Help Center/ Scalable File Service/ FAQs/ Concepts/ What Are the Differences Between SFS, OBS, and EVS?
Updated on 2024-06-27 GMT+08:00
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What Are the Differences Between SFS, OBS, and EVS?

Table 1 shows the comparison between SFS, OBS, and EVS.

Table 1 Comparison between SFS, OBS, and EVS

Dimension

SFS

OBS

EVS

Concept

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

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 and high performance to meet various service requirements. An EVS disk is similar to a hard disk on a PC.

Data storage logic

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

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 directly store files. To store files, you need to format the file system first.

Access method

SFS file systems can be accessed only after being mounted to ECSs or BMSs through NFS or CIFS. A network address must be specified or mapped to a local directory for access.

OBS buckets can be accessed through the Internet or Direct Connect. The bucket address must be specified for access, and transmission protocols HTTP and HTTPS are used.

EVS disks can be used and accessed from applications only after being attached to ECSs or BMSs and initialized.

Application Scenario

Gene sequencing, image rendering, media processing, file sharing, content management, and web services

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

Industrial design, energy exploration, critical clustered applications, enterprise application systems, and development and testing

Capacity

PB-scale

EB-scale

TB-scale

Latency

3–10 ms

10 ms

Sub-millisecond level

IOPS/TPS

10,000 for a single file system

Tens of millions

128,000 for a single disk

Bandwidth

GB/s

TB/s

MB/s

Data sharing

Supported

Supported

Supported

Remote access

Supported

Supported

Not supported

Online editing

Supported

Not supported

Supported

Used independently

Supported

Supported

No (EVS disks can only be used after being attached to ECSs.)
Parent topic: Concepts