Elastic Volume Service Overview

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Questions and Answers

What is the primary purpose of the Elastic Volume Service (EVS)?

To increase the performance of local hard drives.

To provide real-time data backups and snapshots.

To enable distributed file systems without cloud resources.

To offer scalable block storage for cloud servers. (correct)

Which of the following accurately describes the advantages of EVS?

Data encryption is only available for data disks.

Real-time monitoring is only available for backups.

EVS disks can only be used as system disks.

EVS allows for on-demand capacity expansion without service interruption. (correct)

In what scenarios can EVS disks be utilized?

In distributed file systems, testing environments, and HPC. (correct)

Only for high-performance computing and data warehousing.

Only for system disk initialization in cloud servers.

As temporary storage solutions for local applications.

How does EVS ensure data security?

By supporting data encryption and providing backup features. Signup and view all the answers

What is required to utilize EVS disks for data storage?

They need to be attached to cloud servers. Signup and view all the answers

What is the maximum data durability provided by OBS?

99.9999999999% Signup and view all the answers

Which protocol is NOT supported by OBS for accessing data?

FTP Signup and view all the answers

What type of storage capacity does OBS provide?

Linear scaling in storage resources Signup and view all the answers

How does OBS ensure data security and protection?

Through versioning and server-side encryption Signup and view all the answers

How many objects can OBS handle while ensuring smooth concurrency?

100 billion objects Signup and view all the answers

Which of the following is a feature of OBS that enhances data access?

Optimized data access paths Signup and view all the answers

What certification has OBS passed to verify its trustworthy cloud services?

Trusted Cloud Service (TRUCS) Signup and view all the answers

Which of the following methods is NOT mentioned as a disaster recovery strategy for OBS?

Local file backups Signup and view all the answers

What are the two types of metadata in OBS?

System-defined and custom metadata Signup and view all the answers

What characterizes a bucket in OBS?

It is accessible over the Internet through its access domain name. Signup and view all the answers

Which of the following is NOT a feature of OBS for big data analytics?

Capacity expansion is always required Signup and view all the answers

What distinguishes an object in OBS?

It is identified by a key within a bucket. Signup and view all the answers

Which storage classes does OBS offer to reduce storage costs?

Standard, Infrequent Access, and Archive 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 what scenario is OBS particularly beneficial?

Analysis of numerous behavior logs with high performance Signup and view all the answers

Which billing options are available for using OBS?

Pay-per-use and yearly/monthly billing Signup and view all the answers

What is a key feature of OBS static website hosting?

It provides a cost-effective hosting solution. Signup and view all the answers

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

Dynamic data requests are sent to service systems for processing. Signup and view all the answers

What does the Enterprise Cloud Box (Web Disk) offer?

Inexpensive storage with high concurrency. Signup and view all the answers

Which function does OBS NOT provide?

Static data processing on user devices. Signup and view all the answers

What is the main advantage of OBS regarding storage needs?

Ability to hold massive amounts of data. Signup and view all the answers

What is a characteristic of the dynamic data requests in this system?

They are sent to service systems for processing before being returned. Signup and view all the answers

Which statement correctly describes how static data is accessed in the proposed system?

End users access static data through nearby high-speed nodes. Signup and view all the answers

Which feature is NOT associated with OBS in terms of storage management?

Manual data retrieval only. Signup and view all the answers

What is the primary advantage of using Synchronization Clients for backing up data?

Good for manual backup of a single database or program Signup and view all the answers

Which backup option is best suited for handling massive volume archiving?

DES Signup and view all the answers

How does Scalable File Service (SFS) enhance performance as storage capacity increases?

By increasing file system performance with capacity growth Signup and view all the answers

What is a key feature of the Scalable File Service in terms of file access?

File systems can be accessed concurrently by multiple servers across different regions Signup and view all the answers

What type of protocol does Scalable File Service support for data read and write operations?

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

Which scenario exemplifies an application of Scalable File Service?

High Performance Computing in simulation experiments Signup and view all the answers

What cost structure does Scalable File Service utilize?

Pay-per-use basis depending on storage consumption Signup and view all the answers

What functionality does Cloud Storage Gateway (CSG) provide?

Seamless compatibility with on-premises backup systems Signup and view all the answers

Which of the following services provided by TV stations and new media is most likely to be deployed on cloud platforms?

Transcoding Signup and view all the answers

What is the role of Dedicated SFS Turbo in enterprises?

To facilitate high-performance shared access Signup and view all the answers

Which protocol allows different operating systems to share data over a network?

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

What is the main advantage of using the Common Internet File System (CIFS)?

It allows applications to access files over the Internet. Signup and view all the answers

What does a file system provide in the context of SFS?

Remote access to network files. Signup and view all the answers

How do Dedicated resource pools benefit organizations when using SFS?

They are isolated from public resource pools. Signup and view all the answers

What is a primary function of the file system in a cloud environment?

Providing a shared storage service Signup and view all the answers

Which of the following statements best describes SFS Turbo file system capabilities?

SFS Turbo enhances performance for shared access solutions. Signup and view all the answers

Study Notes

Elastic Volume Service (EVS)

EVS offers scalable block storage for cloud servers
Disks are highly reliable and performant
Suitable for distributed file systems, development/testing, data warehouses, and HPC
Distributed file system (DFS) is a hierarchical file system
Resources not directly connected to local nodes
Connected via compute networks or logical partitions

EVS Advantages

Various disk types (data/system) for different needs
Elastic scalability: Expand capacity on demand without interrupting service
Real-time monitoring using Cloud Eye for disk health
High security and reliability via data encryption and backups/snapshots

EVS Architecture

EVS disks are like local hard drives, but on the cloud
Need to be attached to cloud servers for use
Can be initialized, file systems created, and used for persistent storage
Backups and snapshots available for data reliability

EVS Performance

IOPS (Input/Output Operations per Second): Measures read/write operations per second by an EVS disk

EVS Disk Types

Classified by I/O performance (Extreme SSD, Ultra-high I/O, General Purpose SSD, High I/O)

EVS Device Types

Virtual Block Device (VBD): Default EVS device type for basic read/write SCSI commands
Small Computer System Interface (SCSI): Supports transparent SCSI command transmission allowing server OS direct access to underlying storage.

Shared EVS Disks

Support concurrent read/write operations
Multiple attachments, high concurrency, high performance, and high reliability
Used for high-availability cluster deployments

EVS Encryption

Encryption available for EVS disks, especially important for data stored on EVS disks
System disks encrypted during server creation
Data disks can be encrypted separately

EVS Backup

Cloud Disk Backup offered by CBR for creating EVS disk backups while servers are running
Data integrity and security are guaranteed by use of backups.

EVS Snapshot

Enables creating snapshots of EVS disk data at specific time points
Can create new disks containing the snapshot data
Snapshots are different from backups
Backup copies to separate storage; snapshot copies to the same disk.
Relationship established between snapshot and disk data

EVS Backups vs. Snapshots

Backups are a copy of a disk stored in a different location
Snapshots are the disk state at a given time point and are stored on the same disk.
Deleting disks deletes the snapshot but not the backup.

EVS Three-Copy Redundancy

Data stored in three copies for data reliability
Copies on different nodes in the system for fault tolerance

Data Rebuild

If a device fails, the system automatically rebuilds data on other nodes
Using multiple nodes eliminates performance bottlenecks and minimizes disruption

Object Storage Service (OBS)

Scalable service for massive data storage
Secure, reliable, and cost-effective cloud storage
Unlimited storage capacity for various users; websites, enterprises, developers
Supports various APIs, consoles, and SDKs for easy management

OBS Advantages

Data durability and service continuity
Multi-level protection, authorization
High performance, 100 billion objects and 10 million operations
Easy use/management
Tiered storage, on-demand use

OBS Architecture

Consists of buckets and objects
Bucket is a container; objects are the fundamental storage unit
Each object has a key (name), and metadata (describing information) and data (content)

Application Scenarios

Big Data Analytics: mass data storage, query of historical data details, analysis of logs, analysis of public transactions
Static Website Hosting
Enterprise Cloud Boxes (Web Disks) enabling scalable storage

Scalable File Service (SFS)

High-performance shared file storage
Supports file sharing among multiple servers in different zones
Elastic scaling and superior performance/reliability
Seamless integration with NFS, broad compatibility with various applications
Easy management with low operating costs

SFS Application Scenarios

High-performance computing (HPC) including simulations, biopharma, gene sequencing, weather forecasting
Media processing, especially relevant for TV stations and new media services
Content management and web services providing storage for web directories, archives, and online releases

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Description

Explore the core functionalities of the Elastic Volume Service (EVS), including its scalable block storage solutions and various advantages like high performance and security. Learn about the architecture designed for persistent storage and how it integrates with cloud servers.