Help Center/ Object Storage Service/ FAQs/ OBS Basics/ What Are the Differences Between OBS, EVS, and SFS?
Updated on 2024-10-15 GMT+08:00
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What Are the Differences Between OBS, EVS, and SFS?

Table 1 compares OBS, EVS, and SFS.

Table 1 Comparison between OBS, EVS, and SFS

Dimension

OBS

EVS

SFS

Concept

OBS provides massive, secure, reliable, and cost-effective data storage for users to store data of any type and size.

EVS provides scalable block storage that features high reliability, high performance, and robust specifications for ECSs to meet service requirements in different scenarios. An EVS disk is similar to a hard disk on a PC.

SFS provides on-demand high-performance file storage, which can be shared by multiple ECSs. SFS is similar to a remote directory for a Windows or Linux machine.

Data storage logic

Stores objects. Files can be stored directly to OBS. The files automatically generate corresponding system metadata. You can also customize the metadata if needed.

Stores binary data and cannot store files directly. To store files on an EVS disk, you need to format the file system first.

Stores files. Data is sorted and displayed in files and folders.

Access mode

You can access OBS over the Internet or using Direct Connect. Just specify the bucket address and use a transmission protocol, for example, HTTP or HTTPS.

EVS disks need to be attached to an ECS or a BMS and initialized before the ECS or BMS can be used and accessed by your applications.

SFS systems need to be mounted to an ECS or a BMS and then the ECS or BMS can be accessed using NFS or CIFS protocols. A network address must be specified or mapped to a local directory for access.

Application scenario

Big data analysis, static website hosting, online video on demand (VoD), gene sequencing, and intelligent video surveillance

HPC, enterprise core cluster applications, enterprise application systems, and development and testing

NOTE:

HPC: High-speed and high-IOPS storage is required, such as industrial design and energy exploration.

High-performance computing (HPC), media processing, file sharing, content management, and web services

NOTE:

HPC: High bandwidth is required for shared file storage, such as gene sequencing and image rendering.

Capacity

Exabytes

Terabytes

Petabytes

Latency

Milliseconds

1 to 2 ms

3 to 10 ms

IOPS/TPS

Tens of millions

128,000 for a single disk

10,000 for a single file system

Bandwidth

TB/s

MB/s

GB/s

Data sharing supported

Yes

Yes

Yes

Remote access supported

Yes

No

Yes

Online editing supported

No

Yes

Yes

Used independently

Yes

No

Yes

Dedicated Enterprise Storage Service (DESS) provides out-of-the-box dedicated storage services with the same performance and reliability as that in private cloud environments. It is ideal for enterprises' mission-critical applications such as Oracle RAC and SAP HANA TDI. For more information about DESS, see DESS Introduction.

Dedicated Distributed Storage Service (DSS) provides dedicated physical storage resources. It features high availability, durability, and low latency, based on technologies such as data redundancy and cache acceleration. For more information about DSS, see What Is Dedicated Distributed Storage Service?

Parent topic: OBS Basics