Dell PowerVault 700N Dell PowerVault NAS Solution iSCSI Deployment Guide - Page 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. Appendix 47