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

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

**Table 1** SFS Capacity-Oriented file systems
Parameter	Description
Max. bandwidth	10 GB/s
Max. IOPS	10,000
Latency	Latency ranges: For sequential large I/Os of large files, the latency ranges from 20 ms to 50 ms. For sequential small I/Os of large files, the latency ranges from 10 ms to 20 ms. For random small I/Os of large files, the latency ranges from 200 ms to 500 ms.
Max. capacity	2 PB
Highlights	Large capacity, high bandwidth, and low cost
Application Scenarios	Cost-sensitive workloads which require large-capacity scalability, such as media processing, file sharing, HPC, and data backup. For workloads dealing with massive small files, SFS Turbo is recommended.

**Table 2** General purpose file systems
Parameter	Description
Max. bandwidth	5 GB/s
Latency	10 ms
Max. capacity	4 PB
Highlights	Large capacity, high bandwidth, and low cost
Application Scenarios	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.

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.

**Table 3** SFS Turbo file systems
Parameter	20 MB/s/TiB	40 MB/s/TiB	125 MB/s/TiB	250 MB/s/TiB
Max. bandwidth	8 GB/s	8 GB/s	20 GB/s	20 GB/s
Max. IOPS	250,000	250,000	1 million	1 million
Single-queue, 4 KB latency	2–5 ms	2–5 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
IOPS calculation formula	IOPS = Min. (250,000, 600 x Capacity) Capacity unit: TB	IOPS = Min. (250,000, 1,200 x Capacity) Capacity unit: TB	IOPS = Min. (1,000,000, 6,000 x Capacity) Capacity unit: TB	IOPS = Min. (1,000,000, 12,500 x Capacity) Capacity unit: TB
Highlights	Large capacity and low cost	Large capacity and low cost	Low latency and cost effectiveness	Low latency and cost effectiveness
Typical scenarios	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.

**Table 4** Previous-generation SFS Turbo file systems
Parameter	Standard	Standard-Enhanced	Performance	Performance-Enhanced
Max. bandwidth	120 MB/s	1 GB/s	320 MB/s	2 GB/s
Max. IOPS	3,000	15,000	20,000	100,000
Single-queue, 4 KB 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
Highlights	Low latency and tenant exclusive	Low latency, high bandwidth, and tenant exclusive	Low latency, high IOPS, and tenant exclusive	Low latency, high IOPS, high bandwidth, and tenant exclusive
Typical scenarios	Code storage, file sharing, enterprise OA, and log storage.	Code storage, file sharing, enterprise OA, and log storage.	HPC websites, file sharing, content management, image rendering, AI training, and enterprise OA.	HPC websites, file sharing, content management, image rendering, AI training, and enterprise OA.

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 SFS Turbo Standard, Standard-Enhanced, Performance, and Performance-Enhanced file systems is 100 GB. The expansion increment of 20 MB/s/TiB, 40 MB/s/TiB, 125 MB/s/TiB, and 250 MB/s/TiB file systems is 1.2 TB.
Maximum performance can be reached with multiple ECSs in parallel which have recommended configuration c4.4xlarge.4.

File System Types