Increasing Bandwidth With Multiple Iscsi Sessions; Setting Load Balance Policies In Vmware - Dell PowerVault MD3860i Series Deployment Manual

If more than one data path to the virtual disk has the same weight value, the round robin with subset path
selection policy is used to route I/O requests between the paths with the same weight value. The least
path weight load balance policy is not supported on Linux operating systems.

Increasing Bandwidth With Multiple iSCSI Sessions

The PowerVault MD3860i series storage array in a duplex configuration supports two active/active
asymmetric redundant controllers. Each controller has four 1 Gbps Ethernet ports that support iSCSI. The
bandwidth of the four ports on the same controller can be aggregated to provide optimal performance. A
host can be configured to simultaneously use the bandwidth of both the ports on a controller to access
virtual disks owned by the controller. The multi-path failover driver that Dell provides for the MD3860i
series storage array can be used to configure the storage array so that all ports are used for simultaneous
I/O access. If the multi-path driver detects multiple paths to the same virtual disk through the ports on
the same controller, it load-balances I/O access from the host across all ports on the controller.

Setting Load Balance Policies in VMware

VMware supports Asymmetric Logical Unit Access (ALUA). For more information on Most Recently Used
(MRU) and Round Robin (RR) load balancing policies, see VMware documents.
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