.. _Configuring Multipath I/O for iSCSI Targets:

Configuring Multipath I/O for iSCSI Targets
-------------------------------------------

Multipath I/O is a technique called to increase fault tolerance and performance by establishing multiple paths to the same iSCSI target. The figure below shows a typical multipath-enabled setup for exporting |product_name| disk space over iSCSI.

.. image:: /images/image020.png
        :align: center
	:class: align-center

In this example, each iSCSI target is assigned static IP addresses from two datacenter subnets. In case one of the network connections fails, the iSCSI targets will still be accessible via the other one.

To enable multipath I/O for an iSCSI target, assign to it multiple IP addresses from different networks using the ``-a`` option. For example:

::

    # vstorage-iscsi create -n ps1 -a 192.168.10.101 -a 192.168.20.101