Updated on 2025-08-15 GMT+08:00

File System Types

SFS provides three types of file systems: SFS Capacity-Oriented, General Purpose File System, and SFS Turbo.

The following table describes the features, advantages, and application scenarios of these types of file systems.

Table 1 File system types

File System Type

Storage Class

Features

Highlights

Application Scenarios

SFS Capacity-Oriented

-

  • Maximum bandwidth: 2 GB/s; maximum IOPS: 2,000
  • Latency: 3 to 20 ms; maximum capacity: 4 PB
  • Delivers better performance and suitable for services that require large capacity and high bandwidth.
NOTE:
  • Latency refers to the minimum latency under low workload conditions. It is unstable.
  • Large files refer to files larger than 10 MB, and large I/Os refer to I/Os larger than 1 MB.
  • The performance of a file system is related to its capacity. The bandwidth is calculated using the following formula: Bandwidth of a file system = 0.02 MB/s x Capacity of the file system (GB) + 100 MB/s. The maximum bandwidth of a file system with 100 TB capacity is 2 GB/s. If a higher bandwidth is required, purchase a file system with larger capacity.

Large capacity, high bandwidth, and low cost

Cost-sensitive workloads which require large-capacity scalability, such as media processing, file sharing, high-performance computing, and data backup. For workloads dealing with massive small files, SFS Turbo is recommended.

General Purpose File System

-

  • Maximum bandwidth: 1.25 TB/s; maximum IOPS: million
  • Latency: about 10 ms; maximum capacity: EB
  • Delivers better performance and suitable for services that require large capacity and high bandwidth.

Large capacity, high bandwidth, and low cost

Cost-sensitive workloads which require large-capacity scalability, such as media processing, file sharing, high-performance computing, and data backup. For workloads dealing with massive small files, SFS Turbo is recommended.

SFS Turbo

Standard (supporting NFS only)

  • Maximum bandwidth: 150 MB/s; maximum IOPS: 5,000
  • Latency: 2 to 5 ms; maximum capacity: 32 TB
  • Suitable for services with massive small files and services that require low latency.
    NOTE:

    The performance of an SFS Turbo file system depends on the storage class. It is not affected by the file system capacity.

Low latency and tenant exclusive

Workloads dealing with massive small files, such as code storage, log storage, web services, and virtual desktop

Standard-Enhanced (supporting NFS only)

  • Maximum bandwidth: 1 GB/s; maximum IOPS: 15,000
  • Latency: 2 to 5 ms; maximum capacity: 320 TB
  • Enhanced bandwidth, IOPS, and capacity

Low latency, high bandwidth, and tenant exclusive

Workloads dealing with massive small files and those requiring high bandwidth, such as code storage, file sharing, enterprise office automation (OA), and log storage.

Performance (supporting NFS only)

  • Maximum bandwidth: 350 MB/s; maximum IOPS: 20,000
  • Latency: 1 to 3 ms; maximum capacity: 32 TB
  • Delivers better performance and suitable for services with massive small files and services that require low latency.

Low latency, high IOPS, and tenant exclusive

Workloads dealing with massive small files, and random I/O-intensive and latency-sensitive services, such as high-performance websites, file sharing, and content management

Performance-Enhanced (supporting NFS only)

  • Maximum bandwidth: 2 GB/s; maximum IOPS: 100,000
  • Latency: 1 to 3 ms; maximum capacity: 320 TB
  • Enhanced bandwidth, IOPS, and capacity

Low latency, high IOPS, high bandwidth, and tenant exclusive

Workloads dealing with massive small files, and latency-sensitive and bandwidth-demanding workloads, such as image rendering, AI training, and enterprise OA.

20 MB/s/TiB

  • Maximum bandwidth: 8 GB/s; maximum IOPS: 250,000
  • Latency: 2 to 5 ms; capacity: 3.6 TB to 1 PB

Large capacity and low cost

Enterprise OA and code repository management

40 MB/s/TiB

  • Maximum bandwidth: 8 GB/s; maximum IOPS: 250,000
  • Latency: 2 to 5 ms; capacity: 1.2 TB to 1 PB

Large capacity and low cost

Enterprise OA and code repository management

125 MB/s/TiB

  • Maximum bandwidth: 20 GB/s; maximum IOPS: 1 million
  • Latency: 1 to 3 ms; capacity: 1.2 TB to 1 PB

Low latency and cost effectiveness

AI training, EDA simulation, gene analysis, and video rendering

250 MB/s/TiB

  • Maximum bandwidth: 20 GB/s; maximum IOPS: 1 million
  • Latency: 1 to 3 ms; capacity: 1.2 TB to 1 PB

Low latency and high bandwidth

AI training, EDA simulation, gene analysis, and video rendering

500 MB/s/TiB

  • NFS protocol: maximum bandwidth: 80 GB/s; maximum IOPS: 1 million
  • CIFS protocol: maximum bandwidth: 65 GB/s; maximum IOPS: 3 million
  • Latency: 1 to 3 ms; capacity: 1.2 TB to 1 PB

Low latency and high-density performance

Autonomous driving, AI generated content, and EDA in chip design

1,000 MB/s/TiB

  • NFS protocol: maximum bandwidth: 80 GB/s; maximum IOPS: 1 million
  • CIFS protocol: maximum bandwidth: 65 GB/s; maximum IOPS: 3 million
  • Latency: 1 to 3 ms; capacity: 1.2 TB to 1 PB

Low latency and high-density performance

Autonomous driving, AI generated content, and EDA in chip design

The performance of an SFS Turbo file system is proportional to the purchased capacity. The higher the file system capacity, the higher the bandwidth. Based on the bandwidth provided by each 1 TB of capacity, SFS Turbo file systems are classified into the following types: 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, 250 MB/s/TiB, 500 MB/s/TiB, and 1,000 MB/s/TiB.

For example, if you buy a 250 MB/s/TiB file system with a capacity of 6 TB, the bandwidth that this file system can provide is 1,500 MB/s (250 x 6).

The minimum bandwidth of an SFS Turbo file system is 150 Mbit/s. If the calculated bandwidth is less than 150 Mbit/s, 150 Mbit/s will be used as the bandwidth of this file system. There will also be a maximum bandwidth for each type of SFS Turbo file systems. If the calculated bandwidth is greater than the maximum bandwidth, the maximum bandwidth will be used as the bandwidth of this file system.