Solaris Multiplexed I/O

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Solaris Multiplexed I/O (MPxIO), known also as Sun StorageTek Traffic Manager (and earlier, Sun StorEdge Traffic Manager), is software integrated within the Solaris OS beginning with Solaris 8 that enables a storage device to be accessed through multiple host controller interfaces from a single operating system instance. The MPxIO architecture helps protect against I/O outages due to I/O controller failures. Should one I/O controller fail, MPxIO automatically switches to an alternate controller.

This architecture also increases I/O performance by load balancing across multiple I/O channels.

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