Host I/O Limits in PowerMax allow you to control the maximum IOPS (Input/Output Operations Per Second) or bandwidth that a storage group can consume. This helps prevent performance issues caused by one application or workload monopolizing resources.
When you associate Host I/O Limits with a Storage Group, the default Dynamic I/O distribution mode is set to Never.
* Never:This means that the I/O limits are statically distributed across the directors in the associated masking view. If a director fails, its allocated portion of the I/O limit is lost. This is the most conservative setting, as it ensures that the I/O limits are strictly enforced even in the event of a director failure.
You can change this setting toBalancedorAlwaysif you need more dynamic distribution of I/O limits.
References and documents of Dell's public documentation for PowerMax Operate v.2:
* Dell PowerMax and VMware vSphere Configuration Guide:This guide provides detailed information about Host I/O Limits, including the different distribution modes and their benefits. You can find this document on the Dell Support website by searching for "PowerMax and VMware vSphere Configuration Guide."
* Dell Solutions Enabler 10.0.0 CLI User Guide:This guide provides information on how to set Host I
/O Limits using SYMCLI commands, including the -dynamic option for specifying the distribution mode.