Cloud Storage Services Overview

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Questions and Answers

What is the data durability percentage that OBS provides?

99.9999999999% (correct)

99.99%

99.5%

99.995%

Which protocol does OBS support for accessing its services?

FTP

TCP/IP

SFTP

HTTP and HTTPS (correct)

What certification has OBS passed to ensure trust and security?

TRUCS (correct)

SOC 2

NIST

ISO 9001

What is one of the technologies used by OBS for disaster recovery?

Cross-region replication Signup and view all the answers

What level of concurrency can OBS handle?

10 million Signup and view all the answers

Which feature of OBS allows for the secure management of user access?

URL validation Signup and view all the answers

What is a major advantage of using OBS for storage?

Infinitely scalable resources Signup and view all the answers

How does OBS facilitate data migration to the cloud?

With data migration tools and SDKs Signup and view all the answers

What does IOPS stand for in the context of EVS performance metrics?

Input/Output Operations per Second Signup and view all the answers

Which type of EVS disk is designed for ultra-high bandwidth and ultra-low latency?

Extreme SSD Signup and view all the answers

What is the main purpose of Shared EVS Disks?

To provide high reliability and allow multiple servers access Signup and view all the answers

How do General Purpose SSD disks compare to other EVS disk types?

They are cost-effective with medium performance requirements Signup and view all the answers

What characterizes Virtual Block Device (VBD) EVS disks?

They are the default EVS device type with basic SCSI support Signup and view all the answers

Which performance metric indicates the amount of data read from and written to an EVS disk per second?

Throughput Signup and view all the answers

What is a primary benefit of using SCSI EVS disks compared to VBD disks?

They support advanced SCSI commands for better performance Signup and view all the answers

Which EVS disk type is suitable for workloads that require high throughput and low latency, particularly in enterprise services?

Ultra-high I/O Signup and view all the answers

What is the primary purpose of a bucket in OBS?

To store objects in a container Signup and view all the answers

Which of the following is NOT a type of metadata associated with objects in OBS?

Access permissions metadata Signup and view all the answers

How is data charged in OBS's Standard, Infrequent Access, and Archive storage classes?

Separately metered and charged Signup and view all the answers

What is the maximum length of an object key in OBS?

1,024 characters Signup and view all the answers

In which application scenario would OBS be most beneficial?

Big data analytics with mass data storage Signup and view all the answers

What does 'infrequent access' storage class in OBS primarily targeting?

Data that is rarely accessed but must be stored Signup and view all the answers

Which of the following is an example of system-defined metadata in OBS?

Last-Modified date Signup and view all the answers

What benefit does the tiered storage option in OBS provide?

Reduced storage costs through separate metering Signup and view all the answers

What differentiates a backup from a snapshot regarding storage location?

Backups are stored in a different location than the original data, while snapshots are stored on the same disk. Signup and view all the answers

Which statement accurately describes the relationship between backups and their source disks?

Backups can restore services to original disks or create new disks from backups. Signup and view all the answers

What occurs if you delete a disk that has snapshots?

The snapshots and the original disk are both deleted. Signup and view all the answers

How can snapshots be beneficial after changing the server operating system?

They can be used to roll back the original OS if needed. Signup and view all the answers

What happens to a snapshot when its associated disk is deleted?

The snapshot is automatically deleted along with the disk. Signup and view all the answers

In what scenario can a backup be automatically generated?

Based on predefined backup policies. Signup and view all the answers

Which of the following statements about EVS backups is true?

Backups enhance data reliability by being stored separately from the original data. Signup and view all the answers

What is a key feature of EVS snapshots?

Snapshots can be used to revert a disk to a previous state. Signup and view all the answers

What is the main function of OBS in website hosting?

To provide a scalable solution for static content storage. Signup and view all the answers

How does dynamic data interact with the service systems in Huawei Cloud?

It is processed and then returned to end users. Signup and view all the answers

What advantage does the lifecycle management function of OBS provide?

It automatically changes storage classes to reduce costs. Signup and view all the answers

What type of data does OBS primarily handle?

Static data for enterprise applications. Signup and view all the answers

What capacity does OBS provide as part of its enterprise web disk service?

Reliable storage with low latency and high concurrency. Signup and view all the answers

How do end users request static data from OBS?

Via high-speed nodes close to their location. Signup and view all the answers

What is the primary purpose of OBS’s backup and archive feature?

To provide an inexpensive storage solution for massive data. Signup and view all the answers

What is one of the key characteristics of the storage capacity offered by OBS?

It automatically scales with growing data volume. Signup and view all the answers

Which service is more likely to be deployed on cloud platforms by TV stations and new media?

Transcoding Signup and view all the answers

What does SFS Turbo provide for high-performance shared access?

Dedicated file storage Signup and view all the answers

Which protocol is a public version of the Server Message Block (SMB) protocol?

Common Internet File System (CIFS) Signup and view all the answers

What allows different computers and operating systems to share data over a network?

Network File System (NFS) Signup and view all the answers

What is a requirement for effective file sharing in a networked environment involving various operating systems?

Standard POSIX access Signup and view all the answers

What is a notable trend in the broadcasting and TV industry related to video quality?

HD/4K videos Signup and view all the answers

What type of resource pools does dedicated SFS Turbo provide?

Dedicated compute and storage pools Signup and view all the answers

What must be created to access the file system remotely after mounting?

A mount point Signup and view all the answers

Study Notes

Storage Cloud Services (EVS)

EVS offers scalable block storage for cloud servers, high reliability, and excellent performance.
Suitable for distributed file systems, development/testing, data warehouses, and HPC.
Distributed file system (DFS) is a hierarchical file system where physical storage may not be directly connected to local nodes, but connected through compute networks.
EVS disks support various types, including data disks and system disks, allowing selection based on budget and requirements.
Scalable capacity on-demand without service interruption.
Real-time monitoring of disk health with Cloud Eye.
High security and reliability assured by data encryption and backup/snapshot features.

EVS Architecture

EVS disks are analogous to local hard drives but in the cloud; they require attachment to cloud servers for use.
EVS disks can be initialized to create file systems for persistent data storage.
Backups and snapshots are available to enhance data reliability.

EVS Performance and Disk Types

IOPS (Input/Output Operations per Second): Measures read/write operations per second on an EVS disk.
Performance classifications include Extreme SSD, Ultra-high I/O, General Purpose SSD, and High I/O based on I/O performance characteristics.
EVS supports Virtual Block Device (VBD) as the default type for basic read/write operations.
Small Computer System Interface (SCSI) support allows direct server OS access to underlying storage media, with additional advanced SCSI commands.
Shared EVS disks enable concurrent read/write operations, multiple attachments, high concurrency, high performance, and high reliability, ideal for HA deployments where multiple servers access the same disk.

EVS Encryption

Encryption functionality is available for EVS disks to secure stored data.
System disks are encrypted during server creation; data disks can be encrypted separately.

EVS Backup

Cloud Backup and Recovery (CBR) allows backups during server operation.
Provides data integrity and security through restoration from backups if accidents or errors occur.

EVS Snapshot

Enables rapid disk data saving at specified time points.
Snapshots create new disks populated with snapshot data at the beginning.
Snapshots differ from backups, as snapshots establish a relationship with the disk data, whereas backups are separate copies.

Differences Between EVS Backups and EVS Snapshots

Backups are stored in OBS and not on disks ensuring data recovery even with disk damage.
Snapshots create a copy on the same disk and are deleted if the disk is deleted.

EVS Three-Copy Redundancy

The backend storage system implements a three-copy redundancy mechanism for data reliability.
Data blocks are replicated and stored on different nodes preventing service disruptions due to physical device failures.
The method guarantees strong consistency between copies by spreading data copies across physical disks of several servers.

Data Rebuild

Data copies are scattered across the storage system.
If a physical device fails, the system automatically identifies and rebuilds necessary data concurrently on multiple nodes to minimize disruptions.
Rebuilding occurs on alternative physical disks to protect service continuity.

Object Storage Service (OBS)

OBS is a scalable, secure, reliable, and cost-effective cloud storage solution for massive amounts of data.
Offers unlimited storage, supporting various users, applications, and data formats.
Supports data analysis and query needs, e.g., historical data, analytics of user behavior logs, etc.

Static Website Hosting

Obs facilitates cost-effective, highly available, and scalable website hosting through combining OBS with CDN and ECS.
Static and dynamic content can be combined for optimal website performance.

Enterprise Cloud Boxes (Web Disks)

OBS integrates with cloud services (e.g., ECS, ELB, RDS, VBS) to provide reliable, high concurrency, and cost-effective enterprise web disks.
Storage capacity scales automatically as data grows.

Media Processing

Cloud-based media processing such as streaming media, Archiving, editing, and transcoding, can be facilitated with SFS.
Shared File Systems support file sharing and seamless integration with various operating systems and applications.
SFS provides scalable file storage, high-performance, and support for shared file access for different operating systems in the cloud.

SFS supports file sharing across multiple availability zones, enabling simultaneous shared access for various applications and systems like enterprise office documents or general file storage.
Shared file storage in the cloud is supported by SFS via protocols such as NFS and CIFS, allowing for seamless integration and compatibility.

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Description

This quiz provides an overview of EVS block storage services, including features, architecture, and application use cases. Learn about the advantages of scalable storage solutions, data encryption, and monitoring tools in cloud environments.