You can adjust the queue depth settings as needed to optimize the I/O performance of the devices. The appropriate queue depth settings (max tag count) for each operational environment must be carefully researched and determined. In addition, the requirements for host queue depth depend on the storage system model.
The following table lists the queue depth settings to ensure smooth processing at the ports and best average performance. Other queue depth settings, higher or lower than these values, can provide improved performance for certain workload conditions.
CAUTION:
Higher queue depth settings (for example, >2,048 per port) can impact host response times. Exercise caution when using queue depth settings that are higher than these values.
Queue depth settings
| Storage system | Best practice queue depth settings |
|---|---|
| VSP One Block 20 | Target ports:
|
| VSP 5000 series | Target ports:
Bidirectional ports:
|
| VSP E series | Target ports:
Universal ports:
|
| VSP G130, G/F350, G/F370, G/F700, G/F900 | Target ports:
Universal ports:
|
| VSP G200, G400, G600, G800, VSP F400, F600, F800 |
|