Storage Pool Types and Performance
DSS provides two types of storage pools, which differ in I/O performance and price. You can select the storage pool type based on your service requirements.
The disk type must be consistent with the storage pool type you selected.
Application Scenarios
- High I/O storage pool supports only high I/O disks. It can deliver a maximum of 1,500 IOPS per TB and a minimum of 1 to 3 ms read/write latency (single queue, 4 KiB data blocks). This type of storage pools is designed for mainstream high-performance, high-reliability applications, such as enterprise applications, large-scale development and testing, and web server logs.
- Ultra-high I/O storage pool supports only ultra-high I/O disks. It can deliver a maximum of 8,000 IOPS per TB and a minimum of 1 ms read/write latency (single queue, 4 KiB data blocks). This type of storage pools is perfect for read/write-intensive application scenarios, such as the distributed file systems in the HPC scenarios or NoSQL and relational databases in I/O-intensive scenarios.
Storage Pool Performance
Key metrics of the storage pool performance include read/write I/O latency, IOPS, and throughput.
- IOPS: Number of read/write operations performed per second
- Throughput: Amount of data read from and written into a storage pool per second
- Read/write I/O latency: Minimum interval between two consecutive read/write operations
Parameter |
High I/O |
Ultra-high I/O |
|---|---|---|
IOPS |
1,500 IOPS/TB |
8,000 IOPS/TB |
I/O read/write latency (single queue, 4 KiB data blocks) |
1 ms to 3 ms |
1 ms |
Typical application scenarios |
Common development and test environments |
|
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