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Change the default load balance policy
41 Dell EMC SC Series: Microsoft Multipath I/O Best Practices | CML1004
Parameter
Definition
4
Least queue depth
5
Weighted paths
6
Least blocks
7
Vendor specific
For example, to change all SC Series volumes to a failover only policy, enter the following command:
mpclaim.exe -L -M 1 -d "COMPELNTCompellent Vol"
10.2 PowerShell (Windows Server 2012 or later)
Use the MPIO module in PowerShell to change the host server default load balance policy.
Open a PowerShell window with elevated (administrator) privilege. See the following examples.
Example 1: Change the default load balance policy from round robin (RR) to failover only (FOO):
Set-MSDSMGlobalDefaultLoadBalancePolicy –Policy "FOO"
Example 2: Change the default load balancing back to round robin:
Set-MSDSMGlobalDefaultLoadBalancePolicy –Policy "RR"
Verify the default load balance policy:
Get-MSDSMGlobalDefaultLoadBalancePolicy
• If the default policy is set to round robin, RR is returned.
• If the default policy is set to failover only, FOO is returned.
10.3 Per-volume load-balancing settings
The MPIO load balance policy can also be changed on a per-volume basis. This allows organizations with
different workloads on different volumes with different load-balancing requirements to run on the same server.
Use Disk Management or the MPCLAIM utility to change the per-volume policy.
Note: The PowerShell MPIO module does not include cmdlets that can change the default load balance
policy on a specific volume.
10.3.1 Disk Management GUI
1. Go to Start > Administrative Tools > Computer Management.
2. On the left, expand Storage and click Disk Management.
3. Right-click the desired disk number and select Properties.
4. Select the MPIO tab.