What Are the Differences Between SFS, OBS, and EVS?¶
Table 1 shows the 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. 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 |
Latency | SFS Capacity-Oriented file system:
General purpose file system: 10 ms SFS Turbo file system: 1 ms to 5 ms | 10 ms | 1 ms to 15 ms |
Bandwidth | GB/s | TB/s | MB/s |
Data sharing | Supported | Supported | Not supported |
Remote access | Supported | Supported | Not supported |
Online editing | Supported | Not supported | Supported |
Used independently | Supported | Supported | Not supported |