begins
- Clean the system up before migration
- Plan maintenance before migration
- Have downtime before migration
- Have a plan to migrate, milestones
- Perform test before and after the VM migration is performed
- Network settings and configuration should be tested
- Backups need to be tested before and after the migration
- Reboot the VM and server several times