File System Types

This section describes the features, highlights, and application scenarios of different types of SFS Turbo file systems.

**Table 1** SFS Turbo file systems
Parameter	20 MB/s/TiB	40 MB/s/TiB	125 MB/s/TiB	250 MB/s/TiB	500 MB/s/TiB	1,000 MB/s/TiB
Max. bandwidth	8 GB/s	8 GB/s	20 GB/s	20 GB/s	80 GB/s	80 GB/s
Max. IOPS	250,000	250,000	1 million	1 million	1 million	1 million
Single-queue, 4 KiB latency	2–5 ms	2–5 ms	1–3 ms	1–3 ms	1–3 ms	1–3 ms
Capacity	3.6 TB to 1 PB	1.2 TB to 1 PB	1.2 TB to 1 PB	1.2 TB to 1 PB	1.2 TB to 1 PB	1.2 TB to 1 PB
Medium Type	HDD	HDD	SSD	SSD	ESSD	ESSD
Highlights	Large capacity and low cost	Large capacity and low cost	Low latency and cost effectiveness	Low latency and cost effectiveness	High IOPS and high-density performance	High IOPS and high-density performance
Typical use cases	Log storage, file sharing, content management, and websites	Log storage, file sharing, content management, and websites	AI training, autonomous driving, EDA simulation, rendering, enterprise NAS, and HPC web applications	AI training, autonomous driving, EDA simulation, rendering, enterprise NAS, and HPC web applications	Large-scale AI training, AI models, and AI generated content	Large-scale AI training, AI models, and AI generated content

**Table 2** Previous-generation SFS Turbo file systems
Parameter	Standard	Standard-Enhanced (Discontinued)	Performance	Performance-Enhanced (Discontinued)
Max. bandwidth	150 MB/s	1 GB/s	350 MB/s	2 GB/s
Max. IOPS	5,000	15,000	20,000	100,000
Single-queue, 4 KiB latency	2–5 ms	2–5 ms	1–3 ms	1–3 ms
Capacity	500 GB to 32 TB	10 TB to 320 TB	500 GB to 32 TB	10 TB to 320 TB
Medium Type	HDD	HDD	SSD	SSD
Highlights	Large capacity and low cost		Low latency and high IOPS
Typical use cases	Code storage, log storage, file sharing, and enterprise OA		High-performance website, file sharing, content management, image rendering, AI training, and enterprise OA

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 TiB 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 TiB, 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.
In the table, the maximum IOPS and maximum bandwidth all include both the read and write operations. So, maximum IOPS = read IOPS + write IOPS.
The minimum expansion increment of an SFS Turbo Standard-Enhanced (discontinued), Standard, Performance-Enhanced (discontinued), or Performance file system is 100 GB. The minimum expansion increment of a 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, 250 MB/s/TiB, 500 MB/s/TiB, or 1,000 MB/s/TiB file system is 1.2 TB, and the new capacity must be an integral multiple of 1.2.