Elastic Volume Service (EVS)

The Elastic Volume Service (EVS) delivers exceptionally robust block storage to Huawei Cloud servers, including Elastic Cloud Servers (ECSs) and Bare Metal Servers (BMSs). EVS ensures a durability rate of 99.9999999% and achieves ultra-low read/write latency, often within sub-millisecond ranges, catering to a wide array of vital applications.

Extremely Dependable

Distributed backend architecture, 3-copy redundancy, and 99.9999999% durability

Outstanding Performance

Up to 128,000 IOPS and 1,000 MB/s of throughput for a single EVS disk

Elastic Scalability

Up to 32 TB for a single EVS disk, and online disk capacity expansion

Security and Compliance

AES-256 encryption, secure and agile, with no application awareness

Select the appropriate vault type for your tasks.

Extreme SSD EVS Disk

  • Max. IOPS/disk: 128,000
  • Max. throughput/disk: 1,000 MB/s
  • Read/Write latency: sub-millisecond

Starting from $0.448 USD/GB-month

Ultra-high I/O EVS Disk

  • Max. IOPS/disk: 50,000
  • Max. throughput/disk: 350 MB/s
  • Read/Write latency: 1 ms

Starting from $0.154 USD/GB-month

General Purpose SSD EVS Disk

  • Max. IOPS/disk: 20,000
  • Max. throughput/disk: 250 MB/s
  • Read/Write latency: 1 ms

Starting from $0.094 USD/GB-month

High I/O EVS Disk

  • Max. IOPS/disk: 5,000
  • Max. throughput/disk: 150 MB/s
  • Read/Write latency: 1 ms to 3 ms

Starting from $0.054 USD/GB-month

Why EVS?


A Range of Disk Options

Choose from EVS disks with Extreme SSD, Ultra-high I/O, General Purpose SSD, or High I/O. Whatever your storage demands, there is always a great solution at a reasonable price.


Elastic Scalability

Increase block storage space, even if the disk is currently in use. In just a few clicks, you can scale a system disk up to 1 TB and a data disk up to 32 TB, all without any disruption to your workloads.


Robust Security and Availability

Data on EVS disks is encrypted using industry-standard AES-256 encryption. Three copies of data are automatically created and stored on different nodes to ensure your data is always available.


Backup and Restore

Create backups for your EVS disks, so if data is ever lost or damaged, you can create new EVS disks or restore to the state as of the backup.


Real-Time Monitoring

Monitor disk performance using the free Cloud Eye service, which reports alarms and notifies you by email or SMS so you can handle the issues in a timely manner.


Data Sharing

Set up a shared file system or a cluster management system to allow concurrent access to one shared EVS disk from up to 16 cloud servers. Shared EVS disks are ideal for running clustered or high-availability applications.