Elastic Volume Service


Elastic Volume Service (EVS) provides highly durable block storage for OREL Cloud servers such as Elastic Cloud Servers (ECSs). EVS offers 99.9999999% durability and as little as sub-millisecond read/write latency for a broad range of mission-critical applications.

Highly Reliable

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

Excellent Performance

Up to 5,000 IOPS and 150 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.

Why EVS?

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.

Use Cases

Technical Documentation

EVS User Guide

This document describes basic concepts, functions, key terms, and FAQs of EVS disks and provides instructions for quickly applying for and using EVS disks.

EVS API Reference

This document describes application programming interfaces (APIs) of Elastic Volume Service (EVS) and provides API parameter description and example values.

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