Elastic Volume Service (EVS)

Elastic Volume Service (EVS) is a scalable virtual block storage service that is based on a distributed architecture. EVS features robust data reliability and high I/O throughput. In a similar way for traditional hard disks on servers, you can format EVS disks that are attached to Elastic Cloud Servers (ECSs), create file systems on EVS disks, and store data into them persistently.

Starting from ¥0.30 /GB/month

Advantages

EVS Disks

Traditional SAN Storage

Robust Reliability

EVS Disks: Data backup with 3 copies, for a data durability of 99.99999%.

Traditional SAN Storage: 99.9% data persistence

High Performance

EVS Disks: An EVS disk can reach a maximum of 20000 IOPS and 350 MB/s throughput, and you can choose EVS disks with different performance based on service needs.

Traditional SAN Storage: A whole set of high-end SAN storage must be purchased at a time, incurring higher costs with the same performance provided.

Massive Capacity

EVS Disks: Ultra-large block storage devices that support elastic expansion and pay-on-use, and are cost-effective, with up to 32 TB in an EVS disk and up to 24 EVS disks in an ECS.

Traditional SAN Storage: A whole set of high-end SAN storage must be purchased at a time for expansion, resulting in resource waste in the early phase and expansion difficulty later.

Rich Specifications

EVS Disks: Three EVS disk types by I/O performance, common I/O, high I/O, and ultra-high I/O, to meet different service requirements.

Traditional SAN Storage: Specifications are fixed, and you need to upgrade the devices or purchase new devices for new specifications.

Easy-to-use

EVS Disks: EVS disks are easy-to-use and do not require high skills for operators.

Traditional SAN Storage: Operators of traditional SAN storage must have high professional knowledge, such as LUNs, initiators, and mapping, and operations are complex.

Architecture

EVS Disks

  • Users can attach EVS disks to ECSs and expand EVS disk capacities.
  • Users can back up and restore the EVS disk data using Volume Backup Service (VBS), and use an EVS disk backup to create another EVS disk.
  • Cloud Eye (CES) monitors read/write requests and rates of EVS disks to monitor EVS disk performance in real time.

Application Scenarios

  • NoSQL/RDS

  • Enterprise Office Applications

  • Data Warehouses

  • Distributed File Systems

NoSQL/RDS

Application Scenarios

NoSQL/RDS

Characteristics

  • Ultra-high I/O EVS disks use resources provided by solid state disks (SSDs). These EVS disks are of high-performance, low power consumption, meeting the high I/O and low latency requirements for NoSQL and relational databases. They apply to data-intensive scenarios that require high-performance and high data read/write rates.

Recommended Configuration

ECS EVS VPC

Enterprise Office Applications

Application Scenarios

Enterprise Office Applications

Characteristics

  • Common I/O EVS disks use resources provided by Serial Advanced Technology Attachment (SATA) disks. These EVS disks are secure, reliable, and scalable, meeting the data integrity and protection requirements for large-capacity enterprise office usage. They apply to scenarios that require large-capacity, relative low data read/write rates, and less amount of to-be-processed data.

Recommended configuration

ECS EVS VPC

Data Warehouses

Application Scenarios

Data Warehouses

Characteristics

  • Ultra-high I/O EVS disks use resources provided by SSDs. These EVS disks have high bandwidth and high throughput and can rapidly store data and efficiently lower data security risks. They apply to data-intensive applications and data warehouses, such as Oracle RAC and SAP HANA data warehouses.

Recommended configuration

ECS EVS VPC

Distributed File Systems

Application Scenarios

Distributed File Systems

Characteristics

  • High I/O EVS disks use resources provided by serial attached SCSI (SAS) disks. These EVS disks apply to various servers, have high performance, high scalability, and high reliability, and support distributed file systems as well as distributed file sharing, meeting requirements for safely storing files and applications. They apply to real-time data storage scenarios that require relative high performance and high data read/write rates.

Recommended configuration

ECS EVS VPC

Function Description

Multiple storage options for various application scenarios

Three EVS disk types by performance options: common I/O, high I/O, and ultra-high I/O.

Flexibly scalable to offer desired disk capacity

Up to 32 TB in an EVS disk and up to 24 EVS disks in an ECS.

3-copy storage with a data reliability of 99.99999%

Distributed storage technology with multiple data copies against data losses.

Backup and restoration against data losses due to mis-deletion and tampering

EVS disk data backup and restoration at any point in time.

Real-time cloud monitoring to learn disk health status

Real-time monitoring of EVS disk read/write speeds and throughput.

Registration