ECSs support the following types of EVS disks for storing data:
- Common I/O: EVS disks of this type deliver a maximum of 2,200 IOPS. This disk type is suitable for application scenarios that require large capacity, a medium read/write rate, and fewer transactions, such as enterprise office applications and small-scale testing.
- High I/O: EVS disks of this type deliver a maximum of 5,000 IOPS and a minimum of 1 ms read/write latency. This disk type is designed to meet the needs of mainstream high-performance, high-reliability application scenarios, such as enterprise applications, large-scale development and testing, and web server logs.
- Ultra-high I/O: EVS disks of this type deliver a maximum of 33,000 IOPS and a minimum of 1 ms read/write latency. This disk type is excellent for ultra-high I/O, ultra-high bandwidth, and read/write-intensive application scenarios, such as distributed file systems in HPC scenarios or NoSQL/RDS in I/O-intensive scenarios.
EVS disks with different I/O capacities provide different features at different prices. Choose EVS disks based on your requirements. For more information about EVS disk specifications and performance, see Elastic Volume Service User Guide.