Elastic Block Storage

Elastic Block Storage (EBS) is a block-level data storage service provided for Kingsoft Cloud Elastic Compute (KEC) instances. It can be connected to any running KEC instance in the same data center. EBS 3.0 is the latest generation of block storage system independently developed by Kingsoft Cloud. It features high availability, high reliability, flexibility, ease of use, and elastic capacity expansion, and supports snapshots and custom images.
Product Comparison
Product Iteration
Quick Start


Elastic Expansion

Up to eight EBS volumes can be attached to a KEC instance, and the maximum capacity of an EBS volume is 32 TB.

Multiple Types

EBS provides EHDD volumes and SSD volumes to meet different performance requirements.

High Reliability

The triplicate storage architecture provides 99.9999999% data reliability.

High Performance

An SSD volume provides 30 random IOPS per GB, up to 25,000 IOPS, and 256 MB/s throughput. The latency of an SSD volume is less than 2 ms.

Data Backup

Local snapshots and normal snapshots are supported. Snapshot-based backup reduces the risk of data loss.

Product Comparison

SSD Volume
EHDD Volume
Applicable scenario
Scenarios that feature I/O-intensive and latency-sensitive core transaction workloads
High reliability and low-latency applications and business scenarios that require a balance between performance and costs
Typical scenario
Relational databases and NoSQL databases
Large- or medium-sized development and testing scenarios, web servers, and enterprise applications
Data reliability
Volume size
10 GB to 32 TB
10 GB to 32 TB
Maximum IOPS of a volume
Maximum throughput of a volume
256 MB/s
130 MB/s


Quick Creation

You can create KEC instances and purchase EBS volumes with a few simple operations.

Flexible Expansion

You can flexibly add, delete, or expand the capacity of EBS volumes to adapt to different business requirements.

Easy Management

You can manage EBS volumes by using the EBS console, API, or command line interface (CLI).


Snapshots are supported to avoid data loss due to accidental deletions, tampering, and virus attacks.


Enterprise Office Application

Development and Testing

NoSQL/Relational Databases

Enterprise Office Application

Applications such as CRM, OA, and email

Enterprise Office Application

EBS is loosely coupled with KEC for fast online and offline migration and business recovery. EBS offers a complete set of data backup, snapshot, and data recovery capabilities. It is applicable to high-load core business systems, and can meet the need of enterprises for elastic and reliable large-capacity block storage.

Development and Testing

You can use EBS to deploy the development and testing applications.

Development and Testing

You can use EBS to deploy the development and testing applications. We recommend that you use general-I/O EBS volumes to meet the development, testing, deployment, and O&M requirements.

NoSQL/Relational Databases

Databases such as Oracle, SQL Server, and MySQL

NoSQL/Relational Databases

With the high-performance NVMe SSD volumes and distributed architecture, EBS provides ultra-high performance and reliability for database applications to meet the requirements for low latency and high performance.

Product Iteration


Support Permanent Deletion

EBS volumes can be permanently deleted.
New Features

Create Data Disks from System Disk Snapshots

Data disks can be created from system disk snapshots.
New Features

Launch EBS 3.0 in Availability Zone A of the Russia Region

EBS 3.0 is launched in Availability Zone A of the Russia region.
New Zones/Regions

Automatically Attach Newly Purchased EBS Volumes to KEC Instances

EBS volumes can be attached to KEC instances when they are created.
New Features

Attach EBS Volumes to EPC Instances

EBS volumes can be attached to EPC instances.
New Features

Support Large-Capacity EBS Volumes

The maximum capacity of an EBS volume is increased to 32 TB.
New Features

Support Normal Snapshots

Snapshots can be stored in KS3 clusters.
New Features

Support Local Snapshots

Snapshots are stored in EBS clusters.
New Features