Flashcards
Exame Cloud II
Cards in this deck (22)
- 1What is Virtualisation?Virtualization consists in creating simulated (or virtual) computing resources. These computing resources can include
network, storage, computing (CPU+memory). - 2Virtualization Software
- 3Advantages of Virtualization->Provide a better abstraction for users of shared resources
->Allows to share the same physical resources among multiple users
->Decoupling between the physical and virtual resources.
->Allows to share the resources among multiple users - 4VMM (Virtual Machine Monitor)->Provides the virtual hardware abstractions to the VM
->A (VM+VMM) pair constitutes an hypervisor “process”. - 5The Hypervisor->It is an operating system that runs the (VM/VMM) processes
->Sometimes VMM and hypervisor terms are used interchangeably - 6What is a Language Virtual Machine?Provides an environment with a specific instruction set and standard libraries for accessing the computer resources.
Runs as an application in an OS.
Programs are compiled for code and run in the language VM.
JAVA - 7Forms of Virtualization
- 8Requirements for Virtualization->Safety: the VM (guest OS/application) should not be able to compromise the VMM, which should have full control of the resources (real and virtual)
->Fidelity: when running, the behaviour of software on the VM should be identical to the behaviour on real
hardware.
->Efficiency: the VMM should interpose itself as little as possible while the VM is running its code - 9Describe IaaSProvides processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software
- 10What are the types of Azure Virtual Machines?->General Purpose
->Compute Optimized
->Memory Optimized
->Storage Optimized
->High Performance Optimized - 11What are the main targets for "General Purpose" Azure VM's?
- 12What are the main targets for "Compute Optimized" Azure VM's?
- 13What are the main targets for "Memory Optimized" Azure VM's?
- 14What are the main targets for "Storage Optimized" Azure VM's?
- 15What are the main targets for "GPU" Azure VM's?
- 16What are the main targets for "High Performance Compute" Azure VM's?
- 17What are the types of VM Faults?->Unplanned Hardware Maintenance Event
->An Unexpected Downtime
->Planned Maintenance events
-> - 18What are the main aspects of an "Unplanned Hardware Maintenance Event"?->Azure platform predicts that the hardware or any platform component associated to a physical machine, is about to fail.
->Azure uses Live Migration to migrate the Virtual Machines from the failing hardware to a healthy physical machine.
-> - 19What are the main aspects of an "An Unexpected Downtime"?->hardware or the physical infrastructure for the virtual machine fails unexpectedly. This can include local network failures, local disk failures, or other rack level failures
->Azure platform automatically migrates (heals) your virtual machine to a healthy physical machine in the same datacenter
->During the healing procedure, virtual machines experience downtime
(reboot) and in some cases loss of the temporary drive. The attached OS and data disks are always preserved. - 20What are fault domains?A fault domain is a logical group of underlying hardware that
share a common power source and network switch, similar to a
rack within an on-premises datacenter - 21What are update domains?An update domain is a logical group of underlying hardware that can undergo maintenance or be rebooted at the same
time. - 22What are managed Disks?->A managed disk is a virtual hard disk (VHD). Managed disks are stored as page blobs, They are an abstraction over page blobs, blob containers, and Azure
storage accounts.
->The types of disks are: Ultra disk, Premium solid state drive
(SSD), Standard SSD, and Standard hard disk drive (HDD).
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- Flashcards on Exame Cloud II, created by Bruno Penilo on 06/01/2020.
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- Bruno Penilo
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