
Least Queue Depth With Subset
The least queue depth with subset policy is also known as the least I/Os, or least requests, policy. This policy routes the next I/O request to a data path that has the least outstanding I/O requests queued. For this policy, an I/O request is simply a command in the queue. The type of command or the number of blocks that are associated with the command are not considered. The least queue depth with subset policy treats large block requests and small block requests equally. The data path selected is in the path group of the RAID controller module that owns the virtual disk.
Changing Load Balance Policies in Windows Sever 2008
Load balancing with the PowerVault MD3200 series is only available for Windows Server 2008 and later versions of the operating system. You can change the load balance policies from the default round robin with subset by using one of the following:
•Device Manager options
•Disk Management options
Changing the Load Balance Policy Using Windows Server 2008 Device Manager Options
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2Click Device Manager to show the list of devices attached to the host.
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4Select the load balance policy you want to set for this disk device from the MPIO tab.
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