Dell MD3200 manual Least Queue Depth With Subset, Changing Load Balance Policies in Windows Sever

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

1Right-click My Computer and select Manage to open the Computer Management window from the host desktop.

2Click Device Manager to show the list of devices attached to the host.

3Right-click the multi-path disk device for which you want to set load balance policies, then select Properties.

4Select the load balance policy you want to set for this disk device from the MPIO tab.

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Appendix—Load Balancing