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Devices tab – Dell PowerVault NX3000 User Manual

Page 47

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Appendix

47

Devices Tab

The Devices tab of Target Properties screen provides generic device details
like the virtual disks that are associated with Target.

Click Advanced to view information about MPIO and launch the Device
Details screen.

You can use the MPIO tab to modify the MPIO settings. On this tab, you can
select the appropriate Load Balance Policy settings. You can configure Load
balancing for each connection from the different Load Balance Policy options
that are available. When you select each policy in the Load Balance Policy
field of the MPIO tab, the following descriptions are displayed on the screen:

Fail Over Policy—

The fail over policy employs one

active path and designates all other paths as

standby. The standby paths will be tried on a

round-robin approach upon failure of the active

path until an available path is found

.

Round Robin—

The round robin policy attempts to

evenly distribute incoming requests to all

possible paths

.

Round Robin With Subset—

The round robin subset policy

executes the round robin policy only on paths

designated as active. The stand-by paths will be

tried on a round-robin approach upon failure of

all active paths.

Least Queue Depth—

The least queue depth policy

compensates for uneven loads by distributing

propeortiaonately more I/O requests to lightly

loaded processing paths.

Weighted Paths—

The weighted paths policy allows the

user to specify the relative processing load of

each path. A large number means that the path

priority is low.

The default option is Round Robin. Select the required option from the
Load Balance Policy drop-down menu to configure the Load Balance Policy
and click Apply to confirm your setting.