Elastic Volume Service Video

Elastic Volume Service (EVS) is a virtual block storage service, which provides block storage space for Elastic Cloud Servers (ECSs) and Bare Metal Servers (BMSs). You can create EVS disks on the console and attach them to ECSs. The method for using EVS disks is the same as that for using hard disks on physical servers. EVS disks have higher data reliability and I/O throughput and are easier to use. EVS disks are suitable for file systems, databases, or system software or applications that require block storage devices.

High Reliability

Three copies of data ensure data security, as well as 99.99999% availability and durability.

High Performance

All Flash Array (AFA) storage is supported. EVS disks provide a maximum of 8000 IOPS/TB and a latency smaller than 1 ms. You can choose between EVS disks with different performance as required.

Flexibility

EVS provides ultra-large block storage (max. 64 TB per disk), dynamic online capacity expansion, and pay-per-use option.

Rich Features

Shared EVS disks, passthrough disks, snapshots, and Volume Backup Service (VBS) are supported, meeting different service requirements.

Application Scenarios

  • NoSQL/Relational Databases

  • Data Warehouses

  • Enterprise Office Applications

  • Development & Test Environments

NoSQL/Relational Databases

NoSQL/Relational Databases

The service core database needs to support massive access at traffic peaks, and requires disks with persistent and stable high performance and low latency. You can use the disk type with ultra-high performance to implement a combination of excellent performance and superior reliability, meeting the high requirements on low latency and high I/O performance in data-intensive scenarios, such as NoSQL and relational databases.

Advantages

  • Access latency < 1 ms; up to 8000 IOPS per disk

  • Performance density: 2000 IOPS/TB to 20000 IOPS/TB

  • Up to 64 TB per disk

Related Services

ECS

EVS

BMS

VBS

Data Warehouses

Data Warehouses

Applies to read-intensive applications such as Oracle RAC and SAP HANA. Ultra-high I/O EVS disks meet low latency and extremely high throughput and read/write speed requirements.

Advantages

  • Access latency: 1 ms to 3 ms

  • Performance density: 500 IOPS/TB to 4000 IOPS/TB

  • Up to 64 TB per disk

Related Services

ECS

EVS

VPC

Enterprise Office Applications

Enterprise Office Applications

Applies to enterprise office applications such as SAP, Microsoft Exchange, and Microsoft SharePoint. These scenarios, such as common databases, application VMs, and middleware VMs, require relatively low performance but rich enterprise-class features. It is recommended that you use the disk type with medium performance.

Advantages

  • Access latency: 3 ms to 10 ms

  • Performance density: 250 IOPS/TB to 1000 IOPS/TB

  • Up to 64 TB per disk

Related Services

ECS

EVS

VBS

Development & Test Environments

Development & Test Environments

Applies to scenarios with development and test applications deployed. It is recommended that you use the disk type with common performance to meet the requirements of development, test, deployment, and O&M.

Advantages

  • Access latency: 10 ms to 20 ms

  • Performance density: 5 IOPS/TB to 25 IOPS/TB

  • Up to 64 TB per disk

Related Services

ECS

EVS

VBS

Functions

Rich Specifications

EVS provides common I/O, medium I/O, high I/O, and ultra-high I/O disk types to meet different service requirements.

  • Common I/O EVS disks

    Suitable for scenarios that feature few transactions and require large capacity and normal read/write speed, such as development and test environments.

  • Medium I/O EVS disks

    Suitable for scenarios that require common performance but rich enterprise-class features, such as common databases, application VMs, and middleware VMs.

  • High I/O EVS disks

    Suitable for scenarios that require high performance, fast read and write speed, and large throughput, such as data warehouses.

  • Ultra-high I/O EVS disks

    Suitable for intensive read/write scenarios that require extremely high performance and read/write speed, and low latency, such as NoSQL/relational databases.

Elastic Scalability

One EVS disk can be expanded to up to 64 TB in 1 GB increments.

  • On-demand capacity expansion

    Each EVS disk has an initial capacity of 10 GB, and can be expanded in 1 GB increments.

  • Linear performance scaling

    Linear performance scaling can be achieved with capacity expansion.

Security and Reliability

Distributed storage with multiple data copies ensures reliability and protection of data. VBS and snapshots ensure protection of local and remote data.

  • Three copies of data

    Distributed storage with three data copies ensures data durability of 99.99999%.

  • VBS

    You can create EVS disk backups. The backups can be used to roll back EVS disks, maximizing user data accuracy and security and ensuring service availability.

  • Snapshots

    You can back up your data by taking a snapshot of disk data at a specific time. If data loss occurs due to tampering or misdeletion or a service fault occurs, you can use snapshots to roll back risks.

Getting Started

  • Apply for EVS Disk

  • Attach EVS Disk

  • Initialize Data Disk

Apply for EVS Disk

Steps

1. Log in to the ManageOne operation plane and choose Storage > Elastic Volume Service.

2. Click Apply Disk.

3. Select a product.

4. Select an availability zone, and set disk parameters.

5. Apply for the EVS disk.

Attach EVS Disk

Steps

1. Select the EVS disk to be attached.

2. Locate the row that contains this disk, and click Attach in the Operation column.Attach the EVS disk as prompted.

Initialize Data Disk

Steps

1. Log in to the ECS.

2. For the Windows OS, go to the Disk Management window. For the Linux OS, start the partitioning tool.

3. Select a partitioning mode.

4. Create partitions and file systems, and format the disk.

Video Tutorials

Expanding the Capacity of an EVS Disk

Applying for and Using an EVS Disk

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