Podcast
Questions and Answers
Elastic Volume Service (EVS) can only be used as a system disk for servers.
Elastic Volume Service (EVS) can only be used as a system disk for servers.
False
EVS disks require a direct physical connection to local nodes for access.
EVS disks require a direct physical connection to local nodes for access.
False
The Cloud Eye tool allows for real-time monitoring of EVS disk health.
The Cloud Eye tool allows for real-time monitoring of EVS disk health.
True
EVS provides data protection functions like backups and snapshots for improved data reliability.
EVS provides data protection functions like backups and snapshots for improved data reliability.
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Elastic scalability allows users to expand EVS capacity only during service interruptions.
Elastic scalability allows users to expand EVS capacity only during service interruptions.
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Data disk encryption can only occur when they are purchased along with servers.
Data disk encryption can only occur when they are purchased along with servers.
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EVS snapshots create a copy of the data on a different storage system.
EVS snapshots create a copy of the data on a different storage system.
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System disks cannot be purchased separately from servers.
System disks cannot be purchased separately from servers.
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Backups created for EVS disks can only be restored if the servers are not running.
Backups created for EVS disks can only be restored if the servers are not running.
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Creating a snapshot of a disk does not save the existing data as a separate copy.
Creating a snapshot of a disk does not save the existing data as a separate copy.
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Data loss from virus invasions cannot be mitigated using EVS backup solutions.
Data loss from virus invasions cannot be mitigated using EVS backup solutions.
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After creating a snapshot, data can be modified without affecting the snapshot's validity.
After creating a snapshot, data can be modified without affecting the snapshot's validity.
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Snapshots s1 and s2 for disk v1 are created before any data is written to the disk.
Snapshots s1 and s2 for disk v1 are created before any data is written to the disk.
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Backups are stored in the same disk as the original data.
Backups are stored in the same disk as the original data.
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A backup is a copy of a disk taken at a specific point in time.
A backup is a copy of a disk taken at a specific point in time.
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If a disk is deleted, its backups will also be deleted.
If a disk is deleted, its backups will also be deleted.
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Snapshots are stored in a different location from their source disk.
Snapshots are stored in a different location from their source disk.
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Restoration from backups can create new disks from the backups.
Restoration from backups can create new disks from the backups.
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Deleting a snapshot will not affect the original disk it is associated with.
Deleting a snapshot will not affect the original disk it is associated with.
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Manual backup policies are not needed for automatic backup performance.
Manual backup policies are not needed for automatic backup performance.
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Snapshots of data disks are automatically deleted when changing the server operating system.
Snapshots of data disks are automatically deleted when changing the server operating system.
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OBS offers unlimited storage capacity for objects of any format.
OBS offers unlimited storage capacity for objects of any format.
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A single bucket in the OBS system can have restrictions on the number of objects that can be stored.
A single bucket in the OBS system can have restrictions on the number of objects that can be stored.
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OBS ensures data durability of up to 99.9999999999% and service continuity of 99.995%.
OBS ensures data durability of up to 99.9999999999% and service continuity of 99.995%.
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The Trusted Cloud Service (TRUCS) certification indicates that OBS has not implemented any security measures.
The Trusted Cloud Service (TRUCS) certification indicates that OBS has not implemented any security measures.
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OBS can support hundreds of billions of objects and maintain high concurrency without performance issues.
OBS can support hundreds of billions of objects and maintain high concurrency without performance issues.
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Users need to plan storage capacity beforehand when using OBS.
Users need to plan storage capacity beforehand when using OBS.
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OBS provides REST APIs and SDKs in various programming languages for user convenience.
OBS provides REST APIs and SDKs in various programming languages for user convenience.
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Data stored in OBS requires constant physical maintenance to ensure its availability.
Data stored in OBS requires constant physical maintenance to ensure its availability.
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Synchronization clients are suitable for backing up large volumes of data automatically.
Synchronization clients are suitable for backing up large volumes of data automatically.
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OBS allows for automatic transitions of objects between different storage classes based on lifecycle rules.
OBS allows for automatic transitions of objects between different storage classes based on lifecycle rules.
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Scalable File Service (SFS) supports integration with the Network File System (NFS).
Scalable File Service (SFS) supports integration with the Network File System (NFS).
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High Performance Computing (HPC) industries do not benefit from the capabilities provided by SFS.
High Performance Computing (HPC) industries do not benefit from the capabilities provided by SFS.
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The Scalable File Service (SFS) can only provide storage that is fixed and cannot be resized.
The Scalable File Service (SFS) can only provide storage that is fixed and cannot be resized.
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CSG is designed for seamless compatibility with on-premises backup systems.
CSG is designed for seamless compatibility with on-premises backup systems.
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SFS charges users a flat rate regardless of storage usage.
SFS charges users a flat rate regardless of storage usage.
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DES is primarily used for backing up data in real-time with minimal latency.
DES is primarily used for backing up data in real-time with minimal latency.
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Cloud platforms are less likely to be used for TV station services than in the past.
Cloud platforms are less likely to be used for TV station services than in the past.
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The trending formats in the broadcasting industry include HD and 4K videos.
The trending formats in the broadcasting industry include HD and 4K videos.
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SFS Turbo file systems are mainly used for sole personal storage needs.
SFS Turbo file systems are mainly used for sole personal storage needs.
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Network File System (NFS) enables different operating systems to share data over a network.
Network File System (NFS) enables different operating systems to share data over a network.
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CIFS stands for Common Internet File System, which is a proprietary version of the Server Message Block protocol.
CIFS stands for Common Internet File System, which is a proprietary version of the Server Message Block protocol.
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Dedicated resource pools in cloud services are shared with public pools.
Dedicated resource pools in cloud services are shared with public pools.
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The CIFS protocol allows applications to access files on computers over the Internet.
The CIFS protocol allows applications to access files on computers over the Internet.
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File systems can be mounted to multiple ECSs after creating a mount point on a management console.
File systems can be mounted to multiple ECSs after creating a mount point on a management console.
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Study Notes
Storage Cloud Services
- Elastic Volume Service (EVS) provides scalable block storage for cloud servers
- EVS disks are reliable and offer excellent performance
- EVS disks are used in distributed file systems, development/testing, data warehousing, and HPC environments
- EVS supports various disk types for different needs and budgets
- EVS offers elastic scalability, expanding capacity on-demand without interruptions
- Real-time monitoring is available using Cloud Eye
- EVS has high security and reliability with data encryption and backups/snapshots to safeguard data
EVS Architecture
- EVS disks are like local hard drives in the cloud
- Disks need to be attached to cloud servers before use
- EVS disks can be initialized, file systems created, and used for persistent storage
- Backups and snapshots improve data reliability
EVS Performance and Disk Types
- IOPS (Input/Output Operations per Second): Number of read/write operations per second by an EVS disk
- EVS disk types are classified by I/O performance: Extreme SSD, Ultra-high I/O, General Purpose SSD, High I/O
- EVS devices are Virtual Block Devices (VBD)
- VBD support basic read/write SCSI commands
- Shared EVS disks support concurrent read/write operations and high concurrency, high performance, and high reliability
- Multiple servers can access the same shared disk simultaneously for high availability (HA)
EVS Encryption
- System disks are encrypted during server creation; data disks can be encrypted separately
- EVS encrypts stored data on disks when required
EVS Backup
- Cloud Disk Backup is provided by Cloud Backup and Recovery (CBR) to back up EVS disks while servers are running
- Backups safeguard data integrity and security from various data loss issues or damage
EVS Snapshot
- Snapshots rapidly save disk data at specified times
- Snapshots can be used to create new disks containing snapshot data
- Snapshots establish a relationship between snapshot and disk data, unlike backups which create separate copies
- Snapshots of data disks can be used as usual
Differences Between EVS Backups and EVS Snapshots
- Backups store data in OBS (Object Storage Bucket) instead of disks, ensuring data restoration on disk issues
- Snapshots reflect the disk state at any given point in time, stored on the same disk as the original data
- Snapshots are deleted when the disk is deleted; Backups remain unaffected by disk deletion
EVS Three-Copy Redundancy
- The storage system protects data by storing copies on different disks of different servers
- Data copies are distributed to prevent single point of failure
- The system ensures strong consistency between the data copies
Data Rebuild
- Data copies are scattered across nodes in the system
- If a physical server or disk fails, the storage system automatically rebuilds data concurrently on different nodes
- This avoids large amounts of data being rebuilt on a single node, maximizing performance during data restore
Object Storage Service (OBS)
- OBS is a scalable service for massive amounts of data storage
- Provides secure, reliable, and cost-effective storage for variety of users
- OBS supports various storage classes
Application Scenarios
- OBS is suitable for Big Data Analytics (mass data storage and analysis, querying historical data, analyzing behavior logs, and statistical analysis of public transactions)
- OBS is suitable for Static Website Hosting (cost-effective, highly available hosting of websites and applications )
- OBS is suitable for Enterprise Cloud Boxes (web disks for enterprises for reliability, low latency, and high concurrency)
Scalable File Service
- SFS is a high-performance shared file storage service, supporting file sharing across multiple servers
- Enables elastic scaling, high performance and high reliability
- SFS supports standard protocols like NFS for integrations with various applications
Media Processing
- SFS is tailored for services like TV stations and new media for use in content production, broadcasting, and distribution
- Used for content sharing and related file management requirements
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Description
Explore the features and architecture of Elastic Volume Service (EVS) in this quiz. Learn about its performance metrics, various disk types, and the security measures in place for data protection. Test your knowledge on how EVS integrates with cloud servers and supports scalable storage solutions.
