Cloud Computing at TU München

Flashcards and summaries for Cloud Computing at the TU München

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Study with flashcards and summaries for the course Cloud Computing at the TU München

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the five essential characteristics of cloud computing?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the objectives of virtualization?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What is virtualization?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the two types of hypervisors?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What is virtualization based on a bare-metal hypervisor called?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

Name some examples of bare-metal hypervisor providers

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What is virtualization based on a hosted hypervisor called?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the advantages of VMs in a crash scenario?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the three hardware abstraction levels available in virtualization?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

How does virtual memory work and what are its advantages?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What are the advantages of Type-II virtualization over Type-I virtualization?

Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

What do cgroups do and what are they used for?

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Exemplary flashcards for Cloud Computing at the TU München on StudySmarter:

Cloud Computing

What are the five essential characteristics of cloud computing?

  • On-demand self-service
  • Broad network access for multiple types of client platforms
  • Resource pooling to serve multiple consumers using a multi-tenant model
  • Rapid elasticity
  • Measured service: Resource usage can be monitored, controlled, and reported

Cloud Computing

What are the objectives of virtualization?

  • Enhance resource sharing by many users at a time
  • Replace and upgrade hardware on the fly
  • Add new devices such as network card, processors, etc. without reboots
  • Reduce the downtime
  • Faster provisioning of multiple machines

Cloud Computing

What is virtualization?

Virtualization is a computer architecture technology by which multiple virtual machines are multiplexed in the same hardware. It entails creating virtual resources such as servers, storage, networks, and so on.

Cloud Computing

What are the two types of hypervisors?

  • Bare-metal hypervisor
  • Hosted hypervisor

Cloud Computing

What is virtualization based on a bare-metal hypervisor called?

Type-I virtualization or Hardware Abstraction Level virtualization.

Cloud Computing

Name some examples of bare-metal hypervisor providers

Hyper-V, VMware ESX/ESXi, Xen

Cloud Computing

What is virtualization based on a hosted hypervisor called?

Type-II virtualization, OS level virtualization, or hosted virtualization

Cloud Computing

What are the advantages of VMs in a crash scenario?

VMs can either

  • revert the snapchot or undo the VM operation, or
  • revert to an image backed up before the crash

Cloud Computing

What are the three hardware abstraction levels available in virtualization?

  • Full virtualization
  • Para virtualization
  • Hardware-accelerated virtualization

Cloud Computing

How does virtual memory work and what are its advantages?

It maps the program’s memory adresses (called virtual adresses) to the underlying physical memory. The OS maintains the mapping of virtual to physical memory.

Advantages: increased security, isolation, and freeing applications

Cloud Computing

What are the advantages of Type-II virtualization over Type-I virtualization?

  • Type-I virtualization can be slower (w.r.t. migrations)
  • Resource requirements are lower
  • Multiple VMs can share a single machine/cluster
  • High scalability

Cloud Computing

What do cgroups do and what are they used for?

They are a linux kernel feature which limits the usage of resources for an application or group of processes, thereby guaranteeing a certain amount of resources to that group.

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