IT2314 Virtualization vs Cloud Computing

Questions and Answers

What is the primary purpose of replication protocols in a distributed storage system?

To reduce the cost of storage

To enhance the user interface

To increase storage capacity

To ensure data consistency between copies (correct)

What feature does the Elastic Volume Service (EVS) provide to enhance storage performance?

Automated data compression

Blockchain technology

Cache acceleration techniques (correct)

In-built antivirus protection

Which storage service is specifically designed for scalable, high-performance file storage?

Basic Storage Service (BSS)

Object Storage Service (OBS)

Elastic Volume Service (EVS)

Scalable File Service (SFS) (correct)

Which characteristic is NOT associated with the Object Storage Service (OBS)?

Support for structured data Signup and view all the answers

What ensures that only one primary copy exists for a piece of data in a replication setting?

Primary and backup copy designation Signup and view all the answers

What is the primary role of virtualization in cloud computing?

To convert physical hardware into virtual resources. Signup and view all the answers

Which of the following is a benefit of partitioning in virtualization?

It allows multiple VMs to run on one physical server. Signup and view all the answers

What does the isolation feature of virtualization provide?

Protection for VMs from each other during faults. Signup and view all the answers

How can virtual machines be migrated in a virtualization system?

By copying and pasting VM files. Signup and view all the answers

What is a hypervisor in the context of virtualization?

Virtualization software that creates and runs VMs. Signup and view all the answers

What is meant by 'encapsulation' in virtualization?

VMs exist as files, allowing easy migration. Signup and view all the answers

Which components typically make up a computer system in the ICT industry?

CPU, memory, disk, network resources. Signup and view all the answers

What is the guest OS in virtualization?

The OS running on a virtual machine. Signup and view all the answers

What is the primary function of NAT?

To avoid the lack of IP addresses and protect private networks Signup and view all the answers

Which statement is true concerning Open vSwitch (OVS)?

OVS is software-based and supports multiple standards including OpenFlow. Signup and view all the answers

What technology significantly improves I/O performance in Enhanced vSwitch (EVS)?

Intel DPDK technology Signup and view all the answers

How do Distributed Virtual Switches (DVS) operate in relation to virtual machines (VMs)?

DVS construct the network between VMs and connect them to external networks. Signup and view all the answers

What advantage do virtual switches have over traditional switches?

They simplify network architecture and reduce device count. Signup and view all the answers

What is a Virtual Private Cloud (VPC) on HUAWEI CLOUD?

An isolated virtual network that is private. Signup and view all the answers

How does an Enhanced vSwitch (EVS) differ from an Open vSwitch (OVS)?

EVS enhances performance by utilizing user-mode processes. Signup and view all the answers

Which of the following is NOT a function of a virtual switch?

Requiring physical switches for operation Signup and view all the answers

What is a key characteristic of microservices architecture?

Applications are divided into independent, small units. Signup and view all the answers

What do containers utilize to run multiple applications on the same server?

A shared OS kernel. Signup and view all the answers

How do container images typically compare in size to VM images?

Container images are usually tens of MB or less. Signup and view all the answers

What role does the hypervisor play in virtualization?

It allows multiple VMs to run on a physical server. Signup and view all the answers

What is the main advantage of using containers over VMs?

Containers have a faster startup speed than VMs. Signup and view all the answers

What capabilities does Cloud Container Engine (CCE) provide?

Allows management of containerized applications. Signup and view all the answers

Which statement most accurately describes the resource utilization of containers?

Containers can run multiple instances per physical server. Signup and view all the answers

What is the main function of a container image?

To package the application and its dependencies. Signup and view all the answers

What protocol do object storage systems commonly use for data access over the Internet?

HTTP/HTTPS Signup and view all the answers

Which storage type is best suited for mission-critical applications requiring the lowest latency?

Block Storage Signup and view all the answers

What is a primary characteristic of file storage compared to object storage?

Hierarchical structure for data management Signup and view all the answers

Which protocol is primarily associated with file sharing between UNIX operating systems?

NFS Signup and view all the answers

What is the main advantage of object storage over file storage?

Large-scale data management capability Signup and view all the answers

Before a block storage device can be used, what must be done?

It must be formatted and a file system created. Signup and view all the answers

What latency level is associated with file storage?

Millisecond-level latency Signup and view all the answers

What happens to the search performance in file storage as the number of files increases?

It decreases dramatically. Signup and view all the answers

Study Notes

Virtualization vs. Cloud Computing

Virtualization converts physical hardware into virtual resources, serving as the backbone for cloud computing.
Cloud computing provides on-demand access to these virtualized resources via the Internet.
Key features of virtualization:
- Partitioning: Enables multiple VMs on a single server, optimizing resource allocation.
- Isolation: Faults in one VM do not affect others, enhancing system reliability.
- Encapsulation: VMs are stored as files, allowing easy migration.
- Independence: VMs can operate on different physical servers without modifications.

Important Virtualization Concepts

Hypervisor: Software layer that creates and manages VMs, with popular open-source types including Xen and KVM.
Guest OS: Operating system running inside the VM.
Host OS: Operating system on the physical server.
VM: Virtual machine, an abstraction of physical resources.

Computing Resources Overview

Computing involves a CPU, memory, disk, and network resources.
Microservices allow for applications to be isolated and independently managed, improving resource utilization.
Containers package application code and dependencies, are lightweight, require less memory and CPU, and can run multiple instances on the same server.
VMs simulate entire servers, including OS and applications, typically requiring tens of GBs.

HUAWEI CLOUD Container Services

Cloud Container Engine (CCE): High-performance service for managing containerized applications, integrating with Kubernetes.
CCE Turbo clusters: Utilize cloud-native infrastructure for enhanced computing performance.

Storage Types in Cloud Computing

Block Storage: Has low latency and is ideal for mission-critical applications, requiring formatting before use.
File Storage:
- NFS: Protocol for file sharing between UNIX systems, commonly used with Linux clients.
- CIFS: Protocol for remote file access, mainly for Windows clients.
Object Storage:
- Offers efficient large-scale data management with a flat structure for faster searches, using application-level APIs.

Networking and Security

Virtual Switches: Facilitate internal VM traffic, connect to external networks.
- Open vSwitch (OVS): Open-source virtual switch supporting various protocols, facilitating VM communication.
- Enhanced vSwitch (EVS): Improves performance by processing data in user mode.
- Distributed Virtual Switch (DVS): Functions like a physical switch, simplifying network architecture.

HUAWEI CLOUD Network and Storage Services

Virtual Private Cloud (VPC): An isolated virtual network that enhances security.
Elastic Volume Service (EVS): Persistent block storage with high availability and low latency.
Scalable File Service (SFS): NAS that offers scalable file storage, facilitating shared access across different compute resources.
Object Storage Service (OBS): Provides versatile and secure storage with REST APIs for any amount of unstructured data.

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Description

Explore the key differences between virtualization and cloud computing in this quiz. Understand how virtualization serves as the foundation for cloud technology and its impact on physical hardware. Test your knowledge and clarity on these essential concepts in IT.